What size bearers and joists for a deck?
The bearers have to carry the weight of the entire deck and whatever is put on top of it, so they need to be strong. A 140×45 treated pine bearer will usually do the trick. Every 1.2 metres, a 90×90 H4 treated pine post will be needed.
How do I know what size deck joist I need?
Commonly used joist sizes are 2-by-6, 2-by-8 and 2-by-10. For example, when you space joists 16″ apart — which is standard for residential decks — a deck spanning 9 1/2′ would require 2-by-6 joists, a 13′ deck would need 2-by-8 joists and a 16′ deck calls for 2-by-10 joists.
What is the maximum span for a 2×6 deck joist?
The maximum distance a 2×6 can span, according to the 2018 IRC, for a floor joist, is 12′-6”, ceiling joist 20′-8”, rafter 18′-0”, deck board 24”, deck joist 9′-11”, deck beam 8′-3”, and 6′-1” as for header. Always check the codes for determining factors or consult a Structural Engineer.
How far apart should bearers be for a deck?
Set up the bearer spacings at a minimum of 1800mm centres with stump holes no more than 1500mm apart. The outside run of stumps will need to align with the outside edge of the deck.
What is the difference between joists and bearers?
Bearers are the timber or steel that attaches directly to the stumps in the ground, that supports the deck of flooring structure. Joists are the timbers that then attach across the top of the bearers, after which the timber or particle board floor is then attached.
How big should the joists be on a deck?
As a rule, the larger the deck, the larger the joists. For example, joists spaced 16 inches from the center of the joist next to it can span 1.5 times in feet the depth of their inches. To learn more about deck joist sizing, spacing, and allowable span, reference this chart.
How big of a bearer do I need for a deck?
As with the joists we must use the 2 kPa floor load figures. Going off of table 6.4 (b) a max bearer span of 1.65m – at a max loaded dimension of 1.8 – shows: This can be made up of two 140x45mm timbers nailed together. Note if you wanted to space the piles 2m apart you would need 190x70mm minimum bearers.
What are minimum bearing requirements for floor joists?
Floor joists shall be laid so that any bow in them will straighten under load. Floor joists shall have minimum bearing on their supports of 32 mm. Joints in floor joists shall be made only over supports, but not where the joist is cantilevered beyond the support. Joints in floor joists may be butted over supports
What’s the difference between a joist and a beam?
Joists are the repeated structural members that are used to build a deck frame. The minimum size joist to be used in deck construction depends on the number of footings and beams that will be installed. What Is a Beam? A beam is the main load-bearing element for the structural soundness of your deck’s roof.