Wind Load On Roof Screen Wall

Asce 7 10 provides two methods for wind load calculation.

Wind load on roof screen wall.

In the november 2019 se university session emily guglielmo se from martin martin presented wind loads on non building structures. Care should be taken to provide enough structural support for desired wind load ratings. Components can be part of the mwfrs when they act as shear walls or roof diaphragms but they may also be loaded as individual components. A rooftop equipment screen is a non structural barrier installed on a roof to hide hvac or other rooftop equipment from view or to protect the equipment from potentially damaging wind loads.

Examples of components include fasteners purlins girts studs roof decking and roof trusses. Once the wind speed has been calculated the user can provide additional information regarding the building such as building height type and cladding to get the wind pressure wind load based on asce 7 10 as 1170 and en 1991 provisions. Components receive wind loads directly or from cladding and transfer the load to the mwfrs. When wind loads are applied normal to a masonry wall surface the loads are transmitted to horizontal supports floors roofs beams and or vertical supports cross walls pilasters.

Some engineers use the provisions for roof top structures and equipment others use solid freestanding signs and some argument could be made for using the parapet provisions. Emily reviewed the asce7 wind provisions for non building structures but also offered some guidance on non building structures that are not specifically addressed in asce7. It focused on the effects of rooftop screens on the wind loads applied to the equipment being screened. In order for a structure to be sound and secure the foundation roof and walls must be strong and wind resistant.

The use of equipment screens for aesthetic reasons is more common on low rise buildings where people might see the equipment from the ground while their use as protection from the wind is more common on high rise buildings where wind loads are greater. Preliminary findings suggest that fully enclosed screen wall configurations do lower wind loads on the equipment while partially enclosed screen configurations do not provide significant wind load reduction. Wall panels are usually assumed to function structurally as thin plates or slabs. A simplified procedure and an analytical procedure.

Per square foot with minimal deflection. The roof screen sections are designed to handle approximately 100 mph winds 30 lbs. Also the screen type does not significantly change wind loads on the equipment being screened. It provides the wind load calculations on uplift leeward windward and roof forces of a building.

The simplified procedure is for building with a simple diaphragm roof slope less than 10 degrees mean roof height less than 30 feet 9 meters regular shape rigid building no expansion joints flat terrain and not subjected to special wind condition.