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Hello - apologies in advance if this is not the correct thread. I am looking into designing tapered insulation on a flat roof that requires sumps for internal drains. My understanding is that the area around the drain needs to be a 4 ft x 4 ft area with a 4 way slope into the drain at a 1/4:12...

Hello all In a scenario where steel cladding is installed directly over the exterior of a concrete tilt up wall, can the interior pressure coefficient for wind loads be eliminated since the concrete tilt up wall is effectively withstanding the interior pressures? Thank you

Hello - I'm not sure if this is the right forum, but I'm hoping someone can help provide some insignt to fire rated roof assemblies (e.g. 1-hour rated). I was able to find some references in the building code for some construction types, but it still seems unclear to me when a fire rated roof...

Hello all, Apologies if this is not in the correct forum. I'm at a cladding company and we are mainly still drafting in AutoCAD. However, we are looking to get into BIM and automation of shop drawings. Would someone be able to briefly explain the differences between Revit and Tekla? Are there...

Hi all, What are some methods used to decrease the diaphragm requirement on a roof? Some that come to mind is reducing seismic weight (e.g. using steel frame rather than concrete tilt), using a wall system with a high response modification coefficient. Thanks

Hello all, I apologize if this is the wrong forum for this question - wasn't sure where it was appropriate. I'm new to steel decking (e.g. B-deck) and was wondering if sealant is typically used at the seams, overlaps, endlaps at the steel deck since polyiso rigid board and roof membranes are...

What does everyone use as the minimum deflection limit for parapets? Footnote i in Table 1604.3 of the IBC allows cantilever members to have twice the deflection of the wall. In an application where the wall deflection limit is L/180, that would allow a parapet deflection of L/90. Does that seem...

Hello all, If we know that the seam of a 26 gauge (0.018'') thick standing seam panel disengages at 1,500 lbs, could we determine the load a 20 gauge (0.036'') standing seam panel would disengage? Assuming the properties are all the same and nothing else is the failure mode. Thank you.

Hello, Let's say I have a 100 ft x 100 ft x 40 ft building. On top of this building at the center, I have a 40 ft x 40 ft x 30 ft (L x W x H) structure. When calculating the wind loads, would the structure on the roof be considered a 70 ft elevation or 30 ft elevation? Does the answer change if...

How do metal panels typically accommodate wall girt deflections? The girts could possibly deflect 3/4'' midspan between columns. How does this affect the panels? Can someone point me in the right direction or section of code if applicable? Thanks!

Hello all, How do you calculate the maximum bending stress for a beam (multiple span) that has multiple evenly spaced point loads? For example, point loads at 12'' on center along a hat channel. Would using 3PL/16 be considered worst case moment? Thanks.

Just getting into stud walls and shear walls and have a question regarding racking shear testing - specifically ASTM E72 and ICC AC04. ASTM E72 requires that the sheathing be held off the base to allow for free rotation under racking load. This makes sense since sheathing is installed onto the...

I'm designing an exterior wall with metal panels at the edge of a property line. The wall for the building next to it is taller and is also only 2 ft - 3 ft away. Since there is so little room between the walls, how should the wind loads be accounted for in my wall? It doesn't see the full...

Hello all, I have a condition where I have a sandwich panel with metal facings let's say 4'' apart and is fastened down into steel purlins. However, there is a 3'' air gap (left out details for simplicity) between the sandwich panel and the girts. The panels are subject to a snow drag load...

Hello, I have a few questions regarding seismic lateral bracing for suspended ceilings. For acoustical lay-in ceiling panels, the building code and ASTM E580 states that four No. 12-gauge wires splayed at 90 degrees from each other at an angle not exceeding 45 degrees from the horizontal plane...

Hi Everyone, Fall protection is new to me and I am stuck with a few questions. Any help is greatly appreciated. We have an anchor system that will be used on a standing seam insulated panel. Per OSHA design requirements, the anchor was designed to a 5,000 lb single point load. Since the load...

Hi Everyone, Haven't touched anything with heat transfer in over 10 years and I don't think I'm doing this correctly. I'd appreciate it if someone take a look and guide me in the right direction. Not sure whether this is the correct forum or the HVAC/R. Thanks in advance. We're installing...

I am currently calculating wind loads for an insulated metal panel assembly and had a few questions regarding the effective wind area. The IMPs are fastened (concealed fastening) at every girt/purlin location and every width of the panel and acts as one composite when installed. In the Chapter...