Welded Wire Fabric Designation Help

[3Fan]

I'm working on a bridge rehabilitation and have the existing rehabilitation plans dated 1973. In the parapet, the original designer used "33-55 Welded Wire Fabric". We are only replacing a small chunk of the parapet and the DOT has requested we use the same W.W.F. as originally specified. I cannot seem to locate this designation (33-55) in any documentation I can dig up. Might someone have some guidance on this WWF and the equivalent in today's designation?

Thanks in advance!

 

[JedClampett]

Here's a table from the 1971 Edition of Gaylord and Gaylord, "Structural Engineering Handbook" But they only have 33-88 WWF, with 3 inch spacing each way and #8 gage wires. But I think if you put in #5 gage wires (.207 inch diameter) at 3 inch spacing, you'll be pretty close. It looks like the current designation would be 3 x 3 W3.5 x W3.5.
It's one thing to specify it, another to actually get it. Unless you have a whole lot of WWF, it's hard to get the suppliers interested in an odd size (and they're all odd sizes), so get ready to be imaginative.

 

[wannabeSE]

have you looked at the Wire Reinforcement Institute's TF 101-R-14: Historical Data on Wire, Triangular Wire Fabric/ Mesh and Welded Wire Concrete Reinforcement

http://wri.support/TF101-R-14.pdf

 

[TehMightyEngineer]

Agreed, I'd bet money it's calling out wire gauge. Our manholes are reinforced with plain wire that the shop guys call "six six - ten ten" wire. Likely written out 66-1010.

It's 10 gauge wire in a 6" x 6" grid. Written out in modern WWR designations it would be 6"x6" W1.4/W1.4.

As Jed said it's likely going to be costly to get a small order of a specific wire. I'd ask the welded wire supplier for any scraps of equivalent WWR and see if the DOT is okay with some extra reinforcement. Alternatively making a cage out of #3 grade 60 rebar will likely be more than equivalent.

Professional Engineer (ME, NH, MA) Structural Engineer (IL)
American Concrete Industries

https://www.facebook.com/AmericanConcrete/

 

[PEinc]

wannaabeSE, I tried that web site yesterday and this morning. I am blocked. The site is (erroneously?) listed as a gambling site. My IT guy has been looking into it. I assume that you are able to access the site?

http://www.PeirceEngineering.com

 

[TehMightyEngineer]

Attached the pdf until your IT department figures out the problem.

Professional Engineer (ME, NH, MA) Structural Engineer (IL)
American Concrete Industries

https://www.facebook.com/AmericanConcrete/

 

[PEinc]

Thank you, TME.

http://www.PeirceEngineering.com

 

[3Fan]

Agreed that it is 5 gauge wire at 3" spacing each way. I was not able to find an equivalent to that produced today. I like the idea of just using #3 bars considering it has to be epoxy coated also. Or just use a "stock" piece of WWF with a spacing not to exceed 6" and an equivalent area of steel. Many options.

Thanks for the help and the great links. You guys helped a bunch.