DoubleStud
Structural
Folks, help me understand what exactly the blocking and the nailing are resisting. Thanks!
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This does not match with what XR250 said. upper floor forces will go to the shear walls? I think this blocking is only resisting wind from out of plane wind from lower wall? (half of wall height below).TheDaywalker said:That is the total trib height to the diaphragm at that level which is correct.
jerseyshore said:This type of perpendicular blocking is rarely done for wood walls
To help brace top of wall? This is a topic that me and my coworkers talk about all of the time. How much load per ft can we expect on a typical floor framing to be able to resist top of basement wall? Do you design the basement wall as pinned at the floor framing? We tend to just put blocking every 2 ft with about 5-8d nails. So that is only about 200 lb per ft of bracing.jerseyshore said:It's most important at the top of a basement wall.
jerseyshore said:But back to the original topic, it's still very useful to have this blocking at the wood/wood levels, but less chance of a failure so it is rarely installed even when specified as TDW mentioned.
Celt83 said:This blocking is critical in any location where the floor framing is parallel to the wall. If the blocking, blocking fastening to the floor sheathing, and just as import the fastening of the lower wall top plates to the blocking are not present then there is no load path for the wind pressure on the lower wall panel into the floor diaphragm which makes the system unstable.