Contractor friend is trying to find the ultimate forces for one of these screws (3/8" diameter) screwed all the way into 5/8" A36 steel plate. I can't find any charts or values and don't know the ASME spec.
He needs it to prove to client that he can meet a blast force, they are doing a...
I am replacing a 21 foot tall chain link fence that only had 3" pipes at 9 ft o.c., which from a post selection guide for fencing I found it not adequate at all.
They are wanting to replace the fence with baseball netting and have the posts at 18 ft o.c., which I am to design. My question is...
50 year old two story building with brick veneer has no expansion joints and has cracked in all the usual places. Owner would like to repair and make it right.
Can brick be repaired and joints cut into existing, that would seem to be most logical but not sure how practical? What is typically...
Recently poured slab for a 2 story metal building has developed diagonal cracks in each corners. The cracks are in the slab only, the grade beam had poured several weeks ago. Each corner had embedded anchor bolts (in grade beam/foundation). Not a crack pattern that I have seen that I...
This building has a 6.5" composite concrete deck (3500 psi, fiber-reinforced, 520 lb cement) that is the second floor of a 3 story building. There is no ground floor so below this deck is not conditioned space. It is covered by metal framing so it is protected from rain.
There was a...
Contractor and testing lab having a disagreement on this, I don't remember every being asked about it.
Looking for guidance on two issues:
Form removal for pile caps - ACI 318 basically says do no harm and doesn't give specific time. There is a lot of discussion in ACI 301 about the issue but...
Need a steel material that is readily available that can will work as a pin in a double shear connection with un-factored loads of about 90 kips (DL+roof LL). The connection will have a 2" thick plate middle and 1" plates either side connected with the pin.
We called out 1 1/2" diameter but...
What exactly do Mpc and Mps mean here:
Ultimate Bending Resistance, Ru = 8(Mpc+Mps)/(L2*w) = 20.3 psi
FROM THIS WEB PAGE:
http://www.mbindustries.com.php5-9.dfw1-2.websitetestlink.com/blog/?p=303
What live load should be used for hospital interstitial space that will hang below occupied floors and be used for HVAC (accessible to maintenance staff).
Also, if anybody has done one in a steel building (composite beams) I would be interested in how you framed the space and any lessons...
For typical 8-12" wide pre-fabbed trench drains, do you normally put joints along the length (this one is 120 ft long) or just reinforce it and let it crack?
Anyone ever run into trouble with scissors lift (or similar) loading on composite slabs? Do you specify an allowable wheel load or similar in construction docs?
tw
Doing a school with steel joist roof and cmu bearing walls. The building has a 4 ft roof overhang all around. I'm using joist extensions on the side perpendicular to joists. My question is on the sides parallel to joists. I've never used the loose outriggers from the joist mfg. cuz they say...
We typically specify thickened slab and dowelled rabar for interior CMU partition walls. We don't use a lot of CMU so it was never a big deal. Now we have an elementary school that is chock full of them. Has anyone ever used some type of post-installed shear connector that can be easily...
I have a 12,000 lb 6" thick precast panels that will bear on my continuous grade beam. Assuming during erection there will be two bearing points that will each take 6k. The ledge (like brick dap) is 6" wide so panel bearing will be centered as close to edge of concrete as 2 1/2 inches. Let's...
Is there any reason to pay attention to the (more restrictive) metal deck span limits from Factory Mutual for normal commercial construction? The CSI deck catalog I have gives them in their tables and they have a Factory Mutual approval guide at...
I have a contractor that is bidding on a design/build for a new mill. One of the buildings is a mill building that will house an 80 ton class F crane. This thing is 82 ft high and 76' wide and they want the frames on 30 ft centers.
Anybody have a feel for what drift should be allowed due to...
What are the "D" bars in the CRSI retaining wall tables for? I assume shear but there is little info given about them and they aren't included in any of the past tables.
tw
