Internal Pressure - Two Sided Warehouse?
Internal Pressure - Two Sided Warehouse?
(OP)
I have a portal frame warehouse to design. 45m square. Framing spacing of 9m.
Only two sides of the warehouse have sides, the other two are completely open. One end wall and one side wall.
Can I develop internal pressures?
There is nothing referenced to this situation in the Australian Codes, so I'm not sure. I don't want to assume an internal pressure if it can't happen, big difference in sizings.
Thoughts?
Only two sides of the warehouse have sides, the other two are completely open. One end wall and one side wall.
Can I develop internal pressures?
There is nothing referenced to this situation in the Australian Codes, so I'm not sure. I don't want to assume an internal pressure if it can't happen, big difference in sizings.
Thoughts?






RE: Internal Pressure - Two Sided Warehouse?
RE: Internal Pressure - Two Sided Warehouse?
I think you have windward and lee ward pressure, yes. But internal pressure is slightly different. Normally you assume the structure is like a large wall in that there is wind on the front face (windward) and 'suction' on the rear face (leeward) with some pressure that can get inside and push on the walls (internal). However once you get a large opening on the front face of the structure wind can enter through this opening (like a balloon effect). So now you have windward pressure on the front face, leeward pressure on the back face and also this what is essentially a windward pressure on the inside back face of your rear wall (internal).
EIT
www.HowToEngineer.com
RE: Internal Pressure - Two Sided Warehouse?
RE: Internal Pressure - Two Sided Warehouse?
RE: Internal Pressure - Two Sided Warehouse?
BA
RE: Internal Pressure - Two Sided Warehouse?
RE: Internal Pressure - Two Sided Warehouse?
Building is L shaped with a normal gable warehouse roof.
Wind hitting either of the walls first would result in standard roof, windward and side wall pressures. There is no leeward wall to have pressure on, only the inside face of the windward. Would this experience the same leeward suction as a normal building even though wind coming over the roof is met by an open space? I.e. Suction caused here has further to "travel" back to a surface.
As for wind entering the open sides first. Normal roof pressures. Windward pressure on the internal back wall. Probably no wall suction. Unsure on pressure pushing roof up from inside?
RE: Internal Pressure - Two Sided Warehouse?
There is no case for open type buildings really.
Most of the coefficients come out fine. Its just the internal pressure (inside face of windward and inside face of roof) when wind hits a walled side first, and the internal roof pressure when it comes in the open side and hits the back wall first
RE: Internal Pressure - Two Sided Warehouse?
Not looking at the Standard at the moment, but have you tried the Appendix section on canopies, awnings, etc? That may be appropriate for the internal pressures.
RE: Internal Pressure - Two Sided Warehouse?