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25,000lb? With perfect matching strength threads, I sure would like to see that single m10 lift a mack semi tractor.

I used this calculator for the thread shear: https://www.engineersedge.com/calculators/external-thread-shear-area.htm

Yes shear on threads. I thought someone was asking if the bolt itself was in shear. Its the bolted plate scenario, tensile in bolt direction. I have used multiple formulas and have come up with the same number. Is that in PSI and if thats the case do I multiply the area of the bolt x the psi...

Its cast iron. Static, not dynamic and its tensile, not shear.

See if my math works: 10mm bolt = .375 shear dia x pi x thread eng x material shear strength = .375 x 3.1415 x 1" x 2922psi = 3442psi thread pull out. Hard to believe.

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.

Worked perfect. You are the motor man! thanks

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

Its an existing condition. Wood frame causing a thermal bridge

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?

interior storefront. pleanty of reasons like a one hour rated corridor. maybe in a school , an admin office off a corridor where you can see thru into the office or classroom. i think i have seen these online but someone told me you need wire glass for 1hr rating.

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.

Most building codes like the ICC mimic the NFPA or vice versa but rear like this: 406.3.3.1 Openings. For natural ventilation purposes, the exterior side of the structure shall have uniformly distributed openings on two or more sides. The area of such openings in exterior walls on a tier must be...

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.