Kansas Roof Live Load Rating

Where uniform roof live loads are reduced to less than 20 psf 0 96 kn m2 in accordance with section 1607 12 2 1 and are applied to the design of structural members arranged so as to create continulty the reduced roof live load shall be applied to adjacent spans or to alternate spans whichever produces.

Kansas roof live load rating.

In order to reach the upper limit of 40psf live load asce prescribes a space of say 24 foot by 30 foot would have to hold 148 average sized adult males per wikipedia 194 7 pounds at once. Use ibc 2003 15 psf 25 psf. In this case your joists are adequate to support a 30 psf live load and 10 psf dead load. 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.

Use span tables for progressively heavier loads until you find the limits of your floor. A more common and realistic live load would fall somewhere between 5psf and 10psf a mere fraction of the prescribed minimum. Arch 331 note set 13 1 s2014abn 2. D dead load l live load l r live roof load w wind load s snow load e earthquake load r rainwater load or ice water load t effect of material temperature h hydraulic loads from soil f hydraulic loads from fluids.

Purpose of this web site. If you live in the us our snow load calculator compares the total weight on your roof with the permissible load calculated according to the standards issued by the american society of civil engineers regarding the minimum design loads for buildings and other structures asce7 16. Each state has a listing of building code and applicable guidelines for snow loads as well as details about where the snow load information may be found or purchased. The span table for a 30 psf live load 10psf dead load floor indicates a required fb value of 1 315 and a minimum e value of 1 800 000.

The north zone middle zone and the south zone are identified on the roof load zone map above. The roof shall be designed for the live load indicated in table r301 6 or the snow load indicated. The north zone design live load equates to 40 pounds per square foot the middle zone equates to 30 pounds per square foot and the south zone equates to 20 pounds per square foot. Victor staley a building official in the town of brewster mass responds.

1607 12 1 distribution of roof loads. Use ibc 2003 50 psf 100 psf with case study areas and contact local building officials for determining required snow loads. Use ibc 2003 15 psf 20 psf with case study areas at higher elevations. Use ibc 2003 0 psf 5 psf.

Ground snow load might seem somewhat confusing until you read the basic premise that is identified in irc section r301 6 which states.