Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

RE: Old Structural Mesh BF912

[Subject Prev][Subject Next][Thread Prev][Thread Next]

Harold,

 

Thanks for the information.  If you don’t mind, I will forward your email to the engineer at WRI.  So they could save this in their database. 

 

Regards,

 

Martin Li

 

From: Harold Sprague [mailto:spraguehope(--nospam--at)hotmail.com]
Sent: Friday, September 09, 2011 3:21 PM
To: seaint(--nospam--at)seaint.org
Subject: RE: Old Structural Mesh BF912

 

Martin,
 
Yes, I know because I asked the same question in the late 1970's.
 
In that time period (1930's and 1940's) WWR spacing was called out in letter indicators for spacing as follows:
 
Designation:     Spacing:
A                          2"
B                          4"
C                          6"
D                          8"
E                          10"
F                          12"
 
The first number following the letters was the gauge of the wire in the first alphanumeric spacing
The second number in the sequence corresponded to the gauge in the second alphanumeric spacing
 
Thus BF912 was WWF 4 x 12 - 9/12  in gauge
or 
WWR 4 x 12 - W 1.7 x W 0.9 in current designation in square in per ft. 
 
The WWR you are indicating was desigened to be reinforcing in one direction and for temperature in the opposite direction in slabs spanning one way.  This information was passed down to me a long time ago by an engineer older and much wiser than me.   I wrote it down in my 1950's vintage CRSI. 
...Al Towner was his name. 

Regards, Harold Sprague
 


All,
 
We are working on a project that involves an existing reinforced concrete building with the drawings dated 1937.  The reinforcing specified for 3” slab over joists is BF912 Mesh.  Does anyone know BF912 Mesh?
 
TIA
 
Martin Li, P.E.
------------------------------------------------------------
The information transmitted is intended only for the person
or entity to which it is addressed and may contain
proprietary, business-confidential and/or privileged material. 
If you are not the intended recipient of this message you are
hereby notified that any use, review, retransmission, dissemination,
distribution, reproduction or any action taken in reliance upon
this message is prohibited. If you received this in error, please
contact the sender and delete the material from any computer. 

Any views expressed in this message are those of the individual
sender and may not necessarily reflect the views of the company. 
------------------------------------------------------------