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I have some 8.8 10mm metric bolts that will experience load in tension. Rated at 830mpa but I am thinking I should be more concerned with thread pullout then tensile. I Could not purchase 10.9 bolts so was wondering if these would work and what the calculation would be for the thread pullout.

Can you guys tell me how to figure out this wiring problem. Only one bar is disconnected. All others have continuity but I have 3 loose wires. 2 have continuity to each other only, the other has continuity to all the bars. How di I wire this back up?

I cant seem to find a cross ref for 2 Hoover bearings 97200 and 97201. What year did they standardize? I am thinking somewhere in the 70's

Any of you have run into problems with Thermal Bridging due to skylights?

Need a ul for a ceiling made from steel studs and type X on one side. Cant seem to find it.

anyone know if you have to have a rated wall to install a hydraulic pump/motor in the wall?

Do you have to have wire glass in a 1 hour rated storefront. I thought I some rated ones that were clear glass and 1 hr rated, 2 1/2" thick frame.

This section on interior walls in a parking garage are vague. What if the wall is small like 10 feet. Are you suppose to have a 20% opening in that.

Did they revise this section about parking garages drastically? It just references atmospheres now. Where in the nfpa 101 does it talk about parking garage design using natural atmosphere.

Is there anything in the mechanical codes that talks about using screens around roof top equipment. I cant find anything in the municipal codes about not viewing equipment from the street but I am sure its there.

What if I need a wall that is similar to UL 445 but I need different side sides and/or air gap. Cant seem to find one that matches.

​Florida structural engineering question. This house has rotten wood columns. 6 columns and all are hollow, not structural, I think. The distance from the brick wall to the fake column lintel is 6'1, wood frame house, slab on grade with the exception of the porch. Are the columns holding the...

I need to put a hydraulic pump and motor in a steel stud chase wall. Does the wall/ enclosure have to be rated, either NFPA or NEC?

It wasn't that long ago that fly ash in the concrete mix design was a bad thing. Today it seems like its the "green" thing to do. Walmart is specifying 15-25% in their mix design to reduce off gassing. So how to structural engineers feel about the use of fly ash today?

I was told that you need a ledger angle for brick veneer around 15-18 feet high. If thats the case, you have to have weeps above each ledger angle, right?

On 2hr stair towers, with 90 min doors, do the thresholds need to be special or can they be undercut. I didn't see anything in nfpa 80

I have a stair tower that dumps into a 2hr rated corridor that leads to the outside of the building for secondary egress. I was told you cant have other doors leading into that corridor. I don't see why not. Its like an egress corridor for a bunch of school classrooms. Any thoughts or examples...

I want to use double studs opposing in a track for a door header but I was wonder what size to use. If the wall is 6" studs, should the header studs be 6" or can I use 4"

Working on a new hotel at work and noticed that there are alot of rooms and corridors that are rated. 1hr, 2hr, 20-45-90 min doors. So hotels have to be sprinkled right, well at least the rooms so if the whole building was sprinkled you would not need rated rooms anywhere, right?

I have a hydraulic pump from a truck that powers 2 ram cylinders. I would like to build a test stand with an electric motor to power the small hydraulic pump to see if it works. How do I size and select the motor.