In a past project, we specified a jointless slab by providing a preliminary spec and dosage requirement, then stating that the final requirements would be per the delegated designer, assuming that would be the steel fiber vendor. We eventually got what we intended but the contractor tried to buy...
What is a standard way of framing an attaching sliding doors to cold form steel studs? Obviously, there are a lot of problems with the arch detail below, which shows a series of 1/2" dia bolts fastening through gyp bd and tapping into the CFS header.
For a precast wall panel with vertical joints supporting a steel girder, should one assume a load distribution similar to a cast concrete/masonry wall or similar to a 8'-0" wide concrete column? In other words, is it better to use a uniform width wall footing or a spread footing below the girder?
I have a skirt where the bottom few inches have rusted out, and the plan is to cut the bottom 6" out in segments to replace it. My first instinct was to CJP it all around, like-for-like, from the outside so that no one is welding in confined space. However, this skirt is 3/8" thick by 18'-0"...
Hey all, this should be a fun one. I have a drafting machine that I intend to repair. Some components work, and some don't:
[ol 1]
Probably a horizontal slide stop. Does not work
Embedded metal plate that slides. I believe that 2 locking screws are missing.
Working vertical slide stop.
Dial...
I'm looking at a detail that calls for 3/16" fillet welds, as if it's a shear tab. I know that that's too much heat on 16 GA. Assuming that strength isn't an issue, what's the proper way to specify this weld?
OSHA states, "Stability factor means the ratio of the stabilizing moment to the overturning moment." and "1910.66(f)(3)(iii)(A)
Every davit installation, fixed or transportable, rotatable or non-rotatable shall be designed and installed to insure that it has a stability factor against...
I have a project assessing an existing structure from the 40's where the square spread footings are under-reinforced (<0.0020*Ag). If I apply the old "one-third greater area of steel" rule, then the entire building is in distress. The footings have a monolithic pad on top, and I'm curious as to...
https://www.structuremag.org/wp-content/uploads/2014/08/C-StructuralDesign-Azzi-Apr081.pdf
This article says that I can place a 65 kip post on an unreinforced 6" slab with a factor of safety of 3, which is like a 4'-0" square footing. Opinions?
I'm in a situation where I need to provide construction support for interior non-load bearing partition walls, and I'm not familiar with standard practice in these situations. I know that the walls should extend to a diaphragm or there should be a kicker at the top for lateral support, neither...
I specified a CJP field weld, and the detailer has pointed out that it requires a backing tab which can't be installed because there is an existing metal deck and slab above. Does anyone have a solution for this?
Problem: Bottom of base plate elevation is 7" above the Top of the concrete pedestal/pier.
- I looked into grouting 7", and it is not recommended. Concrete will be used to raise the piers.
- Anchorage and embedment are not a problem.
- The contractor proposed to install anchors, hard shim...
Problem: A duct run is to be placed on a roof of k-joists. The joists have very limited reserve capacity.
Given: The vertical depth of the ducts is 6'-0". Balanced snow height is 14".
Goal: Minimize the height of the duct run (for wind), but provide enough roof clearance that it is not subject...
How do you compute the ice load on bar grating? The bars are too closely spaced to use the ice load from one bar and take summations. It's not exactly a flat horizontal plate. And why does ASCE equation 10.4-2 have pi as a factor for ice volume on large flat plates?
Mapped Ice Th. = 3/4"
Design...
