Roof Overhang Wind Loads

In this section we are going to demonstrate how to calculate the wind loads by using an s3d warehouse model below.

Roof overhang wind loads.

Please see below for asce 7 10 figure 28 6 1 case b zoning. Overhangs on the leeward and side edges shall have the basic zone pressure applied i absolutely do not agree that the figure is a correct application of the chapter 28 part 2 wind loading provisions for case b wind direction. When the canopy is similar in size to the building which is common in residential applications see image below the canopy is to be designed for mwfrs roof overhang wind loading. Mwfrs main wind force resisting system roof overhangs.

Asce 7 10 provides two methods for wind load calculation. Warehouse model in skyciv s3d as example. Guide to the wind load. All these studies used small scale models that were instrumented with pressure taps to capture the wind effects on the building envelope.

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. Site location from google maps. 3 21 2013 2 asce 7 10 section 27 1 2 conditions a building whose design wind loads are determined in accordance with this chapter shall comply with all of the following conditions. A simplified procedure and an analytical procedure.

Examples of components include fasteners purlins girts studs roof decking and roof trusses. Wind induced loads on overhangs have been studied in atmospheric boundary layer abl wind tunnels in the past. In order for a structure to be sound and secure the foundation roof and walls must be strong and wind resistant. The zones for roof overhangs are different from the zones for a monoslope roof.

Components receive wind loads directly or from cladding and transfer the load to the mwfrs. Tables are included that provide data for commercial buildings with monoslope roofs and overhangs as well as design pressures for mwfrs for wind parallel and normal to roof slopes and normal and parallel to ridge lines. Skyciv released a free wind load calculator that has several code reference including the asce 7 10 wind load procedure. When building a structure it is important to calculate wind load to ensure that the structure can withstand high winds especially if the building is located in an area known for inclement weather.