Horizontal Construction Joints in Concrete Walls

[KBVT]

What types of restrictions do you usually put on the placement of horizontal construction joint in basement walls or interior shear walls? It seems that requiring a Class 'B' tension splice of your reinforcing bars and requiring the concrete surface to be roughened to a 1/4" amplitude would accomodate your flexural and shear requirements, respectively. But what if the contractor is locating two construction joints within the development length of the flexural reinforcement, say a joint within ld from the bottom of the wall? Thoughts?

 

[PMR06]

Within ld from the bottom of the wall? How tall is that, 2 or 3 feet? Sounds like the contractor needs taller forms.

 

[KBVT]

A very unique situtation on this job I am working on, mat foundation with several feet of granular fill on top, with a slab-on-grade on top. Contractor is proposing to place a construction joint at the same elevation as the slab-on-grade, approx 4.5' above the mat foundation.