A simplified procedure and an analytical procedure.
Roof overhang wind loads.
Site location from google maps.
Warehouse model in skyciv s3d as example.
In order for a structure to be sound and secure the foundation roof and walls must be strong and wind resistant.
Components receive wind loads directly or from cladding and transfer the load to the mwfrs.
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.
Mwfrs main wind force resisting system roof overhangs.
Guide to the wind load.
Skyciv released a free wind load calculator that has several code reference including the asce 7 10 wind load procedure.
In this section we are going to demonstrate how to calculate the wind loads by using an s3d warehouse model below.
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.
The building is a regular shaped building or structure as defined in.
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.
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.
The zones for roof overhangs are different from the zones for a monoslope roof.
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.
The analytical procedure is for.
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.
Please see below for asce 7 10 figure 28 6 1 case b zoning.
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.
