Roof Live Load Vs Live Load

They are applied to the structure on and off over the life of the structure.

Roof live load vs live load.

Roof loads are a downward vertical force on the home. Roof load live load design is affected by the shape of the roof whether it is flat curved or pitched. Using the term live loads when referring to roofs might make you scratch your head initially because roofs unlike floors aren t asked to bear the weight of things such as furniture and occupants of a home what you would normally think of as a live load. 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.

Roof and floor live loads are produced during maintenance by workers equipment and materials and during the life of the structure by movable objects such as planters and people. Also measured in psf these loads include the anticipated weight of people furniture appliances automobiles moveable equipment and the like. Arch 331 note set 13 1 s2014abn 2. The dead loads are permanent loads which result from the weight of the structure itself or from other permanent attachments for example drywall roof sheathing and weight of the truss.

Live loads refer to the dynamic forces from occupancy and intended use. The north zone design live load equates to 40 pounds per square foot. This downward imposed load on the home is also known as the snow load. They represent the transient forces that can be moved through the building or act on any particular structural element.

But when we discuss roofs these days live loads are generally associated with the weight that the roof structure might be asked to endure while the roof is under construction or renovation reroofing. However a south roof load zone home cannot be installed in either a middle or north roof load zone. Minimum design live load can be found in asce 7 table 4 1 or ibc table 1607 1. Where snow isn t a problem the live load can come from people working on the roof and any equipment they take on to the.

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