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.

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. In order for a structure to be sound and secure the foundation roof and walls must be strong and wind resistant. All these studies used small scale models that were instrumented with pressure taps to capture the wind effects on the building envelope. 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.

Guide to the wind load. Wind induced loads on overhangs have been studied in atmospheric boundary layer abl wind tunnels in the past. Warehouse model in skyciv s3d as example. The zones for roof overhangs are different from the zones for a monoslope roof.

The building is a regular shaped building or structure as defined in. A simplified procedure and an analytical procedure. 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. Asce 7 10 provides two methods for wind load calculation.

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. 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. Mwfrs main wind force resisting system roof overhangs.

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. Components receive wind loads directly or from cladding and transfer the load to the mwfrs. Site location from google maps. Please see below for asce 7 10 figure 28 6 1 case b zoning.