Proven cost efficacy. Definitely the fastest system to install, and one of the cheapest. TYPE A – Starting row of joists* TYPE A- TYPE B – Second row of joists TYPE C – Third row of joists TYPE D – Fourth row of joists TYPE D+ 1.5° to 2° Slope 6 sizes available Observe Max Width Cutting joists to fit Width adjustment / lateral stability Nogging and extra height runners Drilling extra holes Extra Width End of Run
Pre-formed, adjustable joists that provide a level sub structure ready to fix the decking of your choice
Place the first row of TYPE A joists against the wall or door entrance (the highest point of the slope). Keep a 12mm gap between the end of the joist and walls/doors. Using a sprit level placed on top, open the joist until it is level. Fix the joist together with 8g x 40 stainless wood screws at 200mm centres.
*For decks with less than a 100mm step down, use Type A-, available in 600mm lengths.
Place the screw end of a TYPE B joist level with the end of the previous row, and put in first screw. Using a spirit level, open the joist until level and screw together as per row A. With row A and B now end for end, connect them together with the Stainless steel flitch plate, fixed horizontally with 8g x 40 stainless wood screws. (See figure below.)
Repeat instructions as for TYPE B, connecting row B and C with the flitch plate fixed vertically (see figure below). At any time a row can be cut to required length.
Repeat instructions as for TYPE B, connecting row C and D with supplied stainless flitch, fixed vertically.
When installing on a 2 degree slope, you will need to place a 45 x 45mm runner under this row (rubber mounts attached). (See figure below.) Screw the joist to the runner with a 10g x 50 stainless steel screw.
The adjustable joists are designed to be used on sloping surfaces from 1.5 degrees to 2 degrees.
Available in five 1200mm lengths: A, B, C, D, D+, and one 600mm length: A-. They are designed to connect together and allow for the increased height as the deck slopes away.
The maximum width of decking before extra runners are needed* is 3.6m for a 2° slope and 4.8m for 1.5° degree slope. (See figure below.) *Extra runners supplied.
The width of the deck will determine the joist types needed. To shorten joist to the length of the deck, cut the joist and reposition the flitch. Cut joists should be primed and sealed with an exterior timber primer.
At any time the last row of adjustable joists can be cut to measure. Once the width is complete the last row end can be supported with nogging to provide lateral stability (if required) prior to screwing the decking on.
Adjustable Deckchair Joists are made from H3 treated LVL to reduce any timber warping. Nogging and extra height runners must also be H3 treated timber.
Additional holes may need to be added to joists that have been cut to suit.
For extra width longer than 4.8m, purchase extra TYPE D joists and install by placing on 90mm high x 45 mm wide runners. (Runners not supplied.)
Decks will end over an internal gutter or flush at the end of the deck. (See Detail 1 and 2.) Stainless 50 x 50 Angle to be used in gutter support.
Proven cost efficacy. Definitely the fastest system to install, and one of the cheapest.
TYPE A – Starting row of joists*
TYPE B – Second row of joists
TYPE C – Third row of joists
TYPE D – Fourth row of joists
1.5° to 2° Slope
6 sizes available
Observe Max Width
Cutting joists to fit
Width adjustment / lateral stability
Nogging and extra height runners
Drilling extra holes
End of Run