Roof Deck Live Load 100 Psf

Listed spans are for dry service conditions unless the table is labeled as. Aellc structural 27 nov 13 16 51 if a balcony over 100 sf can be designed for residential live 40 psf and a balcony 100 sf is designed for 60 psf it follows the roof deck should be the same i e. 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.

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I have a 16x17 flat roof over living space and would like to put a roof deck on top.

Roof deck live load 100 psf.

A smaller area is liable to have a higher live load than the regular residential floor live 40 psf. Also available for the android os. So a 100 sqft deck would be designed to support 5000 lbs. To determine the maximum load capacity of your deck start by calculating its total area and multiply by 50 psf.

Span calculator for wood joists and rafters also available for the android os. Deflection is limited to the span in inches divided by 360 240 or 180 and is based on live load only. The hot tub will add about 100 psf load to the normal live and dead loads. This value must not be greater than the bearing capacity of the soil.

For decks and the first floors of houses residential code is based on a vertical live loading people and furniture of 40 pounds per square foot psf plus a 10 psf dead load the weight of the structure itself for a total design load of 50 psf. Live loads for assembly spaces other than those described in this table shall be determined from the occupant load requirements as established by section 1004 of this code using the formula 1 000 net floor area per occupant but shall not be less than 50 psf nor more than 100 psf. The deck will be free standing not attached to the house. On a roof with a slope greater than 4 to 12 the live load limit is typically adjusted downward from 20 psf to 15 psf to allow for the relatively greater dead load on the steeper roof.

The load duration factor c d is 1 0 unless shown as 1 15 for snow or 1 25 for construction loads. If you drove a dump truck over it yes this would throw all our calculations out the window. Default is 50 psf which you can change. It then determines the total load from each tributary area based on the design load of your deck.

Applied loads are given in pounds per square foot psf. Conventional deck construction can support greater live loads by using larger dimension lumber or closer spacing of joists and beams. For assembly uses such as restaurants churches and music venues the minimum live load is 100 psf. In contrast a typical commercial deck say at a restaurant built to the international building code ibc is designed for live loads of 100 psf plus a 10 psf dead load.

The total load for each tributary area is then divided by the area of each footing in order to determine the load psf imposed on the soil. Don t get confused with what weight you might think or want to load the deck with. The present surface is rolls of asphalt type shingle.