I have an existing unreinforced concrete slab-on-grade to check for new machine loads. Is ACI318 chapter 22 (Structural Plain Concrete) allowed to be used for such design checks (such as section 22.5)?
The reason I ask is that section 22.1.1.2 states that "Design and construction of soil...
I'm tasked with checking an existing 5" thick fiber reinforced concrete "housekeeping" pad for new equipment loads. This is a very large existing pad (approximately 1300SF) that will support multiple new pieces of equipment (some permanently anchored to the pad and some movable on wheels)...
I am working on a Army Corps project that requires us to construct concrete pavements (typically 8-inch thick) with both smooth and deformed dowels ("tie bars").
For the smooth dowels the contract specifications state, "[Dowel] Bars shall conform to ASTM A615/A615M, Grade 40 for plain...
What is the allowable tolerance (if any) for the gap between beam flanges and column faces for Complete-Joint Penetration Groove Welds?
The AWS D1.1 apparently indicates that the root opening (for a 45-degree groove angle/beam flange bevel) should be 1/4" with a backing bar utilized. After...
I am working on Army Corps project that has both contract drawings and specifications for masonry.
The drawings indicate:
"Masonry System Compressive Strength, f'm = 1500psi"
"Mortar Shall be Type S"
"Grout Compressive Strength, 3000psi"
The specifications state that the mortar is to follow...
I am reviewing a set of structural drawings that call for cold formed (light gauge) steel to be stainless steel conforming to the ASTM spec A446 Grade A. I understand that this ASTM has been discontinued and replaced with ASTM A653 and the drawings need to be changed for this reason. However...
I had a question regarding the effects and possible requirements of welding to existing wide flange beams while these beams are under load.
This particular job requires cutting holes into an existing concrete floor slab, which is currently supported by wide flange beams (no metal deck; this is...
I am tasked with designing a slab on grade for a new generator and am wondering about the effects of wiring this generator in parallel to the utility. One manufacturer that I have talked to mentioned that the generator could potentially "jump" off the actual foundation if out of phase enough...
I am in the process of designing a concrete slab-on-grade for a diesel generator and have come across a design issue with regards to anchorage of this generator to the slab-on-grade.
This appeared to be a basic design in which typical gravity, wind and seismic loads were accounted for and the...
