Trex Decking Joist Spacing

They seem to recommend between 16-24 inches fro residential construction but reduce this to 12-16 inches for commercial. Unfortunately I sense that most brands are waffling.

Deck Joist Spacing Blocking Proper Techniques Timbertech

The size of the joists increases with an increase in the size of the deck.

Trex decking joist spacing. When installing any Trex decking product especially Trex Transcend Tropicals it is a good idea to mix and match all of the boards on the job site prior to installation to ensure an appealing mix of light and dark tones. Similar to wood the less material in the decking either through scallops or thinner decking less then 1 25mm the closer the joist will need to be. Most composite and PVC decking brands like Trex and Azek recommend a maximum joist spacing of 16 inches OC.

Click to see full answer. When designing a new trex or composite deck the spacing between floor joists should be 12 inches on center. Most composite and PVC decking is designed for joist spacing of 16 400mm on centre.

Spacing between deck boards provide a few critical functions. Determine the decking board thickness and direction to determine joist spacing. Gaps that are narrow 18 can catch debris specifically on top of the joists and can be difficult to clean out.

Larger gaps such as 14 allow more of this material to fall through the deck. 210 to 15 feet and 212 to 18 feet. Gapping also allows for the shrinkage of the wood joist system.

Between beams or slab etc. 4 stringers for 36 stair width. Universally it is recommended that you space your joists 16 inches on center can span 15 times feet their depth measured in inches.

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. The primary function is to drain water from the deck. Gapping is necessary for drainage and the slight thermal expansion and contraction of Trex decking boards.

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. Dimensions stated represent the maximum length of unsupported joists ie. There are a few exceptions that you need to check before building your deck.

Also many composite decking materials require 12 or even 10 on center stair stringers spacing to support composite stair treads. 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. The table below shows figures for domestic applications uniformly distributed load 15kN m2 and commercial applications uniformly distributed load 40kN m2.

Trex Select boards are thinner than. Then using the lumber size of joists and the joist spacing determine if you are within the maximum allowable joist span. 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.

The majority of composite deck board brands including Trex TimberTech and more require deck joists spacing to be at 16 inches OC. Joists can usually span up to 15 times their thickness in feet. You must gap Trexdecking both end-to-end and width-to-width.

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 spacing between joists is 12oc. Spacing for a 28 goes up to 12 feet.

On center means that the measurement should be taken from the center of a joist edge to the center of the next joist edge. Decide whether the joists will cantilever over or not. With minimum of 3 spans ie.

Note Trex fascia has to be gapped width-to-width and end-to-end the same as Trex decking. The deck joist span chart below is based on the updated codes from the International Residential Code 2015 which for the first time specifically addressed these deck design considerations. Composite decking brands also generally require 12 inches OCjoist spacing for 45-degree or angled composite deck board applications.

Thanks for the heads up on slipperness issue. On center for standard straight composite decking installation. For 26 deck boards.

Wood will do the same thing in the same condition but Trex gets even more slippery. For composite and 54 decking and up to 24oc. Table 12 or Table 13 3.

Joist and Deck Board Spacing Guidance. DO NOT combine Trex Select decking with other Trex decking products. In this guide well discuss joist sizing spans spacing and factors that affect material selection when framing a deck.

For gridlines which will support the span of the deck boards Gridline B follow standard spacings at a distance of between 250-350mm. For treads Trex says to space them 12 oc.

Deck Joist Sizing And Spacing Guide