Joist Spacing For Trex Decking

Tools SAWS Miter Saw. In this guide well discuss joist sizing spans spacing and factors that affect material selection when framing a deck.

Deck Joist Sizing And Spacing Guide

Also many composite decking materials require 12 or even 10 on center stair stringers spacing to support composite stair treads.

Joist spacing for trex decking. Decide whether the joists will cantilever over or not. Table 12 or Table 13 3. For gridlines which will support the span of the joists Gridline A the spacing distance between pedestals are determined by the maximum support span of the joists used see table below for reference.

Please note that when deck joists are cantilevered they should not extend further than one-fourth of the actual adjacent joist span according to IRC 2015 R5075. Furthermore how many stringers do I need for a 36 inch wide staircase. For 26 deck boards.

TimberTech PRO and TimberTech EDGE boards must be a minimum of 18 to a maximum of 316 deck board spacing. Unfortunately I sense that most brands are waffling. Most composite and PVC decking brands like Trex and Azek recommend a maximum joist spacing of 16 inches OC.

They seem to recommend between 16-24 inches fro residential construction but reduce this to 12-16 inches for commercial. We recommend beams are constructed from two 44 x 145mm Q-Deck deck joists and are placed at maximum centres of 18m. When designing a new trex or composite deck the spacing between floor joists should be 12 inches on center.

Some builders reduce joist spacing to 12 on-center to strengthen the deck frame or to increase maximum allowable joist spans. Most decking is designed to be installed across 16 on center joists. Then using the lumber size of joists and the joist spacing determine if you are within the maximum allowable joist span.

Decking must be able to support 40 lbs live load 15 lbs dead load as it is supported between joists. Most decks use 16 on center spacing for joists. The majority of composite deck board brands including Trex TimberTech and more require deck joists spacing to be at 16 inches OC.

DO NOT try to lift the same quantity of Trex boards as you would traditional lumber. Most composite decking materials like Trex composite decking require minimum joist spacing for composite decking at 16 on center spacing for straight decking and 12 on center joist spacing for 45-degree angle diagonal decking. Position replacement board and secure fasteners on center of each joist.

Besides can you use a router on Trex decking. In this instance the maximum span between deck post. Pressure-treated lumber is typically installed without a gap since the boards will shrink when they dry creating the appropriate spacing.

Determine the decking board thickness and direction to determine joist spacing. On center means that the measurement should be taken from the center of a joist edge to the center of the next joist edge. One of the most critical steps for properly securing composite decking in place is to make sure you have at least a 18-inch gap between the decking boards.

HOW TO REPLACE TREX. For gridlines which will support the span of the deck boards Gridline B follow standard spacings at a distance of between 250-350mm. Joists can usually span up to 15 times their thickness in feet.

Most softwood decking is not strong enough to support longer spans than 16 but thicker hardwood can support greater. Joist Spacing for Composite Decking. The spacing between joists is 12oc.

You may be required to install 12 on center joists for diagonal decking. Composite decking brands also generally require 12 inches OCjoist spacing for 45-degree or angled composite deck board applications. On center for standard straight composite decking installation.

Ive gone to the websites of several brands Boardwalk Trex EverGrain ChoiceDeck TimberTech Nexwood Eon EZDeck and others to determine waht the best joist spacing is. The maximum joist spans below are based on a ground snow and live load of 40 pounds per square foot and a dead load of 10 pounds per square foot. So when would you ever need to use 12 inches OC.

For composite and 54 decking and up to 24oc. Most composite decking materials like Trex composite decking require minimum joist spacing for composite decking at 16 on center spacing for straight decking and 12 on center joist spacing for 45-degree angle diagonal decking. Composite decking can be fastened to treated wood joists with screws or with hidden fasteners.

Trex decking and railing are heavier and more flexible than wood. When using a miter saw we recommend using the Trex Blade or a carbide-tipped blade with 60 teeth or more. Use three Trex recommended composite decking screws every 305 cm 12 always refer to manufacturer instruc- tions to ensure that recommended screws can be used for fascia applications.

For many years decking was primarily wood. Some brands like WearDeck let you get away with more reinforced with a layer of fiberglass on both the top and bottom WearDeck boards easily allow for spans of 24 inches OC. Maximum 2x6 Deck Joist Span.

What S The Proper Joist Spacing For Composite Decking Decks Docks