1930's cast-in-place concrete reinforcing
1930's cast-in-place concrete reinforcing
(OP)
I am currently working on a project where a department store has been rennovated to meet the needs of a more industrial business. The floor framing system consists of cast-in-place concrete on 14" deep steel joists at 17" OC. There is no steel deck, only "chain male" looking reinforcing over steel straps which sit on and are transverse to the joists. A core is currently being done to determing the slab thickness and if there is any wire or rod reinforcing embedded in the slab.
Does anyone have experience with or know the history of this type of construction? We are looking to reinforce the floor for additional loading. However, at this point I don't know what it is that I would be analyzing.
Thanks.
Does anyone have experience with or know the history of this type of construction? We are looking to reinforce the floor for additional loading. However, at this point I don't know what it is that I would be analyzing.
Thanks.






RE: 1930's cast-in-place concrete reinforcing
curious to know the results of your tests.
RE: 1930's cast-in-place concrete reinforcing
If we are able to determine otherwise, I will be sure to post.
RE: 1930's cast-in-place concrete reinforcing
Some of the names are Welded Wire Fabric, Triangle-Mesh Wire Fabric, Unit Wire Fabric, Lock-woven Steel Fabric, Wisco Reinforcing Mesh, Expanded Metal, Steelcrete, Kahn Road Mesh, Corr-X-Metal, Econo, GF Expanded Metal, Rib Metal, Self-centering Fabrics, Hy-Rib, Corr-Mesh, Chanelath, Ribplex and Dovetailed Corrugated Sheets.
There are a couple of tables that give net sectional area per foot of width for some products. No info. on loading or strength.
If you post of sketch with dimensions and configuration, I will try to help you identify it.
RE: 1930's cast-in-place concrete reinforcing
Ok, I give up, how do add a photo to a post?
Shanna
RE: 1930's cast-in-place concrete reinforcing
It has a herringbone look to it.
Shanna
RE: 1930's cast-in-place concrete reinforcing
www.SlideRuleEra.net
RE: 1930's cast-in-place concrete reinforcing
http:/
Thanks.
RE: 1930's cast-in-place concrete reinforcing
I have no load tables for any of these products. If you can determine a steel area per foot of width and a strength, you may be able to calculate an approximate load capacity. The other option would be to load test an area.
RE: 1930's cast-in-place concrete reinforcing
It appears that this type of product is still being manufactured and being used. However, I have not been able to obtain any technical information, even though product literature says it can be used as reinforcing for floor and roof slabs. (One technical support person I talked to denied this.)
Architectural Graphic Standards lists a 4#/SY lath requirement for this type of construction. I will start with that.
RE: 1930's cast-in-place concrete reinforcing
where did you get the information you describe? in the handbook you posted earlier? was the expanded metal and ribs intended to act as a temporary form only, or did the expanded metal & ribs provide some strength for the slab?
did you get a copy of the handbook from ebay or elsewhere? sounds like a good reference source for older buildings.
RE: 1930's cast-in-place concrete reinforcing
This plus others (Hool & Kinne) are extremely valuable resources for anyone working with older buildings. I recommend searching eBay or used book stores for those titles or authors.
I would assume that the mesh works like reinforcing for the condition described previously.
RE: 1930's cast-in-place concrete reinforcing