Need Old WWM Properties 4

[kxa]

I am working on a project that the record plans show "316-28 WWM" for a 6" thick slab reinforcement. I assume it is probably a stainless steel wire mesh. Does anybody know how I could get the design info for it?
Thanks

 

[KootK]

I'll throw in for SS, single wire, triangular mesh weighing 28 lb/ 100 sf per page four of this. Record my confidence level as 55%. What's the date on the drawings?

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

 

[kxa]

Thanks. I actually visited that website and looked at the table for that period (1901-1910') but missed the weight column. I don't have the entire drawing. Only in bits and pieces. I figure the building must be about 90+/- years so what you referenced would make sense. Thanks again.

 

[robyengIT]

may be this can help

 

[CELinOttawa]

I first thought 316 = Stainless Steel, but your era is all wrong for that and now believe my thought was an anachronism.

I vote for 316 being a mislead for our modern mind, and not anything "particular" in a building of this age. The 316 has something to do with physical dimensions and properties, not a type of steel.

 

[Ingenuity]

I agree with CELinOttawa - austentic 316 SS was not developed until about 1912 (the Germans and Brits claim joint fame).

Also, American Steel and Wire Co. catalog of early 1900 has the 316-28 as a noted Wire Wire Fabric STYLE, as follows:

Let me see if I can dig up the STYLE details from my reference and post details here.

 

[KootK]

Nicely done Ingenuity. OP will get much more capacity out of that. I'd love to know what 316 actually means in this context, if indeed it has a physical meaning.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

 

[Ingenuity]

So digging 'deeper':

1. "316" is longitudinal wires at 3" c/c, transverse wires at 16" c/c.​

2. "28" is #2 gauge wire longitudinal, and #8 gauge wire transverse.​

So total it all together and you get: "316-28" = #2 gauge longitudinal wires at 3" c/c, #8 gauge transverse wires at 16" c/c.

For reference: #2 gauge is 0.2625" dia. and #8 gauge is 0.1620" dia.

REF: American Welded Wire Fabric by American Steel and Wire Co.

 

[kxa]

Thank you Ingenuity. This really makes sense now because, according to the plans, the 6" thick floor (one way slab) was designed for 200 psf of LL.

 

[Ingenuity]

kxa,

You are welcome.

Curious - for your project framing (located in NY I assume), was the WWR profiled/draped over the spans to act as both TOP and BTM one-way slab reinforcing?

 

[Ingenuity]

Profiled/draped like this?

Interesting equations in the same reference:

Assuming 8' spans, 3" average to depth of steel, with stone/gravel concrete, this equation gives you a 303 psf TOTAL load capacity.