E M
Structural
- Mar 15, 2018
- 41
10" CIP Basement wall ideally. Need a brick/ stone ledge with full height brick walls at places and corbelled brick over stone and water table at others.
To get BIA recommended clearances of 1"+ from interior face of brick to exterior face of sheeting (and leave enough space between the brick and cast in place to grout solid below grade) the ledge would need to be 5"+/-. This is keeping brick flush with outside face of cast in place basement wall and would leave an actual 1-3/8" cavity (not the ideal 2".... but I can be ok with that). Could cantilever the brick somewhat over the ledge but just see this a probably not a good solution with all the other detailing involved and the fact that in this case the brick is going to also be parged for an "old world" look.
Right now thinking top chord bearing to try and get the trusses up out of the ground as much as possible. But, when you consider that the truss bearing end condition will need to be 4-1/2 inches it becomes questionably worth it for the 16" deep floor trusses we're considering (only gaining a foot).
So, a couple of other ways to think about this in my mind.
- The basement is going to be finished out for the most part so will need to be insulated. Was thinking maybe just stud up some 2x4 walls (rather than furr out and use rigid)at the interior of the cast in place and bear the trusses directly on top of these walls (slab sitting on top of footing). This way could actually "use" the walls we need to pull the insulation & finish component off structurally as well. Trusses would be completely out of the ground around the entire house with only the plate and plywood subfloor to contend with for termites etc.
Note that my engineer balked at this idea when I first presented it. Haven't brought up idea again yet because I wanted to get some other talking points together before I approach him with it again.... possibly. Wondering if this could be a viable solution. Would like to understand why he may be against it from other engineers perspectives.
-Also thought about bottom chord bearing the trusses on either ledgers or hangers cast into the top of the wall.
-Could also cast in a haunch at the brick side (and/or truss side). But seems like this would ultimately be an expensive detail.
-Could also just take cmu all the way down to the footing (below the stone and brick veneer)and grout that and the cavity solid... but is counter intuitive since already pouring the basement walls.
-Could also make the cast in place basement walls thicker I suppose but for some reason that doesn't seem like the best solution to me either
Bottom line is I like the idea of getting the trusses "completely" out of the ground for most areas of the house if there is a solution that could make sense and accomplish that.
Curious as to everyones thoughts regarding these options or something else that you think might make more sense.
To get BIA recommended clearances of 1"+ from interior face of brick to exterior face of sheeting (and leave enough space between the brick and cast in place to grout solid below grade) the ledge would need to be 5"+/-. This is keeping brick flush with outside face of cast in place basement wall and would leave an actual 1-3/8" cavity (not the ideal 2".... but I can be ok with that). Could cantilever the brick somewhat over the ledge but just see this a probably not a good solution with all the other detailing involved and the fact that in this case the brick is going to also be parged for an "old world" look.
Right now thinking top chord bearing to try and get the trusses up out of the ground as much as possible. But, when you consider that the truss bearing end condition will need to be 4-1/2 inches it becomes questionably worth it for the 16" deep floor trusses we're considering (only gaining a foot).
So, a couple of other ways to think about this in my mind.
- The basement is going to be finished out for the most part so will need to be insulated. Was thinking maybe just stud up some 2x4 walls (rather than furr out and use rigid)at the interior of the cast in place and bear the trusses directly on top of these walls (slab sitting on top of footing). This way could actually "use" the walls we need to pull the insulation & finish component off structurally as well. Trusses would be completely out of the ground around the entire house with only the plate and plywood subfloor to contend with for termites etc.
Note that my engineer balked at this idea when I first presented it. Haven't brought up idea again yet because I wanted to get some other talking points together before I approach him with it again.... possibly. Wondering if this could be a viable solution. Would like to understand why he may be against it from other engineers perspectives.
-Also thought about bottom chord bearing the trusses on either ledgers or hangers cast into the top of the wall.
-Could also cast in a haunch at the brick side (and/or truss side). But seems like this would ultimately be an expensive detail.
-Could also just take cmu all the way down to the footing (below the stone and brick veneer)and grout that and the cavity solid... but is counter intuitive since already pouring the basement walls.
-Could also make the cast in place basement walls thicker I suppose but for some reason that doesn't seem like the best solution to me either
Bottom line is I like the idea of getting the trusses "completely" out of the ground for most areas of the house if there is a solution that could make sense and accomplish that.
Curious as to everyones thoughts regarding these options or something else that you think might make more sense.
