Live Load On Permeable Roofing

However if the attic is intended for storage the attic live load or some portion should also be considered for the design of other elements in the load path.

Live load on permeable roofing.

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. Irc provides the minimum codes standards for roof structures and other areas of construction used in most areas of the nation including georgia. Load limits on the roof of a building. Arch 331 note set 13 1 s2014abn 2.

Roofs are under a lot of pressure. Live load and snow load what is the difference and how do i know which one applies. Ground snow load might seem somewhat confusing until you read the basic premise that is identified in irc section r301 6 which states. 2attic loads may be included in the floor live load but a 10 psf attic load is typically used only to size ceiling joists adequately for access purposes.

It is one of the major loads in structural design. Calculating the load on a flat roof is a challenging task for the layperson that involves knowledge of building materials their weights and local building codes. This issue of live load vs. Roof loads are a downward vertical force on the home.

Where uniform roof live loads are reduced to less than 20 psf 0 96 kn m 2 in accordance with section 1607 13 2 1 and are applied to the design of structural members arranged so as to create continuity the reduced roof live load shall be applied to adjacent spans or to alternate spans whichever produces the most unfavorable load effect see section 1607 13 2 for reductions in minimum roof. Georgia residential roof building codes follow the same standards as established by the international residential codes irc. There are two different rafter tables in the irc code book. Victor staley a building official in the town of brewster mass responds.

The north zone middle zone and the south zone are identified on the roof load zone map above. The codes cover single family homes. Roof load live load design is affected by the shape of the roof whether it is flat curved or pitched. Is 875 part ii 1987 specifies the live loads for following occupancy conditions.

Live loads should be suitably calculated or assumed by the designer based on occupancy levels. This downward imposed load on the home is also known as the snow load.