For example, a fine clear glass rail will be significantly more costly than a pressure treated pre-fabricated rail. 2. People, furniture and any other movable, physical objects on the deck are covered under live load. 1 comment. Weight (psf of horizontal plan area) 9–1 2 2.5 11–7 8 3.5 14 4.0 16 4.5 18 5.0 20 5.5 24 6.0 26 6.3 28 6.6 30 7.0. Deflection is limited to the span in inches divided by 360, and is based on live load only. Ground snow load, live load = 40 psf, dead load = 10 psf, L/Δ = 360 at main span, L/Δ = 180 at cantilever with a 220-pound point load applied at the end. 12'-0" 2 x8 16" O.C. Look for high/low/uneven joists using a tight string line. 1. A-Affordable Decks is a quality deck contractor based in Lombard, Illinois. To determine the maximum load capacity of your deck, start by calculating its total area and multiply by 50 psf. Deck material shall be 2 inch nominal dimension lumber. So a 100 sqft deck would be designed to support 5000 lbs. 2 grade, and wet service conditions. Name * Email * Website. I'm wanting to beef-up the framing on an existing deck to support the weight of a hot tub. Joist Span – Non-Ledger Deck Table 1. Decks built ground level up to 2 feet off the ground can support up to 100 lbs per square foot; sufficient for most hot tubs. Deck live load is 40 psf, deck dead is 8 psf. 100 x 25mm or 150 x 25mm timber for profile boards. The cost of the railing includes the cost of posts, rails, and balusters. See Paragraph 7.3 substructure steel framing system are 5.13 Deck boards shall be positively fastened to each joist. 2. S an 2 x8 12" O.C. For residential decks designed for entertaining large groups, it’s not a bad idea to overbuild it from the minimum 40 psf required by building codes. When sizing the footings, beams, and joists, do I need to design them for the snow load (60 psf) plus the live load (40 psf) for a total of 100 psf, or just for the snow load since it’s the larger of the two? Supporting Evidence 6.1 Manufacturer's drawings and installation instructions. • Snow – drift & sliding? Glued & Nailed Subfloor ΔL ≤ L/480. 2 or better with a minimum design stresses specified in the tables. the Deck Lateral Loads section below, decking can provide diaphragm capacity and stiffness, but those strength and stiffness values assume face nailing of the decking into the framing. ). Use span tables for progressively heavier loads until you find the limits of your floor. This is our full set of plans for a deck with a hot tub. In order to be able to determine the amount of force that is exerted from the deck surface to the footings, it helps to conceptualize the path that the forces travel from their source to the ground. See more ideas about deck framing, deck, building a deck. Figure 2C. That is your first step. to support a load of 50 p.s.f (combined live-dead loads). custom compound bow string says: November 7, 2018 at 11:29 am. Fewer posts on upper level decks are typically more desirable to the occupants and this drives the use of larger framing materials for longer spans. In this case, your joists are adequate to support a 30 psf live load and 10 psf dead load. Final Deck Lumber Calculator Considerations This document does not apply to decks which will experience snow loads, snow drift loads, or sliding snow loads that exceed 40 psf. For example, a fine clear glass rail will be significantly more costly than a pressure treated pre-fabricated rail. Our page top photo shows a small deck addition to a 1920's bungalow in Poughkeepsie NY. For assembly uses, such as restaurants, churches and music venues, the minimum live load is 100 psf. Basic Decks w/ 60 psf Live Loading April 1, 2017 This Tip Sheet reflects code requirements of the 2015 International Residential Code (IRC) with Washington State Amendments which update the live load to 60 psf. 4. Recommended or allowable joist & beam spans: this article explains typical spans for deck joists, deck beams, and deck flooring, giving both standard span tables and a quick "rule of thumb" that works pretty well.
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