Concrete Support Walls - Construction/Control Joint Spacing
Concrete Support Walls - Construction/Control Joint Spacing
(OP)
We are working on a project with concrete walls (~18" thick) that are 16 feet tall to support roof trusses over a bulk materials handling area. These walls are to be designed as potential push walls from front end loaders.
Any thoughts on the spacing of both vertical (and potentially horizontal) construction/control joints?
Any thoughts on the spacing of both vertical (and potentially horizontal) construction/control joints?






RE: Concrete Support Walls - Construction/Control Joint Spacing
RE: Concrete Support Walls - Construction/Control Joint Spacing
RE: Concrete Support Walls - Construction/Control Joint Spacing
Check impact and bending for the wall. It would probably make sense to tie the trusses to the top of the wall to prevent loss of bearing and take some of the moment to the opposite side wall.
RE: Concrete Support Walls - Construction/Control Joint Spacing
RE: Concrete Support Walls - Construction/Control Joint Spacing
RE: Concrete Support Walls - Construction/Control Joint Spacing
I would tend to use control joints at about the same spacing as the height of the wall, thus 16 feet. If you go longer, you risk having diagonal shrinkage cracks due to restraint by the slab/footing. Don't skimp on the horizontal reinforcement, particularly near the bottom, as that is where the restraining force can cause crack initiation.