Stainless Steel Screw Capacity References 2

[see_gen_notes]

Hello There!

I working on a number of connection calculators so that I can easily paste them into my work. The issue I am having is with stainless steel screw connections and that I cannot find a clear standard to calculate their capacity. AISC A370 and Design Guide 27 for the most part mentions only stainless steel bolts. I'd like to see something like AISI S100 where there is a section specifically for screws. Does anyone know of a reference that has this or do I consider screws as bolts?

 

[Lomarandil]

I'm not aware of a design standard for screw connections into hot-rolled steel. Probably because it's not common.

(Of course you would refer to NDS for screws into timber, or AISI for cold-formed steel. I'd even consider using AISI for thinner hot-rolled steel where I'm worried about the same tearout failure modes).

 

[see_gen_notes]

I am looking more at the screw itself. For pull-out, bearing, etc I would take the approiate standards. The aluminum design manual reduces the strength screws by 1.25 + 3.0 ASD and bolts are just ASD reduction. AISC A360 just mentions bolts and 'threaded parts' which I am hesitent to use for steel or stainless steel screws. What are your thoughts for determining the capacity of a screw given only the size and material?

I just found that ASCE 8-22 has a section on stainless steel screws. So I'd appreciate it if anyone as copy of section 10.3 & 10.4

 

[RenHen]

My go to resource for screws is the American Architectural Manufacturers Association Design Guide for Metal Cladding Fasteners (AAMA TIR-A9-14). They pull together information from the Industrial Fastener Institute Standards, ANSI, ASTM, AISC, ADM and a few other sources & have pretty much everything you should need to design a steel or stainless screw given the size & material in there (thread spacing is also relevant but you can make a conservative assumption there if you can't specify a particular thread standard).

 

[see_gen_notes]

That looks like THE book I need. Thanks!

 

[GallileoFacades]

As RenHen said, AAMA TIR-A9-14 (Table 20.7) would be my go to for this.