Platform Assembly Overview Layout Plan View

Transcription

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Platform Assembly Overview
21’ Rainier Yurt – General Purpose PLYWOOD decking
Rainier Industries offers a choice of 2 types of platforms. The general-purpose version is commonly
used for temporary installations. Drawings for platforms requiring structural engineering are
available through your Rainier Yurt representative.
Layout Plan View / Beams & Blocks only
This plan set illustrates the construction of the general-purpose platform. It starts with the layout of
the pier-blocks (footings), the installation of the support beams, the installation of the decking and
general construction details to add clarity.
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2
Pier-Block Layout
1) Locate and level the footings as shown. Be sure the cradles are all at the same height.
The illustration above assumes a level site. For sloped sites, the layout will be similar but vertical
support posts and diagonal bracing will be required to compensate for changes in elevation. See
the last 2 pages for illustrations showing how to adapt this layout to a sloped site.
Note – Poured concrete footings can be substituted for pier-blocks. Site and soil conditions will
dictate the footing size. If substantial footings are poured, tie-down anchors will not be necessary.

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3
4x6 Joists and Blocking added to Pier-Blocks
2) Cut the 4x6 beams to the lengths indicated on the Layout Plan View drawing and place them in
the cradles of the pier-blocks.
- Confirm that the centers of the beams are 4’-0” center-to-center.
- Secure the beams to pier blocks as necessary
3) Cut the 2x6 Blocking boards to fit and secure them to the beams (as illustrated)
- Pre-drill and screw through the ends of the 2x6 blocking into the 4x6 beams
Note – If your plans include Tie-down anchors, they should be installed after the beams and
blocking are complete but before the decking is installed. See the illustration on page 7. Rainier
recommends that all platforms be anchored.

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4
Illustration of 4’x8’ Tongue & Groove (T&G) Plywood Decking
Note – The 21-foot platform is decked with (14) 4’-0” x 8’-0” Tongue & Groove Plywood. Use the
layout provided on the next page to install the T&G plywood. Rainier also provides a
separate plan for those who wish to use 2” x 6” T&G decking. See www.rainieryurts.com
4) Secure the T&G plywood sheets to the Beams and Perimeter Blocking.
5) Make a compass with a board or string,
- Use a nail at the center of the platform and a pencil to mark the perimeter
- The radius for the cut will be 10’-4 7/16” (124 7/16”)
6) Cut outside the newly scribed circle (10’-4 7/16”) (diameter 20’-8 7/8”)
7) Screw the 2x6 Tex® “Banding Board” to the blocking and beams where intersections occur.
Also screw straight down through the plywood into the 2x6 banding board every 6” all the way
around the platform.

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5
Layout of 4’x8’ Tongue & Groove (T&G) Plywood

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6
Bill of Materials - T&G Plywood
Worksheet
Use
Floor Beams
4" x 6"
Size
Quantity
Floor Decking
#2 or Btr / Framing
Spec.
Length
Blocking
2" x 6"
8' - 0" 10' - 0" 12' - 0" 8' - 0" 10' - 0"
0
4
4
4
4
Banding
1 1/8" x 4' x 8'
T&G Plywood
Trexy
4' x 8' T&G
2" x 6"
Trex
8' - 0"
10' - 0"
14
6
Screws
Pier
Blocks
Galv.
(outdoor
use)
with
CradleBracket
#8
3"
15
15#
$ Each
Total $
The Bill of Materials represents the minimum quantity of lumber and hardware necessary to
construct the platform on a level site. For sloped sites you will need to add posts and diagonal
braces. See the concept drawing on pages 9 & 10.
Rainier recommends that all platforms be anchored. Yurt size, platform height, exposure to
prevailing winds, soil conditions, site topography and other conditions will affect the type and
quantity of anchors. For that reason anchors are not on this B.O.M. but should be included
when supplies are priced and purchased.
This B.O.M. is provided as a convenience to assist our customers with determining the cost of
their platform. The format allows it to be used as a shopping list. Prices and types of lumber
vary by region and supplier. Work with your local building center to establish prices.
Note – The B.O.M. includes screws to secure the T&G decking to the beams. Nails can be
substituted for the T&G but screws should be used to secure the 2x6 Banding Board.

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7
Detail 1 / Platform Framing - Plan View
Detail 2 / Platform with T&G Plywood–Plan View
Detail 3 / Platform Framing & Anchoring – Section View

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8
General Elevation View – Level Site
A deck is shown in the view above. Rainier Yurts can provide drawings for several types of
entry decks. Contact your Rainier Yurt representative for more information.

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9
Note – Bracing requirements
will vary depending on the
slope of the site, height of the
platform, desired load capacity
and other factors. Consult a
building professional or your
Rainier Yurt representative
if you have questions about
the type and quantity of braces
appropriate for your
platform installation.
Joists, Blocking & Pier Blocks with Bracing – Sloped Site
General Perspective – Sloped Site

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10
General Elevation View (Side) – Sloped Site
General Elevation View (Front) – Sloped Site

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