Components and Cladding with Internal Pressures
Components and Cladding with Internal Pressures
(OP)
I typically calculate wind loadings on exterior metal wall panels which are considered an element of Components and Cladding. The location of the panels are often attached to the building where the backside of the panels are NOT exposed to the internal pressures. For example, a current design I am looking at is a metal panel cladding over an existing CMU type wall on a high rise building, where the CMU wall will remain in place. The metal panels are simply cladding over the top of the existing wall. In this case, I am thinking that I might be able exclude the interior pressures when I determine the wind pressure for these panels.
Secondly, would this also be valid when these panels are used for new construction walls, where there wall is made up of exterior gyp board over exterior studs. The metal panel is attached thru the gyp board into the studs behind. Again the backside of the metal panel is blocked by the gyp board and is not exposed to the internal building pressures. Can I eliminate the internal pressure loading? What are your thoughts?
Secondly, would this also be valid when these panels are used for new construction walls, where there wall is made up of exterior gyp board over exterior studs. The metal panel is attached thru the gyp board into the studs behind. Again the backside of the metal panel is blocked by the gyp board and is not exposed to the internal building pressures. Can I eliminate the internal pressure loading? What are your thoughts?






RE: Components and Cladding with Internal Pressures
I just don't know how the volume of space affects the internal pressures presented in ASCE 7....but pressure is pressure and the volume, technically, shouldn't have an effect on it.
RE: Components and Cladding with Internal Pressures
RE: Components and Cladding with Internal Pressures
To expand the discussion, the a second panel system I’m looking at is designed with OPEN joints, allowing the air to pass from the internal panel cavity to the exterior. I don't think I need to consider the internal pressures on the back side of the panel in this condition. Your thoughts?
RE: Components and Cladding with Internal Pressures
If there's uncertainty in design then the typical engineering approach is to increase your level of safety and not to lean towards the less-conservative side of your assumptions.