Cladding and Components wind load combination

[jimrcasper]

How are wind cladding loads combined? For example a corner of a building, how are the wind cladding loads combined, for design the corner support?

To the best of my knowledge the ASCE 7 code does not address cladding load combination, it applies orthoginal loads seperately. I see the corner having a pressure applied on one side and a suction on the other.

I believe it to be overly conservevative to apply full pressure to one side and full suction to the other.
Are the Main Wind Force Resisting System load combination applicable to cladding? (They specify 3/4 load in each direction)
Thanks

 

[JAE]

When you say "combined" what loads are you talking about?

ASCE 7 provides applicable component/cladding wind loads at specific locations on a structure. There is no combination with other wind loads (such as MWFRS loads). Just wanting to better understand your question.

 

[jimrcasper]

The load combination I am refering to is the combination of wind loads from x and y directions (z being the vertical dimension) acting on cladding support structure at the same time. The Cladding support structure is not part of the MWFRS.


The situation I am questioning is a cladding anchor that has cladding attached to it in both the x and y directions. I believe full pressure in the x direction and full suction pressure in the y direction is overly convervative, but I have not found any direction as of yet.

Hopefully this helps.

 

[JAE]

According to ASCE 7, there is no "wind direction" for Components and Cladding. There are just pressures applied to the surface all at once (see tables 6-5 thru 6-8 in ASCE 7-89). So at the corners, both of the high corner pressures act at one time, either all positive, or all negative. I don't believe there is a case where one side of a corner is positive and one negative pressure.