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I had mentioned it earlier in the thread. But ITW Redhead makes a Tapcon + product which is rated for use in cracked and uncracked concrete. The diameters of these anchors range from 1/4" - 1/2". I'm sure there are other small diameter concrete screw anchors out there rated for both cracked and...

I work in the same specialty as you do. The anchor size that you're looking for is going to be extremely difficult to find, especially if your looking for approved fasteners in cracked concrete. I don't think that you're going to be able to find 3/16" diameter fasteners though. I know there are...

I am designing cladding elements that will be installed on the exterior ground floor of an existing high rise (500ft mean roof height). The maximum height that the cladding elements will be installed on the building will not exceed 20 ft above grade level. Ideally, my client would like to use...

I would use the same check and look at the flange as if it were a leg of a deep leg deflection track. CFSEI has a technical bulletin on how to check the capacity of a single flange on a deep leg deflection track. You could use the same methodology to see if the flange element would fail. It may...

Check out the latest edition of Structure magazine. Beginning on page 12 of the magazine they address some of the parapet loading questions and when parapet wind loads are appropriate compared to a freestanding wall analysis. https://www.structuremag.org/?page_id=17505

Per the Aluminum Design Manual the coefficient of thermal expansion is 13 x 10^-6/Degree Fahrenheit. If you were to provide a single fixing point on one side of the upper panel flange then the pane would expect to experience a 0.00936" growth over its 5'-0" length at a change in temperature of...

Below is a snapshot from the AAMA TIR 9-14 document I reference earlier. The strength values that you're looking for should be in the document. Their are many different tables depending upon what type SS or carbon steel you're using. The different "condition types" in the tables give design...

ScottVH, You need to purchase a copy of AAMA TIR 9-14 which is a design guide by the American Architectural Manufacturers Association. The design guide gives the ultimate, yield, and shear strength of different SS alloys depending on the diameter of the fastener that is used. Please see the...

You'll need to reference each section of the ADM specification to see what the Omega factor is. Below is a snapshot from Chapter F which governs the design of members for flexure. As you can see below you'll have a couple different omega values depending on your governing failure mode and what...

Thanks all, at this point I'm going to move forward using the an R = 1.25 and Omega of 2 from Chapter 15 like strucbells stated above. I'll reach out to the Aluminum Association to see if they could provide me with any additional references, or if nothing else, bring the topic to their...

They're freestanding aluminum canopies. They're very light weight and seismic generally will not govern the design. The LFRS will either be a ordinary cantilever column or ordinary moment frame type. I was getting hung up on the fact that both of these systems have limitations of use in SDC D...

Is there a reference for various aluminum LFRS R Factors similar to what ASCE 7 gives in chapter 12? I have looked in the 2015 Aluminum Design Manual and didn't see it specifically addressed and my google search didn't turn up very much useful information. Any help would be greatly appreciated.

This excerpt it taken from the commentary of the 2015 Aluminum Design Manual - Section A.3.7 Screws "This Specification addresses aluminum screws only. There are no ASTM specifications for aluminum screws. The material for screws used to connect aluminum parts is selected to meet strength and...

I made the switch to CFS by Simpson Strong-Tie from LGBeamer a year or two ago and was concerned that my analysis files would be littered with Simpson products. The CFS software allows you to exclude the proprietary clips and track members from its output files, so your output files will look...

5052 and 3000 series alloy aluminum are the most common alloys that will be used when a formed aluminum shape is specified. 6061 aluminum is typically used for extruded aluminum shapes. When trying to form profiles out of 6061 stock bar, the material will have a much higher probability of...

I'm going to come at this from a different perspective. While I agree with the factors of safety that others have listed for fasteners that attach to wood and cold-formed steel framing, it appears to me that the table you've referred us to in the original post were average ultimate failure loads...

If you have a copy of ASCE 7-16 handy take a look at Figure 30.3-2 in the commentary section. It has a nice diagram identifying what ASCE considers a corner zone in irregular shaped buildings.

The cold-formed steel engineers institute has some pretty good technical information on load distribution members. Below are a couple of links: Research Study Using Tube Steel Distribution Headers (See page 4 of the .pdf) https://cfsei.memberclicks.net/assets/newsletters/winter-2003.pdf...

The cold-formed steel engineers institute has a great tech note on built-up members and shear flow that addresses essentially what you have going on here. Check it out. https://cfsei.memberclicks.net/assets/docs/technotes/tn-w104-10.pdf

I should have clarified. I see the small deflection equations in table 11.4 (Roarks Formulas for Stress and Strain - 8th Edition) referenced most frequently. Below is a link to Alpolic by Mitsubishi's technical bulletin which describes how they typically analyze their panels (plates) and it...