ACADuser Posted September 7, 2019 Share Posted September 7, 2019 Here in Florida we do a lot of CMU exterior walls. I suppose the strength & termite resistance is driving that Anyway when you have 2, 3 & 4 story houses then floor to floor error (3/4") adds up. With a block wall 9'-4" common plate height and 16" common web truss the first floor plate height is 9'-4" of course. But adding another 9'-4" the plate height becomes 20'. And 30'-8" is the 3rd floor. So to add in the 3/4" plywood subfloor in the model or not? I suppose the correct method is to make floor to ceiling heights 3/4" less. (9'-3.75") How do you address this problem? Link to comment Share on other sites More sharing options...
rlackore Posted September 9, 2019 Share Posted September 9, 2019 I assume the floor trusses are hung off the masonry wall on a ledger, correct? If so, set the exterior walls to hang the floor structure, then set the the floor levels to your 9'-4" increments: With this method the actual floor system doesn't matter. This is my normal method of working with cmu, tilt-up, panelized, etc. Link to comment Share on other sites More sharing options...
ACADuser Posted September 9, 2019 Author Share Posted September 9, 2019 Thanks for the reply, So do you set all the exterior wall to those settings? On the 2nd floor there are cantilevered area that get frame wills & a 3rd floor above that. Also the interior bearing walls, will they honor that plate height? Link to comment Share on other sites More sharing options...
rlackore Posted September 9, 2019 Share Posted September 9, 2019 Wherever you have a floor cantilevered (like at a balcony projection) don't set the wall (or a portion of the wall) to hang: Interior bearing walls will not respect the bearing height - you need to drag them up manually: Link to comment Share on other sites More sharing options...
ACADuser Posted September 9, 2019 Author Share Posted September 9, 2019 Thanks, but I was talking about bottom chord bearing for the interior walls. I'll take a look tonight, it's a little crazy today here. Link to comment Share on other sites More sharing options...
rlackore Posted September 9, 2019 Share Posted September 9, 2019 Bottom chord bearing for the interior walls is no problem - you won't have to mess with the walls at all. Too easy. Link to comment Share on other sites More sharing options...
ACADuser Posted September 9, 2019 Author Share Posted September 9, 2019 OK did a test run & you are correct. Thanks for pointing that out. I've not been using the wall setting correctly all this time. Link to comment Share on other sites More sharing options...
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