When I working on a retaining wall, a key seems necessary for resisting sliding. I am wondering do I need to count the soil pressure on key? I use a software called retainingpro, it doesn't include that force.
I am working on a single story masonry building with concrete roof(see attached sketch) . I am wondering do I need to consider drag force when design the roof (e.g. for wall 3).
I am doing a masonry retaining wall design. cbc 2007 section 2107 says for allowable stress design shall use chapter 2 of aci-530 but delete section 2.1.2.1 (load combination) in ACI-530. I am wondering can I still increase allowable stress by one third per aci-530 section 2.1.2.3 for seismic load?
I am designing a building with concrete roof and masonry walls. When I designed the roof I assume the roof is supported by three walls and calculation shows that the middle wall has a moment beside reaction. My question is when I design the middle wall do I need to consider the moment for...
