Lintel Pocket Guide - Avenue Baptist Church

Transcription

Catnic
Lintel Pocket Guide
June 2003
About Corus
Corus is a major European producer
of steel and aluminium. Our multimetals approach is one of the unique
features of the company, and is at
the heart of our strategy. Many
things we use in our daily lives has
in some way involved metal in its
creation. We work with automotive
and packaging designers, architects,
a broad range of engineers, and with
those whose profession is product
and industrial design.
Corus was formed on the
6 October 1999, through the merger
of British Steel and Knoninklijke
Hoogovens to create an innovative
metals company, which combines
international expertise with a first
class service.
Corus deliver more than just highquality metal products. They are
active business partners, helping
customers identify and take
advantage of new opportunities.
Through this, customers gain access
to a global network of knowledge and
expertise to help optimise their own
processes and products.
Thanks to our business units Corus
supplies and manufactures a wide
range of steel and aluminium
products to the construction industry
world wide, including building
envelope systems, light structural
elements and aluminium and wall
cladding systems.
Systems and services include:
• Building envelope systems
• Roof and wall cladding systems
• Curtain walling
• Trapezoidal sheets for cladding
• Composite panels for cladding
• Roof deck profiles
• Composite floor deck profiles
• Light structural elements (lintels,
building components and framing)
• Industrial doors
• Flashings and accessories
• Perforated coil and sheet products
About Catnic
Catnic specialises in the manufacture
and supply of steel lintels, profiles,
fence post support systems and
roofing systems of the very highest
standard and quality.
om
w
Catnic is committed to providing the
building industry with a steady supply
of new and improved products borne
We hope that you will find the
information in the following pages
both useful and
informative, but
our webs
i
s it
if you require any
further assistance,
please call
w
029 2033 7900.
w.
c
c.c
te
Additionally, our sales and technical
service teams are dedicated to
matching the quality of our products
with the excellence of our service.
Sales and technical support staff are
friendly, helpful and highly
professional.
from our investment in design and
manufacturing technology. This
brochure gives an overview of our
Lintels product range along with
comprehensive technical and
specification data. Details of our
profiles range, fence post support
systems and roofing system can be
found in separate brochures available
on request from the telephone number
given below.
vi
Our reputation for the superior
quality of our products has
been earned through constant
technical innovation and
development. Choosing a Catnic
product from our comprehensive
range assures peace of mind and
complete confidence in the
finished job.
atni
Contents
2
2
5
6
14
21
25
28
Lintel and Service Benefits
Selecting the Right Lintel
Installing a Catnic Lintel
Cougar Open Back Lintels
Classic Combined Box Lintels
Cavity Wall Eaves Lintels
CXL Lintels
Timber Frame Lintels
31
35
39
43
47
48
49
49
External Solid Wall Lintels
Internal Solid Wall Lintels
Feature Lintels
Accessories
Where to use a separate DPC
Technical Information
Technical Specification
Quality Assurance
Lintel Pocket Guide
1
Lintel Benefits
Service Benefits
Duplex corrosion protection
Many Catnic lintels employ not just one
but two methods of protection against
corrosion attack: the unique,
sophisticated Duplex double protection
system.
Technical support
Experienced engineers qualified in
construction enable Catnic to offer a
design and advisory service for any
building project.
• 1st corrosion protection layer –
galvanised steel
• 2nd corrosion protection layer –
polyester coating
The Catnic Lintel Advanced
Scheduling System
(CLASS) is the most comprehensive free
lintel scheduling service available. One
clear, concise document provides:
The lintels are manufactured from hotdipped galvanised steel to BS
EN10142: 2000 of grade DX51D & Z275
with a black coloured polyester resin
finish. The protection system complies
fully with the chemical and physical test
requirements outlined in Table 2 of BS
5977: PART 2: 1983 for lintels
effectively having their own built-in
Damp Proof Course (DPC).
• a description of each lintel and its
location
• list price
• guaranteed structural adequacy
This double method of protection gives
Catnic lintels inherent benefits over
those offered by other manufacturers
using the more traditional pre- or postgalvanised steel techniques. The
polyester coating in the Catnic process
provides an effective barrier against
moisture or chemical attack leached
from the masonry construction.
029 2033 7900
Free design service
In addition to its standard range, Catnic
offer a bespoke design service to satisfy
diverse configurations and features.
Telephone Technical Services on
or alternatively fax your enquiry on
029 2086 0135
How to Select a Catnic Lintel
To select a Catnic lintel, you need to
know three things:
1 The wall construction
2 The length of lintel required
3 The load to be placed on the lintel
(refer to page 48 for safe working
loads)
1. Wall Construction
If you know the wall construction, see
the Lintel Selection Index on page 4 to
find the correct lintel. Alternatively, please
refer to the construction types below:
Cavity Wall
You will need to know the cavity wall
dimensions to choose the correct lintel,
ie. the external leaf dimension, the
cavity dimension and the internal leaf
dimension.
Timber Frame
For timber frame constructions, you
need to know the external leaf dimension
and the cavity dimension – there is no
internal leaf. Once you have these
dimensions, please refer to the Timber
Frame lintels section on page 29.
External Solid Wall
There are three forms of lintel for
external solid walls:
• single element lintels for a single leaf
of brickwork
• two-piece lintels shaped to carry the
two separate leaves of a 215mm fair
face brick wall
• box profile lintels which have a toe for
use in solid brick or block walls from
200mm – 215mm thick
Lintels suitable for use in external solid
wall constructions can be found on
page 32.
2
Lintel Pocket Guide
2. Lintel Length
The length of lintel required is
calculated by establishing the total
width of the structural opening and
adding 150mm (200mm for CXL lintels)
end bearing allowance for each end.
For example, an 1800mm structural
opening will require a 2100mm lintel
(2200mm for CXL).
Internal Partition & Load Bearing Wall
Lintels for internal partitions and load
bearing walls come in three styles:
• corrugated lintels for non-load bearing
applications
• channel section lintels for loadings
involving floor joists or blockwork
• box profile lintels for heavier loads
including point loads and wider
openings
3. Applied Load
All lintels are designed to carry a
specific safe working load. If you are
not skilled in the method of load
assessment, or the load has not been
supplied to you by a third party, then
please contact Catnic Technical
Services on 029 2033 7900 for advice.
These lintels are featured on page 36.
How to Select a Lintel for Cavity Walls
Lintel Selector
Cavity (mm)
140mm
125mm
115mm
100mm
Inner Block size (mm)
50-65
Pg
90-105
Pg
CG50/100
CGH50/100
8
8
CG70/100
CGH70/100
70-85
Pg
10 CG90/100
10 CGH90/100
12
12
CU50/100
8
CU70/100
10 CU90/100
12
CN7
CN8
15 CN3
15 CN4
16 CN14
16
17
CG50/100
CGH50/100
8
8
CG70/100
CGH70/100
10 CG90/100
10 CGH90/100
12
12
CU50/100
8
CU70/100
10 CU90/100
12
CN3
CN4
16 CN3* CN4*
16 CN14**
16 –
17
CG50/125
CGH50/125
9
9
CG70/125
CGH70/125
11 CG90/125
11 CGH90/125
13
13
CU50/125
9
CU70/125
11 CU90/125
13
CN43
CN44
18
18
CG50/125
CGH50/125
9
9
CG70/125
CGH70/125
11 CG90/125
11 CGH90/125
13
13
CU50/125
9
CU70/125
11 CU90/125
13
CN11
CN12
19 CN57
19 CN58
–
–
20
20
–
Lintels illustrated above are based on 102mm masonry outer leaf
* Suitable for 70mm cavity only
** Suitable for 75mm – 85mm cavity only
Lintel Pocket Guide
3
Lintel Index
Outer
Leaf
Cavity Inner
Leaf
Lintel
Codes
Lintel
Application
Page
102
50-65
100-115
CG50/100
Cougar Open Back Lintel
8
102
50-65
100-115
CGH50/100
8
102
50-65
100-115
CU50/100
8
102
50-65
125-140
CG50/125
Cougar Wide Inner Leaf Open Back Lintel
9
102
50-65
125-140
CGH50/125
9
102
50-65
125-140
CU50/125
9
102
70-85
100-115
CG70/100
10
102
70-85
100-115
CGH70/100
10
102
70-85
100-115
CU70/100
10
102
70-85
125-140
CG70/125
11
102
70-85
125-140
CGH70/125
11
102
70-85
125-140
CU70/125
11
102
90-105
100-115
CG90/100
12
102
90-105
100-115
CGH90/100
12
102
90-105
100-115
CU90/100
12
102
90-105
125-140
CG90/125
13
102
90-105
125-140
CGH90/125
13
102
90-105
125-140
CU90/125
13
102
50-65
100
CN7, CN8
Classic Combined Box Lintel
15
102
70-85
100
CN3, CN4
16
102
50-65
115
CN3, CN4
16
102
90-105
100
CN14
17
102
75-90
115
CN14
17
140-150 50
100-115
CN42
Classic Combined Box Lintel – Wide Outer Leaf
17
102
50-65
125
CN43, CN44
Classic Combined Box Lintel – Wide Inner Leaf
18
102
50-55
130
CN43, CN44
18
102
50-65
140
CN11, CN12
19
102
50-55
150
CN11, CN12
19
102
75
135-150
CN57, CN58
20
N/A
50-85
100-115
CGE50/100
*Open Back Eaves Lintel
23
N/A
50-85
125-140
CGE50/125
*Wide Inner Leaf Open Back Eaves Lintel
23
N/A
90-105
100-115
CGE90/100
*Open Back Eaves Lintel
23
*Wide Inner Leaf Open Back Eaves Lintel
23
N/A
90-105
125-140
CGE90/125
N/A
50-75
100
CN55
Box Eaves Lintel
24
102
50
100-115
CXL240
Extreme Heavy Duty Lintel
27
102
50-70
100-140
CXL265
27
102
70-90
100-140
CXL290
27
102
50-60
–
CTF5/CTF7
Timber Frame Lintel
30
102
35-60
–
CN23
Timber Frame Lintel
30
200-215 –
–
CN71, CN81
External Solid Wall
33
102
–
–
CN48, CN49
External Solid Wall
34
102
–
–
CNZ94, CNZ95, External Solid Wall
34
215
–
–
CN50, CN51
External Solid Wall
N/A
–
75
CN92
Internal Partition Lintel
37
N/A
–
100
CN100, CN102 Internal Partition Lintel
37
N/A
–
100
CN5X, CN6X
N/A
–
140-150
CN56X, CN66X Internal Partition Lintel
CNZ96, CNZ97
* Cougar Open Back range lintels
4
Lintel Pocket Guide
Internal Partition Lintel
34
37
38
Installing a Catnic Lintel
Ensure lintel is level along its length.
Ensure a nominal
150mm end bearing
at each end.*
Ensure lintel is
not damaged.
Ensure lintel is fully
bedded on
bricklaying mortar.
Structural opening
Ensure lintel is level along its width.
In cavity walls, raise inner
and outer leaves supported
by lintel together.†
Masonry above lintels
should be allowed to
cure before applying
floor or roof loads.
Ensure wall dimensions
are correct.
* For advice on installations where
end bearings can be reduced to
not less than 100mm, please
contact Catnic Technical
Services.
† Ensure no more than half the safe
working load (SWL) is carried by
the outer leaf where the lintel
carries an external cavity wall.
The wall should also be
restrained laterally near the top.
Ensure that masonry
overhang does not
exceed 25mm.
Outer
Leaf
Cavity
Inner
Leaf
Additional Notes
Do
Install a separate DPC in severe exposure conditions. A Catnic Cougar Open Back or Classic
Combined Box lintel with an additional DPC membrane installed in accordance with normal
practice provides the best possible protection.
Locate the window/door frame so that the drip on the front of the lintel projects forward of the
drip on the front of the frame. It is good building practice to insert a flexible joint between the
lintel and the top of the frame.
Ensure that point loads are not applied directly to the flanges of lintels. Timber floor joists and
roof trusses should have a full block depth between them and the lintel flange.
Refer to the Steel Lintels Manufacturers Association’s leaflet “Recommendations for the
Installation of Concrete Floors with Steel Lintels” when using Open Back lintels to support
concrete floors.
Refer to our Technical Services Department if cutting CG or CGH type lintels under
any circumstances.
Consider the use of our soffit cladding for all coastal sites (refer to pages 46/47).
Don’t
Use damaged lintels.
Apply point loads without prior consultation. Where the loading or a substantial part of it is
applied as concentrated loads, each concentrated load must be supported over a length of lintel
of not less than 200mm. In such cases, the total loading must not produce bending movements
or shear forces greater than those produced by the uniformly distributed loads specified in the
relevant data tables.
Allow blockwork to overhang the lintel by more than 25mm.
Apply concrete floor loads without ensuring that the total loads are checked by a structural
engineer, or by Catnic Technical Services.
Lintel Pocket Guide
5
Catnic Cavity Wall Lintels
Two styles available for use in cavity
wall construction: Catnic ‘Cougar
Open Back’ and ‘Classic Combined
Box’ lintels incorporating insulation,
built-in plaster key and built-in DPC.
6
Lintel Pocket Guide
Cougar Open Back Lintels
An economical solution for domestic and commercial uses.
Typical Applications
CG
• Triangulated masonry load
• Supporting uniformly distributed
masonry load
• Supporting uniformly distributed
timber floor and roof loads
• Suitable for fair faced inner leaf
masonry
CGH
As above plus:
• Increased loading conditions
• Uneven loading situations
• Nominal point loading eg. stair
trimmers, stud partition supports, etc.
CU
As above plus:
• Supports concrete floors
• Attic truss loads
• Larger span multiple truss loads
• Features could be inserted including
suitability for point loading
• Available for longer length applications
Conditions of Use
• Nominal 150mm end bearings
• Both leaves are raised together
• One course of block prior to
installation of floor/roof
• Refer to ‘Installing a Catnic Lintel’
(page 5)
Isometric view of a typical Catnic Cougar lintel
over a timber window.
CG Lintel
CU Lintel
Benefits
Materials used in Cougar Lintels
The CG, CGH and CU ranges are formed
from galvanised steel, then powder
coated.
Integral insulation
Maximising thermal efficiency, minimising
cold bridging.
Ensures optimum durability and
longevity.
Easy-to-use open back profile
Allows masonry to be built up
continuously on both outer and inner
leaf.
Built-in DPC
Saves time in construction, and means
cavity is easy to clean without risk of
damage to DPC.
Built-in plaster key
With staggered slots applied to the inner
flange and ribbed underside of insulation
(perforated steel baseplate on CU
range only).
Accessories
ArchCentres, Stop Ends, Cavity Weep
Vents, Soffit Cladding (refer to page
44/46).
NOTE: Whilst the above information is intended to offer general guidance regarding
typical applications, it should not be considered as comprehensive. Requirement not
fully covered by the above should be referred to our technical services department for
individual consideration.
Lintel Pocket Guide
7
Cavity Walls
For 50-65mm Cavity 100-115mm Inner Leaf
Cougar Open Back
CG50/100
7501500
L
16501800
19502100
22502400
25502700
3000
33003900
SWL
15
18
20
22
26
26
26
W
5.80
7.34
7.96
8.59
9.84
12.29
16.02
H
140
140
160
180
220
220
220
1800
2100
1
CGH50/100
9001200
L
1500
SWL
23
29
34
40
W
9.5
11.1
14.2
16.2
H
140
180
180
220
1
CU50/100
L
7503000
33003900
42004800
SWL1
74
47
29
SWL5
75
51
31
W
19.4
19.4
19.4
H
232
232
232
L Standard Lengths (mm)
W Weight (kg/m)
Note: To achieve the ‘CU’ loading
figures indicated, lintels must be built-in
as illustrated, ensuring that the
blockwork infill is well-jointed during
construction and compatible with the
strength of the masonry above.
SWL1 SWL 1:1/1:3(kN)
SWL5 SWL 1:5/1:19 (kN)
H Nominal Height ‘h’ (mm)
Concrete Floor Loads
When using the Catnic CU Open Back range with concrete floors, always ensure that
the blockwork is built tight against the inner vertical face of the lintel, and that a
mortar joint is added to the top of the blockwork so that the floor units have an even
spread over the inner flange of the lintel.
95
48
100
95
48
8
Lintel Pocket Guide
95
48
CGH Lintel
100
Continuous
solid infill
block
h
h
CG Lintel
100
CU Lintel
h
Cavity Walls
For 50-65mm Cavity 125-140*mm Inner Leaf
Cougar Open Back
Wide Inner Leaf
CG50/125*
7501200
L
13501800
21002400
25502700
3000
SWL
12
17
20
26
26
W
6.3
7.78
9.03
12.87
16.55
H
140
140
180
220
220
1800
2100
1
CGH50/125*
9001200
L
1500
SWL
23
29
34
40
W
10.0
11.6
14.8
16.8
H
140
180
180
220
1
CU50/125
L
7503000
33003900
42004800
SWL1
74
47
29
SWL5
75
51
31
W
19.7
19.7
19.7
H
232
232
232
W Weight (kg/m)
SWL1 SWL 1:1/1:3 (kN)
SWL5 SWL 1:5/1:19 (kN)
Standard lengths are available in increments of 150mm at lengths up to 3000mm,
300mm at lengths from 3000mm – 4800mm (including 4575mm, but excluding 4500mm).
The SWL (safe working load) is based on the total UDL (uniform distributed load) over
maximum span using 150mm end bearings.
* For applications incorporating 140mm solid aggregate concrete blocks, contact our
Technical Services Department on 029 2033 7900
95
48
125
95
48
95
48
CGH Lintel
125
Continuous
solid infill
block
h
h
CG Lintel
125
h
CU Lintel
Lintel Pocket Guide
9
Cavity Walls
Cougar Open Back
CG70/100
7501500
L
16501800
19502100
2400
25502700
3000
33003900
SWL
15
18
20
22
26
26
26
W
5.98
7.48
8.1
8.7
9.98
12.46
16.29
H
140
140
160
180
220
220
220
1800
2100
1
CGH70/100
9001200
L
1500
SWL
23
29
34
40
W
9.7
11.3
14.5
16.5
H
140
180
180
220
1
CU70/100
L
7503000
33003900
42004800
SWL1
74
47
29
SWL5
75
51
31
W
19.7
19.7
19.7
H
232
232
232
W Weight (kg/m)
SWL1 SWL 1:1/1:3 (kN)
SWL5 SWL 1:5/1:19 (kN)
95
68
100
95
68
10
Lintel Pocket Guide
95
68
CGH Lintel
100
Continuous
solid infill
block
h
h
CG Lintel
100
CU Lintel
h
Cavity Walls
Cougar Open Back
Wide Inner Leaf
CG70/125*
9001200
L
15001800
21002400
2700
3000
SWL
12
17
20
26
26
W
6.33
7.95
9.18
13.07
16.9
H
140
140
180
220
220
1800
2100
1
CGH70/125*
9001200
L
1500
SWL
23
29
34
40
W
10.2
11.8
15.1
17.1
H
140
180
180
220
1
CU70/125
L
7503000
33003900
42004800
SWL1
74
47
29
SWL5
75
51
31
W
19.9
19.9
19.9
H
232
232
232
W Weight (kg/m)
SWL1 SWL 1:1/1:3 (kN)
SWL5 SWL 1:5/1:19 (kN)
95
68
125
95
68
95
68
CGH Lintel
125
Continuous
solid infill
block
h
h
CG Lintel
125
h
CU Lintel
Lintel Pocket Guide
11
Cavity Walls
Cougar Open Back
CG90/100
7501500
L
16501800
19502100
2400
25502700
3000
33003900
SWL
15
18
20
22
26
26
26
W
6.13
7.63
8.26
8.88
10.15
12.96
16.6
H
140
140
160
180
220
220
220
1800
2100
1
CGH90/100
9001200
L
1500
SWL
23
29
34
40
W
10.0
11.6
14.8
16.8
H
140
180
180
220
1
CU90/100
L
7503000
33003900
42004800
SWL1
74
47
29
SWL5
75
51
31
W
19.8
19.8
19.8
H
232
232
232
W Weight (kg/m)
SWL1 SWL 1:1/1:3 (kN)
SWL5 SWL 1:5/1:19 (kN)
95
88
100
95
88
12
Lintel Pocket Guide
95
CGH Lintel
88
100
Continuous
solid infill
block
h
h
CG Lintel
100
CU Lintel
h
Cavity Walls
Cougar Open Back
Wide Inner Leaf
CG90/125*
9001200
L
15001800
21002400
2700
3000
SWL
12
17
20
26
26
W
6.5
8.13
9.36
13.28
17.2
H
140
140
180
220
220
1800
2100
1
CGH90/125*
9001200
L
1500
SWL
23
29
34
40
W
10.4
12.0
15.4
17.4
H
140
180
180
220
1
CU90/125
L
7503000
33003900
42004800
SWL1
74
47
29
SWL5
75
51
31
W
20.1
20.1
20.1
H
232
232
232
W Weight (kg/m)
SWL1 SWL 1:1/1:3 (kN)
SWL5 SWL 1:5/1:19 (kN)
95
88
125
95
88
95
88
CGH Lintel
125
Continuous
solid infill
block
h
h
CG Lintel
125
h
CU Lintel
Lintel Pocket Guide
13
Classic - Combined Box Lintels
A cost effective solution for all types of building construction
including housing, multiple storey, commercial, etc.
• Universal application caters for all
loading conditions
• Direct floor or roof loading
• Supports concrete floor loads
• Supports points loads eg. steel
beams, etc.
• Optional 4 course profile for high
loads at extended spans
Lintel features
Catnic classic lintels incorporate full
height expanded polystyrene insulation
along the complete lintel length, secured
within the box section to prevent damage
on site. This range also includes lintel
profiles designed for closed eaves
applications.
Integral insulation
Maximising thermal efficiency.
Conditions of Use
• Nominal 150mm end bearings
Isometric view of a typical combined box
lintel supporting a concrete floor.
Minimal cold bridging
Staggered slots in base plate
minimises cold bridging.
Instant full load use
The Classic profile is designed to
carry a full load of wet masonry as
soon as it is installed.
longevity.
Tried and trusted
Over 30 years success.
Built in DPC
Saves time in construction, and
means cavity is easy to clean without
risk of damage to DPC.
Accessories
44-46).
Box profile
Provides savings on blockwork and
installation costs.
IMPORTANT NOTE:
When using the Classic Lintel with
concrete floors, always ensure that a
mortar joint is added to the top of the
blockwork so that the floor units have
an even spread over the inner flange of
the lintel.
14
Lintel Pocket Guide
Cavity Walls
For 50-65mm Cavity
100mm Inner Leaf
Classic Combined Box
CN7A
L
7501500
CN7C
16502100
22502700
7501500
16501950
SWL
29
27
20
49
44
W
9.9
9.9
9.9
14.9
14.9
H
143
143
143
143
143
lxx
412
412
412
637
637
Zxx
49
49
49
76
76
SM
7.9
7.9
7.9
12.2
12.2
3600
39004575
CN8B
L
21003600
CN8C
21002700
28503300
4800
SWL
29
54
47
39
29
25
W
15.8
19.2
19.2
19.2
19.2
19.2
H
219
219
219
219
219
219
lxx
1388
1686
1686
1686
1686
1686
Zxx
110
137
137
137
137
137
SM
17.8
22.2
22.2
22.2
22.2
22.2
SWL SWL 1:1/1:5 (kN)
Ixx (cm4)
SM Serviceability moment (kNm)
W Weight (kg/m)
Zxx (cm3)
300mm at lengths from 3000mm – 4800mm (including 4575mm but excluding 4500mm).
95
50
100
95
50
100
h
h
CN7 Lintel
CN8 Lintel
Lintel Pocket Guide
15
Cavity Walls
For 70-85mm Cavity
100mm Inner Leaf
For 50-65mm Cavity
115mm Inner Leaf
CN3A
7501500
L
CN3C
16502100
22502700
7501500
16501950
SWL
26
24
20
49
44
W
10.2
10.2
10.2
16.0
16.0
H
143
143
143
143
143
lxx
434
434
434
641
641
Zxx
51
51
51
77
77
SM
8.2
8.2
8.2
12.4
12.4
3600
39004575
CN4B
CN4C
21003600
L
21002700
28503300
4800
SWL
29
54
47
39
29
25
W
16.1
20.4
20.4
20.4
20.4
20.4
H
219
219
219
219
219
219
lxx
1426
1730
1730
1730
1730
1730
Zxx
112
140
140
140
140
140
SM
18.1
22.7
22.7
22.7
22.7
22.7
Ixx (cm4)
W Weight (kg/m)
Zxx (cm3)
95
70
100
95
70
h
h
CN3 Lintel
16
Lintel Pocket Guide
100
CN4 Lintel
For 90-105mm Cavity
100mm Inner Leaf
Cavity Walls
For 75-90mm Cavity
115mm Inner Leaf
CN14A
L
7502700
CN14C
7502700
30003600
39004575
4800
SWL
29
47
39
29
25
W
13.1
20.0
20.0
20.0
20.4
H
219
219
219
219
219
lxx
1132
1740
1740
1740
1740
Zxx
86
138
138
138
138
SM
14.0
22.5
22.5
22.5
22.5
Combined Box
Classic Wide Outer Leaf
For 140-150mm Outer Leaf
50mm Cavity
100-115mm Inner Leaf
CN42C
L
7504200
SWL
29
W
20.5
H
1219
lxx
1834
Zxx
143
SM
23.2
95
90
100
h
CN14 Lintel
Lintel Pocket Guide
17
Cavity Walls
For 50-65mm Cavity
125mm Inner Leaf
Classic Combined BoxWide Inner Leaf
For 50-55mm Cavity
130mm Inner Leaf
CN43A
7501500
L
16502100
22502700
SWL
29
27
20
W
10.4
10.4
10.4
H
143
143
143
lxx
415
415
415
Zxx
49
49
49
SM
8.0
8.0
8.0
28503300
3600
CN44C
7502700
L
39004275
4800
SWL
54
47
39
29
26
W
20.2
20.2
20.2
20.2
20.2
H
219
219
219
219
219
lxx
1836
1836
1836
1836
1836
Zxx
152
152
152
152
152
SM
24.6
24.6
24.6
24.6
24.6
Ixx (cm4)
W Weight (kg/m)
Zxx (cm3)
95
50
125
95
50
125
h
h
CN43 Lintel
18
Lintel Pocket Guide
CN44 Lintel
For 50-65mm Cavity
140mm Inner Leaf
Cavity Walls
For 50-55mm Cavity
150mm Inner Leaf
CN11A
L
7501500
16502100
22502700
SWL
29
27
20
W
10.8
10.8
10.8
H
143
143
143
lxx
425
425
425
Zxx
49
49
49
SM
8.0
8.0
8.0
28503300
3600
CN12C
L
7502700
39004275
4800
SWL
54
47
39
29
26
W
20.5
20.5
20.5
20.5
20.5
H
219
219
219
219
219
lxx
1878
1878
1878
1878
1878
Zxx
158
158
158
158
158
SM
25.7
25.7
25.7
25.7
25.7
Ixx (cm4)
W Weight (kg/m)
Zxx (cm3)
95
50
140
95
50
140
h
h
CN11 Lintel
CN12 Lintel
Lintel Pocket Guide
19
Cavity Walls
For 75mm Cavity
CN57A
7501500
L
16502100
22502700
SWL
25
22
20
W
11.1
11.1
11.1
H
143
143
143
lxx
416
416
416
Zxx
46
46
46
SM
7.6
7.6
7.6
28503300
3600
CN58C
7502700
L
39004575
4800
SWL
54
47
39
26
26
W
21.9
21.9
21.9
21.9
21.9
H
219
219
219
219
219
lxx
1812
1812
1812
1812
1812
Zxx
145
145
145
145
145
SM
23.7
23.7
23.7
23.7
23.7
Ixx (cm4)
W Weight (kg/m)
Zxx (cm3)
95
75
140
95
75
140
h
h
CN57 Lintel
20
Lintel Pocket Guide
CN58 Lintel
Catnic Cavity Wall Eaves Lintels
Two styles available for use in cavity
wall construction for closed eaves
applications: Catnic ‘Cougar Open
Back’ and ‘Classic Combined Box’
eaves lintels incorporating insulation
and built-in plaster key.
Lintel Pocket Guide
21
Closed Eaves Lintels
Eaves Lintels
Closed eaves lintels are
manufactured from galvanised steel
and powder coated for extra
protection. Available in both Cougar
open back or Classic box styles.
Integral insulation
Maximising thermal efficiency,
minimising cold bridging.
Extra corrosion protection
longevity.
Easy-to-use open back profile
Allows masonry to be built up
continuously on inner leaf.
With staggered slots to the inner
flange and ribbed underside of
insulation.
Extended durability
Duplex system providing twice
the protection.
* To achieve the stated safe working load (SWL), closed eaves lintels must be built in
with solid blockwork and continuous timber wall-plates. Allow 150mm at each end
for bearing support.
22
Lintel Pocket Guide
Closed Eaves
Cougar Open Back
CGE50/100
L
7501500
16502100
60
2400
48
100
2700
SWL
25
22
20
20
W
7.0
8.0
10.2
10.2
H
95
115
115
115
‘h’
CGE50/100
*Lengths of 2250mm & 2550mm not available.
CGE50/125
L
9001500
18002100
60
2400
48
125
2700
SWL
25
25
25
25
W
8.3
9.3
11.9
11.9
H
115
140
140
140
‘h’
CGE50/125
CGE90/100
L
7501500
18002100
60
2400
88
100
2700
SWL
25
22
20
20
W
7.7
8.3
10.7
10.7
H
95
115
115
115
‘h’
CGE90/100
CGE90/125
L
9001500
18002100
60
2400
SWL
25
25
25
25
W
8.8
9.7
11.7
11.7
H
115
140
140
140
W Weight (kg/m)
88
125
2700
‘h’
CGE90/125
SWL (kN)
* To achieve the stated safe working load (SWL), closed eaves lintels must be built in
with solid blockwork and continuous timber wall-plates. Allow 150mm at each end
for bearing support. Standard lengths are available in increments of 150mm, except
for 2250mm & 2550mm.
Lintel Pocket Guide
23
Closed Eaves
For 50-75mm Cavity
Classic Box
100mm Inner Leaf
Typical applications
• Universal application caters for all loading conditions
• Direct roof loading
• Supports point loads e.g. multiple trusses
CN55A
9001500
L
CN55C
16502100
22502700
9001500
16502100
22502700
SWL
30
25
20
50
40
30
W
9.0
9.0
9.0
12.8
12.8
12.8
H
143
143
143
143
143
143
Standard lengths are available in increments of 150mm.
W Weight (kg/m)
Eaves Lintel
24
Lintel Pocket Guide
SWL (kN)
Catnic Cavity Wall ‘CXL’ Fabricated
Lintels
A range of lintels designed for use in
cavity wall construction for extreme
loading conditions.
Lintel Pocket Guide
25
CXL Lintels
Lintels for extreme loads
Designed for external cavity walls
when extreme loads are imposed.
Longer spans
High loads at longer spans.
Varying widths
Suits a variety of wall widths –
with special widths on application.
Material used
Supplied in post galvanised finish.
Lintels manufactured from a universal
beam section and 6.0mm structural
grade steel plate Grade S275 to
BSEN 10025:1993 and hot dip
galvanised after manufacture to
BSEN ISO1461:1999.
As an optional extra, CXL lintels can
be supplied with expanded metal
mesh secured to the base plate.
Standard increment lengths
Overall lengths are available in
150mm increments for lengths up to
3000mm, and in 300mm increments
for lengths from 3000mm to 6600mm
(excluding 4500mm). For longer
lengths to support heavy loads,
please refer to our Technical Services
Department on 029 2033 7900.
Applications
Lintel
Outer
Codes
Leaf
CXL240
102
CXL265
102
CXL265
102
CXL290
102
CXL290
102
Cavity
Load ratios
To achieve the loading figures shown,
the lintel must be laterally restrained
and have 200mm end bearing
supports and inner to outer load
ratios beween 1:5 and 1.19.
Separate DPC
A separate flexible DPC must be
installed during construction.
Inner
Leaf
100-115
125-140
100-115
125-140
100-115
50
50
70
70
90
Note: For other cavity wall constructions please
contact our Technical Services Department on
029 2033 7900.
133
133
6
213
6
26
133
6
6
213
6
6
234
259
240
265
290
CXL240
CXL265
CXL290
Lintel Pocket Guide
284
213
For 50mm Cavity
Cavity Walls
CXL240
L
21003000
33004800
5100
5400
5700
6000
6300
6600
SWL
88
83
78
71
64
56
52
47
W
41.1
41.1
41.1
41.1
41.1
41.1
41.1
41.1
H
213
213
213
213
213
213
213
213
lxx
4051
4051
4051
4051
4051
4051
4051
4051
Zxx
303
303
303
303
303
303
303
303
SM
50
50
50
50
50
50
50
50
AR
68
68
68
68
68
68
68
68
5700
6000
6300
6600
For 70mm Cavity
For 50mm Cavity
CXL265
L
21003000
33004800
5100
5400
SWL
88
83
78
71
64
56
52
47
W
42.3
42.3
42.3
42.3
42.3
42.3
42.3
42.3
H
213
213
213
213
213
213
213
213
lxx
4139
4139
4139
4139
4139
4139
4139
4139
Zxx
305
305
305
305
305
305
305
305
SM
50.3
50.3
50.3
50.3
50.3
50.3
50.3
50.3
AR
68
68
68
68
68
68
68
68
5700
6000
6300
6600
For 90mm Cavity
For 70mm Cavity
CXL290
L
21003000
33004800
5100
5400
SWL
88
83
78
71
64
56
52
47
W
43.5
43.5
43.5
43.5
43.5
43.5
43.5
43.5
H
213
213
213
213
213
213
213
213
lxx
4222
4222
4222
4222
4222
4222
4222
4222
Zxx
307
307
307
307
307
307
307
307
SM
50.6
50.6
50.6
50.6
50.6
50.6
50.6
50.6
AR
68
68
68
68
68
68
68
68
SWL SWL 1:5/1:19 (kN) W Weight (kg/m)
Ixx (cm4)
Zxx (cm3)
SM Serviceability Moment (kNm) AR Allowable Reaction (kN)
Standard lengths are available in increments of 150mm at lengths up to 3000mm, 300mm at
lengths from 3000mm – 6600mm (excluding 4500mm). The SWL (safe working load) is based
on the total UDL (uniform distributed load) over maximum span using 200mm end bearings.
Lintel Pocket Guide
27
Timber Frame Lintels
The Catnic lintel range for use in
timber frame construction consists
of single and double element lintels
with a sloping outer face and Duplex
corrosion protection which together
provide a built-in DPC.
28
Lintel Pocket Guide
Catnic Timber Frame Lintels
Ensures optimum durability.
Restraint clips
Allows vertical differential movement
of timber frame.
Accessories
44-46).
Isometric view of a typical application showing
lintel over window.
Screw fixing
Nail fixing
Screw or nail fixings
(refer to table for
usage)
Clearance
Clearance
Overall lintel length
300
max
600
max
600
max
300
max
Centre of lintel
Position of lintel
restraint clips
Lintel restraint clips – installation details
Lintels for timber frame construction are supplied with lintel restraint clips (free of
charge), which must be screw or nail fixed to the timber frame, as shown here, to
allow for differential movement between the timber structure and the brick facing.
Note: lintels should be suitably propped during construction in accordance with
NHBC guidelines.
Lintel code
Length (mm)
Clip fixings
CTF5
750-3600
50mm x 3.35mm diameter
plain head galvanised nails
CTF5
3900-4800
CTF7
750-4800
38mm x No10 RD/HD
sherardised wood screws
38mm x No10
RD/HD sherardised wood screws
CN23
Up to 4800
38mm x No10 RD/HD
sherardised wood screws
Length (mm)
Number of clips
Up to 1800
3
1950-3000
5
3300-4200
7
4575-4800
9
Lintel Pocket Guide
29
Cavity Walls
For 102mm Outer Leaf
Timber Frame Inner Leaf
50-60mm Cavity
CTF5
7501200
L
13501500
16502400
25503000
33003600
39004800
SWL
4
5
7
7
9
10
W
3.8
4.8
5.6
7.2
8.0
9.0
H
128
128
183
183
218
256
lxx
82.0
102.8
260.7
332.4
533.7
823.8
Zxx
9.4
11.6
21.5
27.5
38.1
51.5
SM
1.5
1.9
3.5
4.4
6.2
8.3
Lintel type CTF7 to suit 70-80mm cavities are available on request.
For 102mm Outer Leaf
CN23B
CN23C
7503600
L
35-60mm Cavity
39004800
SWL
10
10
W
12.8
16.3
H
268
268
lxx
1210
1521
Zxx
70
89
SM
11
14
SWL Safe Working Load W Weight (kg/m)
Ixx (cm4)
Zxx (cm3)
300mm at lengths from 3000mm – 4800mm.
95
47
95
38
h
h
CTF5 Lintel
30
Lintel Pocket Guide
CN23 Lintel
The Catnic lintel for external solid
walls comes in three forms, a single
element lintel designed to carry a
single leaf of brickwork, a two-piece
lintel shaped to carry the two
separate leaves of a 215mm fairface
brick wall and a box profile with a
toe for use in solid brick or block
walls 200mm to 215mm thick.
Lintel Pocket Guide
31
Integral insulation
Maximising thermal efficiency.
Staggered slots
Minimises cold bridging.
Ensuring optimum durability.
Integral plaster key
Ensures excellent plaster adhesion
and safety on site.
Savings on brickwork and
insulation
Due to box profile savings can be
made.
Box section
Resists twisting during construction.
Instant full load use
Profile is designed to carry full load
of wet masonry as soon as it is
installed.
Isometric view of a typical application
showing lintel profile in external solid wall.
For solid wall construction
of 250mm and above an
appropriate Cougar Open
Back Lintel can be utilised
Please refer to page 7-13 for the
appropriate lintel profile.
CG Lintel installed in
solid wall construction
32
Lintel Pocket Guide
For 200 & 215mm Exterior Solid Walls
CN71A
L
7501500
CN71C
16502100
22502700
9001500
1650
1950
SWL
29
27
20
49
44
W
9.3
9.3
9.3
14.6
14.6
H
143
143
143
143
143
lxx
378
378
378
593
593
Zxx
46
46
46
75
75
SM
7.5
7.5
7.5
12.2
12.2
3600
39004575
CN81B
L
CN81C
21003600
22502700
28503300
4800
SWL
29
54
47
39
29
26
W
15.1
18.5
18.5
18.5
18.5
18.5
H
219
219
219
219
219
219
lxx
1309
1601
1601
1601
1601
1601
Zxx
107
134
134
134
134
134
SM
17.4
21.8
21.8
21.8
21.8
21.8
Zxx (cm3)
Ixx (cm4)
lengths from 3000mm – 4800mm (including 4575mm, but excluding 4500mm). The SWL (safe
working load) is based on the total UDL (uniform distributed load) over maximum span using
150mm end bearings.
95
100
h
CN81 Lintel
External Solid Wall CN71 Lintel
Lintel Pocket Guide
33
For 102 & 215mm Exterior Solid Walls
L
CN48C
CN49C
7501800
19502700
SWL
15
20
W
7.5
9.3
H
154
229
898
lxx
355
Zxx
40
70
SM
6.5
11.3
100 55
h
CN48 Lintel
Lintels CN48 and CN49 should be suitably propped and laterally restrained during
construction in accordance with NHBC guidelines. To achieve loading figures, lintels
must be constructed with brickwork (blockwork) fully built-in as shown.
CNZ94A CNZ94C CNZ95C CNZ96C CNZ97C
600750
L
9001500
16502100
22502400
91
25502700
SWL
8
5
7
10
15
W
2.7
4.4
5.4
6.3
7.5
H
88
91
131
167
215
lxx
27.4
44
123
239
476
Zxx
4.1
7.0
13.0
21.0
34.0
SM
0.7
1.0
2.1
3.4
5.5
h
CNZ96 Lintel
Lintels CNZ94, CNZ95, CNZ96 and CNZ97 should be suitably propped and laterally
restrained during construction in accordance with NHBC guidelines. Profile CNZ94A
is designed for use over meter boxes only.
L
CN50C
CN51C
7501800
19502700
SWL
10
12
W
9.0
12.7
H
91
167
476
lxx
95
Zxx
14
43
SM
2.31
6.99
182
h
CN51 Lintel
Standard lengths are available in
increments of 150mm.
Ixx (cm4)
Zxx (cm3)
34
Lintel Pocket Guide
Catnic lintels for internal partitions
and loadbearing walls are available
in either corrugated, channel or
box section depending on load and
opening.
Lintel Pocket Guide
35
CN92 & CN102
• Suitable for nominal domestic
loading
CN100
As above plus:
• Suitable for masonry and timber
floor loads
Note: 1800 and 2100mm lengths
are not suitable for floor loads
CN5X & CN6X
As above plus:
• Universal application caters for all
loading conditions
• Direct floor or roof load
• Supports concrete floor loads
• Supports point loads eg. steel
beams, etc.
• Optional 4 course profile for high
loads at extended lengths
CN56X & CN66X
As above plus:
• Suitable for 140mm and 150mm
blockwork
Isometric view of a typical
application showing box
profile lintel in 100mm wall.
Corrugated and channel lintels
Offer a cost effective solution for
lightweight and standard duty loads.
Use corrugated galvanised steel
lintels for lightweight structures and
channel section lintels for light
loadings, made from galvanised steel
with additional polyester powder
coating.
Box profiles
Sized to suit brick or block course
heights. Use box profiles for heavier
loads and wider openings,
manufactured from galvanised steel
with additional polyester powder
coating.
longevity.
Plaster/mortar keys
Incorporated in all lintels.
75
100
103 (inside)
h
25
CN92 Lintel
25
CN102 Lintel
CN100 Lintel
36
Lintel Pocket Guide
For 75 & 100mm Interior Solid Walls
CN92
L
CN102
10501200
10501200
SWL
7
7
W
1.2
1.8
Note: When using CN92 and CN102 lintels normal building practice should be
observed, in that one course of blockwork should be laid on the lintel and the mortar
allowed to harden for at least 24 hours before additional loads are applied.
For 100mm Interior Solid Walls
CN100
L
10501200
13501500
18002100*
SWL
10
13
3
W
4.7
5.9
4.7
H
50
73
50
*Not suitable for floor loads
For 100mm Interior Solid Walls
CN5XA
L
7501500
CN5XC
16502100
22502700
7501500
16501950
SWL
29
25
20
49
39
W
7.6
7.6
7.6
12.3
12.3
H
143
143
143
143
143
lxx
277
277
277
452
452
Zxx
39
39
39
59
59
SM
6.3
6.3
6.3
9.6
9.6
3600
39004575
CN6XB
L
21003600
CN6XC
22502700
28503300
4800
SWL
29
49
39
34
29
26
W
12.4
15.7
15.7
15.7
15.7
15.7
H
219
219
219
219
219
219
lxx
904
1159
1159
1159
1159
1159
Zxx
78
100
100
100
100
100
SM
12.7
16.3
16.3
16.3
16.3
16.3
Ixx (cm4)
Zxx (cm3)
150mm end bearings.
Lintel Pocket Guide
37
For 140-150mm Interior Solid Walls
CN56XA
10501500
L
16502700
SWL
29
20
W
9.0
9.0
H
143
143
lxx
303
303
Zxx
43
43
SM
6.9
6.9
CN66XC
16502700
L
28503300
3600
39004575
4800
SWL
54
47
39
29
26
W
18.0
18.0
18.0
18.0
18.0
H
219
219
219
219
219
lxx
1507
1507
1507
1507
1507
Zxx
127
127
127
127
127
SM
20.6
20.6
20.6
20.6
20.6
Ixx (cm4)
Zxx (cm3)
150mm end bearings.
140
140
h
h
CN56X Lintel over door opening
38
Lintel Pocket Guide
CN5X Lintel supporting first floor
partition
Feature Lintels
When buildings require a more
unconventional support solution,
Catnic have the expertise to design
and manufacture special and
fabricated lintels to suit a variety of
shapes and sizes. These include
both the standard and bespoke
fabricated arch lintel ranges for the
use in more creative openings.
Lintel Pocket Guide
39
Standard Arch Lintels
Lintel features
Catnic standard arch lintels are fabricated quickly and economically by a unique
specialised production facility, and can be delivered to site along with the
standard lintels, thus avoiding delays to the construction programme.
Isometric view of a typical application showing
semi-circular arched lintel in facing brickwork.
150
150
150
150
Clear Span
Clear Span
150
245
Lintel Type
285
Clear
Span (mm)
Weight
(kg)
CCA/600
600
11.79
CCA/630
630
12.26
CCA/900
900
CCA/915
CCA/1200
Clear
Span (mm)
Weight
(kg)
CCB/600
600
12.96
CCB/630
630
13.47
16.53
CCB/900
900
18.14
915
16.77
CCB/915
915
18.40
1200
21.37
CCB/1200
1200
23.43
Application
20mm maximum
overhang
3
102
102
150
Lintel Type
Application
20mm maximum
overhang
3
50-85
50-65
102
115-125
20mm maximum
overhang
3 Leaf
Outer
102
102
3
60-100
50-85
20mm maximum
overhang
Inner Leaf
102
115-125
Standard semi-circular arches available for domestic housing applications.
For alternative cavity and masonry widths, please contact our Technical Services
Department.
40
Lintel Pocket Guide
Fabricated Arch Lintels
Lintel features
Although the majority of fabricated
lintels are semicircular for use over
bullseye or semicircular windows,
Catnic also offers segmental gothic
arches, and apex designs. There are
limitless variations of sizes and styles
available and Catnic are able to
provide the technical experience and
manufacturing knowledge. The only
constraint is the architects imagination.
Semicircular arch
Semicircular arch
H
E
R
A
B
E
C
Cavity wall construction
Semicircular arch
with upstands
Semicircular arch
with upstands
H
Outer Leaf
Cavity
E
R
Inner Leaf
A
Typically, end bearings are 200mm
D
B
E
C
Section design required
Outside
Outside
Segmental arch
B
E
C
Dim
B
Dim
C
H
Segmental arch
E
Dim C
Traditional cavity wall
application
A
Single leaf support
application
B
E
C
The illustrations opposite are for
guidance only. To ensure the lintel
design meets the application, the
following information will be required:
•
•
•
Dimensions as illustrations
opposite
Wall constructions
All plans, sections and elevations
(where possible)
Apex arch
H
Apex arch
E
A
NOTE: As part of Catnic’s ISO 9002
Quality Procedure, manufacture of
fabricated lintels will not commence
without a signed (approved) copy of
our drawing(s) returned to our
Technical Services Department.
B
C
E
Lintel Pocket Guide
41
Fabricated Corner or Bay Lintels
Lintel features
Indicated below are examples of the
more popular mitred lintels available
from Catnic. Whatever your
requirement our Technical Services
Department will be able to advise on
the best possible solution.
Corner Lintel CU
Bay Window Lintel CU
Splayed Bay Lintel CU
Curved Lintel
The above illustrations are for
guidance only. To ensure the lintel
design meets the application,
the following information will be
required:
•
•
•
•
Clear opening dimensions
Wall constructions
All plans, sections and elevations
(where possible)
Plaster key requirements (internal
and external)
NOTE: As part of Catnic’s ISO 9002
Quality Procedure, manufacture of
fabricated lintels will not commence
without a signed (approved) copy of
our drawing(s) returned to our
Technical Services Department.
42
Lintel Pocket Guide
Accessories
A range of accessories including
ArchCentres, Stop Ends, Cavity
Weep Vents and Soffit Cladding
to complement your specific lintel
requirements.
Lintel Pocket Guide
43
Lintel ArchCentres – Type AC
For the construction of segmental
arches in brickwork.
A vacuum formed arch unit for use
over openings in external cavity walls –
traditional and timber frame –
providing permanent centering for
brick arch construction.
underside of the ArchCentre has selfadhesive pads fitted for ease of
installation and incorporates a
minimum of 2 built-in weep vents. For
longer length spans additional weep
vents are included, at maximum
spacings of 900mm.
Made under licence British Patent
No. 2063953.
Important note
If used with Catnic soffit cladding,
the straight ends of the ArchCentre
(see cross-hatching on illustration,
left), which extend beyond the
structural opening, should be
removed before proceeding to stage
vi. This operation can also be carried
out to avoid exposing the drip edge
of the ArchCentre within the mortar
joint at the bearing end. Cutting into
the main body of the ArchCentre
should not be carried out.
•
•
•
•
Allows easy construction of
segmental arches
Includes integral weep vent
Includes a full-fill insulation core
for strength and rigidity
The only Archformer to comply to
NHBC with integral weep vents
Material
Vacuum formed from gloss white ASA
(Acrylic Styrene Acrylontride) with a
high density polystyrene core. The
ArchCentre Length
ArchCentre Span
37.5mm
ArchCentre Span
ArchCentre
Length
37.5mm
ACA – 75mm
ACB – 150mm
Isometric view of Lintel ArchCentre
ArchCentre
Code
ACA0475
ACA0625
ACA0925
ACA1050
ACA1225
ACA1350
ACA1485
ACA1625
ACA1700
ACA1785
ACB1975*
ACB2125*
ACA2250*
ACB2325*
ACB2425*
ArchCentre
Span (mm)
475
625
925
1050
1225
1350
1485
1625
1700
1785
1975
2125
2250
2325
2425
Structural
Opening (mm)
450-500
600-650
900-950
1025-1075
1200-1250
1325-1375
1460-1510
1600-1650
1675-1725
1760-1810
1950-2000
2100-2150
2225-2275
2300-2350
2400-2450
Rise (mm)
CAD Code
75
75
75
75
75
75
75
75
75
75
150
150
75
150
150
ACA0475
ACA0625
ACA0925
ACA1050
ACA1225
ACA1350
ACA1485
ACA1625
ACA1700
ACA1785
ACB1975
ACB2125
ACA2250
ACB2325
ACB2425
Note: *Incorporate a solid base plate
Special ArchCentres available – for details please call our Technical Services
Department on 029 2033 7900
44
Lintel Pocket Guide
Installation notes
i) Do not use damaged ArchCentres, refer to ArchCentre Installation Leaflet.
ii) Ensure the lintel is adequately bedded-in at supports, and is parallel to the wall face.
iii) Ensure the ArchCentre and lintel mounting surfaces are clean and dry.
iv) Check that the ArchCentre is correct for application (Refer to the code identification
on the underside of the arch unit, and to the lintel specification).
v) Remove the ArchCentre from its protective wrapping.
vi) Locate the unit centrally over the opening to determine the position on the lintel.
The front drip section should be trimmed off at the bearing end to allow for thin
mortar joints and to enhance the appearance.
vii) Remove the backing from the self-adhesive tape and locate the unit against the
toe of the lintel at a position previously determined, and rotate onto the lintel.
viii) Apply downward pressure to ensure full contact of the self-adhesive tape.
Lintel Stop Ends – Type
CL3 and C90
For eliminating problems associated
with moisture penetration.
Wind-driven rain that penetrates the
external skin of a cavity wall will, under
normal conditions, discharge off the
ends of conventional lintels. However,
with full fill cavity insulation, and in
areas of severe exposure, large volumes
of water can be released from lintel
ends into and through insulation,
creating dampness at internal reveals.
Catnic Stop Ends prevent this problem.
Use CL3 Stop Ends (see Figure 1) for
lintels with a fully inclined face within
the cavity.
Figure 1:
Lintel Stop End
type CL3 for use
with combined
lintels or CU
lintels
Use C90 Stop Ends (see Figure 2) for all
lintels with a 90˚ brickwork/ blockwork
support flange.
Technical requirements
NHBC Standards: Where fair faced
masonry is supported by lintels: cavity
trays or combined lintels should have
Stop Ends.
Material
Durrpolyethylene 6/A for type CL3.
BS polypropylene for type C90.
Installation notes
i) Ensure the lintel surface is clean
and dry.
ii) Remove the protective covering to
the length of the anchoring strip on
the bottom of the Stop Ends.
iii) Position to suit the perpendicular
joint nearest the lintel ends,
ensuring that the base and back of
the Stop End fit snugly into the
front upstand of the lintel face.
Figure 2:
Lintel Stop End
type C90 for use
with CG or CGH
lintels and
external solid
lintels
Important note
Cavity weep holes should be provided
over all lintels fitted with Stop Ends.
Stop Ends type CL3 can be applied
to lintels designed for cavity wall
construction with a maximum 100mm
cavity, although they will suit cavities
up to 150mm wide, providing the lintel
upstand rises to 225mm.
Zurich Municipal: To prevent water
running into the adjacent cavity, cavity
trays should have 75mm deep Stop
Ends located to coincide with the
perpend nearest to the end of the
cavity tray.
Lintel Pocket Guide
45
Cavity Weep Vents –
Type WV
Lintel Soffit Cladding –
Type RC and FC
For ensuring removal of water from
cavities.
DPC and cavity tray installations over
openings require weeps to discharge
collected water from the cavity above.
Cavity Weep Vents also assist in
draining interstitial condensation,
which can contribute to moisture
tracking across the cavity. The design
of Cavity Weep Vents type WV also
provides an aesthetically pleasing
solution, as the front face of the Weep
Vent blends unobtrusively into the
masonry (see figure 3).
For improved appearance
An optional cladding, particularly
suitable for use with PVC-U windows.
The cladding was originally designed
to give a more aesthetically pleasing
appearance to rebated combined box
lintels (see Figure 4). These
advantages have now been extended
to cover all flush soffit lintels (see
Figure 5).
Figure 3:
Cavity Weep
Vent
type WV
available in
terracotta,
beige and grey
Technical requirements
NHBC Standards 1995: Where fair
faced masonry is supported by lintels:
weep holes should be provided at
maximum 450mm intervals. Each
opening should have at least two weep
holes.
Zurich Municipal: In localities of
moderate exposure or worse, or where
full cavity fill is used, cavity trays
should be adequately drained through
weep holes spaced at no more than 1
metre apart, with at least 2 per
opening.
For improved protection
Lintel Soffit Cladding also provides
extra protection, especially in coastal
regions, and in situations where much
of the lintel soffit is exposed.
Material
A PVC-U pre-cut unit, supplied in
white or brown. Special colours are
available on request.
Important note
All external wall lintels fitted with
lintel cladding must be installed with
a flexible damp proof course (DPC)
ensuring that the DPC projects
beyond the front face of the cladding.
98 mm
98mm
Material
BS Polypropylene in grey and beige,
to match mortar.
Important note
Cavity weep holes should be provided
over all lintels fitted with stop ends.
Installation notes
i) Position in the perpendicular brick
joints directly above the lintel.
ii) Use a minimum of 2 per lintel at
450mm maximum centres.
46
Lintel Pocket Guide
108 mm
108mm
Figure 4:
Lintel Soffit
Cladding
type RC
Figure 5:
Lintel Soffit
Cladding
type FC
Where to use a separate DPC
Domoch
Lerwick
Inverness
Aberdeen
Perth
Dundee
Stirling
Glasgow
Dunbar
Edinburgh
Ayr
Londonderry
Stranraer
Newcastle
Carlisle
Enniskillen
Belfast
Alston
Workington
Middlesborough
Dungannon
Darlington
Whitby
Ripon
York
Hebben Bridge
Hull
Skelmersdale
Colwyn Bay
Exposure Approximate wind
zones
driven rain
(litres/m2 per spell)
Bangor
Manchester
Chester
Bala
Stafford
Shrewsbury
Llanidloes
1
Less than 33
2
33 to less than 56.5
3
56.5 to less than 100
4
100 or more
To satisfy NHBC and Zurich
Municipal technical requirements,
Catnic lintels only require a
separate DPC in severe exposure
zones i.e. zones 3 & 4 of the map
and as determined by BS 8104.
NHBC Amendments Oct 1992 require
a separate damp proof protection for
all lintels in Scotland, Northen
Ireland, the Isle of Man and in areas
of severe or very severe exposure to
driving rain, as defined under BS
5628 Part 3. The map indicates
typical exposure categories.
In such cases, a cavity tray/damp
proof protection should provide an
impervious barrier draining water
outwards. It should have an overall
minimum upstand of 140mm,
returned to the inner leaf masonry,
and be so shaped that there is not
less than 100mm vertical protection
above a point where mortar could
collect.
Doncaster
Sheffield
Macclesfield
Birmingham
Grimsby
Lincoln
Skegness
Nottingham
Leicester
Norwich
Peterborough
Llandrindod Wells
Cambridge
Northampton
Hay-on-Wye
Brecon
Colchester
Gloucester Luton
Swansea
Welwyn Garden City
Swindon
Newbury
London
Bristol
Cardiff
Staines
Weston-super-Mare
Barnstaple
Watchet
Taunton
Exeter Sidmouth
Aldershot
Gatwick
Southampton
Poole
Brighton
Dover
Eastbourne
Where exposure conditions or local
building regulations demand a
separate DPC, Catnic cavity wall lintels
not only provide additional protection
against the elements but also act as
a support and template for the DPC,
making it easier to install, and with
less risk of damage. The DPC should
project at least 25mm beyond the
outer face of the cavity closer and
vertical DPC. It should provide drip
protection for the door and window
heads, and cover the ends of the
lintel to ensure moisture is shed clear
of the reveals. For all coastal site
applications where the soffit of the
lintel is exposed, the use of a soffit
cladding in conjunction with a
separate DPC is recommended to
improve appearance and extend
normal maintenance periods.
Reproduced from BRE report Thermal
Insulation: avoiding risks by
permission of the Controller of HMSO:
Crown Copyright. Report available
from CRC Ltd 020 7505 6622.
Lintel Pocket Guide
47
Technical Information
Structural Performance
Thermal Performance
The structural data published in the
loading tables included in this technical
guide, was achieved in accordance with
the requirements of BS 5977: Part 2.
Extensive testing was undertaken at
the following test houses:
All Catnic cavity wall lintels contribute
to the thermal integrity of the building
as they are supplied with an insulated
core. The core of the ‘Cougar Open
Back’ style lintels is fully filled with
CFC free insulation to prevent
cold voids.
•
•
•
The University of Wales, School
of Engineering
The University of Glamorgan,
Construction Centre
Ceram Building Technology,
Stoke-on-Trent
Safe working loads, as defined by
BS 5977: Part 2 for cavity wall lintels
refer to uniform distributed loads
applied in the inner to outer leaf ratios:
•
•
•
1:1 For lintels supporting masonry
only
1:3 For lintels normally carrying
timber floors
1:5 For lintels normally carrying
concrete floors
The CU lintel range refers to uniformly
distributed loads in the ratio of 1:19
when non standard or unusual loading
conditions occur. A lintel should not
exceed a max vertical deflection of
0.003 x the effective span (effective
span = distance between centre of
bearings) when subjected to the safe
working load (SWL).
Fire Tests
Catnic lintels have been tested in
accordance with the relevant parts of
BS476, Methods of Determination of
the Fire Resistance of Loadbearing
Elements of Construction. Details of
the test results can be found in TRADA
(Timber Research and Development
Association) Nos. FR254, 275, 659,
863, 1662 and RF94015 and FROSI
(Fire Research Organisation) No. 5001.
Also, because Catnic cavity wall
lintels are shaped to form a built-in
damp proof course, partial fill cavity
insulation can extend down to the
top of the lintel. This means that the
cold voids normally associated with
separate damp proof courses are
avoided, without the need to install
specially shaped insulation batts
behind the DPC.
To achieve the full benefits of a Cougar
open back or Classic combined box
lintel in accordance with the ‘robust
details’ as referred in the approved
documents: Part L1 and Part L2, the
window frame should be positioned
so that the back face of the frame
overlaps the inner face of the outer
leaf of the cavity wall by a minimum of
30mm.
The standard range of cavity wall lintels
incorporating perforated base plates
have been designed to minimise any
potential cold bridge path without
compromising its structural integrity.
The unique slotted base plate design
on the underside of the lintels provides
an effective conductivity not exceeding
30W/mK which satisfies the
requirements of the approved
document to support Part L1 & L2
2002 edition.
Health and Safety
•
•
•
•
•
48
When handling product, consider
size and weight.
Gloves should be worn to avoid
injury.
Do not use damaged goods.
All products should be stored in a
clean, dry and level environment.
Welding, burning, cutting or
grinding can result in vaporising
Lintel Pocket Guide
•
•
the metal or generating airborne
particles that may be hazardous.
When disposing of any
product/packaging, consideration
must be given to the impact on the
environment.
All products are considered nonhazardous to health under normal
conditions of use (COSHH 1994)
Technical Specification
‘Cougar Open Back’ Styles
CG and CGH ranges
The lintels are manufactured from
galvanised steel to BS EN 10142: 2000
(continuously hot-dip zinc coated low
carbon steel sheet and strip for cold
forming: technical delivery conditions)
of grade DX51D & Z275, but with a
minimum yield stress of 250N/mm2.
The lintels are further protected against
corrosion by a black coloured polyester
resin coating applied to all external
surfaces of the lintels. The lintels are
fully insulated with expanded
polystyrene bead of density 18kg/m3
giving a thermal conductivity of
between 0.031W/mK and 0.36W/mK.
CU Range
galvanised steel to BS EN10142: 2000
of grade DX51D+Z275 with a minimum
yield stress of 250N/mm2. The lintels are
further protected against corrosion by a
black coloured polyester resin coating
applied to all external surfaces of the
lintels.The lintels are fully insulated with
expanded polystyrene board
manufactured in accordance with BS
3837: Part 1: 1986 (Expanded
polystyrene boards specification for
boards manufactured from expandable
beads). The material is CFC free and
has an ozone depletion potential (ODP)
of zero. The CU range can also be
supplied with a hot dip galvanised finish
after manufacture to BS EN ISO1461:
1999. At ordering stage ensure that a
suffix ‘PG’ is included within the lintel
code reference, ie. CU50/100PG.
To satisfy the corrosion protection system
of BS 5977: Part 2 and NHBC technical
requirements, lintels galvanised to BS
EN ISO1461: 1999 must be installed
with a separate damp proof course.
Classic Combined
Box/External Solid Wall/
Internal and Timber
Frame Styles
CN and CTF range
galvanised steel to BS 10142: 2000
of grade DX51D & Z275 but with a
The lintels (excluding internal lintels
CN92 and CN102) are further protected
against corrosion by a polyester resin
coating applied to all external surfaces
of the lintel. The lintels are insulated
(where applicable) with expanded
polystyrene board to BS 3837 Part 1:
1986 (expanded polystyrene boards –
specification for boards manufactured
from expandable beads).
CNZ range
galvanised steel to BS 10142: 2000
of grade DX51D & Z600 but with a
All external lintel cut edges are treated
with a corrosion resistant paint.
Quality Assurance
Technical Conformity
Complies with the technical
requirements of:
• National House-Building Council (NHBC)
• Housing Association Property Mutual
(HAPM), with appropriate adjustment
factors.
• Zurich Municipal
Catnic’s excellence is internationally recognised.
Certificate No. FM 14913
BS EN ISO 9002: 1994
BS 5977
Licence No. KM07234
British and European Standards
Catnic lintels are designed to satisfy
BS 5977: Part 2: 1983 and are
manufactured from pre-galvanised steel
in accordance with BS EN 10142: 2000
with or without applied polyester
powder coated finish. The majority of
Catnic’s lintels are covered by a BSI
Kitemark licence or by British Board of
Agreement Certification.
Lintel Pocket Guide
49
www.catnic.com
Catnic is a Corus Group company.
Further Information can be found on the
Corus website at www.corusgroup.com
Copyright 2003
Corus
Designed by Seven 029 2037 0960
Catnic
PO Box 43
Caerphilly
CF83 2XH
Telephone 029 2033 7900
Facsimile 029 2086 7796
C03:30000:UK:06/2003
2632/02

Lintel Pocket Guide - Avenue Baptist Church

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