I’m reviewing a retaining wall design where in the footing heel, Vu < φVn = φ2(f’c^.5)bd. However Vu > 1/2φVn which according to 318-14, 9.6.3.1 would require a minimum amount of shear reinforcement in the 13” footing.
Does 9.6.3.1 apply for a footing. I assume it does since it is a...
What is the common procedure for installing fasteners at connections where there is also a truss plate? My application is a post frame ag building and specifically attaching knee braces to trusses and trusses to columns. Fasteners include wood screws and 0.20" diam. ring shank nails...
I’m designing a 60’ W x 80’ L, open sided agricultural roofed post frame structure that will sit on top of a concrete wall. I’m trying to use nail built-up 4 ply-2x8 columns. The columns are orientated so that the knee braces are attached to the wide dimension of the column laminations. No...
I'm looking for a few references in 318-14 that I used to follow for retaining walls in older versions of the code. I realize the code has gone to a more member specific layout but I would think these items would still pertain. My application is a cantilevered retaining wall.
1. Minimum...
I'm looking for some type of reference that supports producing a watertight construction joint by sandblasting or water jetting the surface of the first pour to 1)remove laitance, 2)provide roughness, and 3)enable the new pour to bond directly to the first pour's exposed aggregate.
My...
What is the best method to compute Q over a submerged weir?
My discharge is 344 cfs, weir length = 40'. Tailwater is 1.4' above the weir (H2). Assume a sharp crested weir.
The procedure in HEC-RAS results in no reduction, so H1 = 2.0'
The equation developed by Brater & King, '76 results in...
Modeling a system in very flat topography that. Channel has a wide flood plane once it jumps out of its ~2yr channel. We have set up a HEC-RAS and it is interesting to notice that the HW on culverts are higher using HEC-RAS than HY-8. 1.7' higher for a Q of 387 cfs.
Assuming one has...
Assuming that coring confirms a low 28 day break, we are planning on removing a section of a concrete wall we are building. Wall is 18" wide and the section to be removed is 9'x30'. Section is defined by a construction joint along the bottom with steel reinforcement in the upper wall lap...
