Old Light-Gauge Steel Sections

[SteveGregory]

Does anyone have any tables for built-up "I" sections circa 1926? I am trying to evaluate some 6" and 8" floor joists made from a cold-formed "C" and 2 cold-formed angles to make an "I" shape.

Our client wants to convert an old college dormitory to office space. This dorm was built around 1926 which is before building codes were used in Virginia.

 

[UcfSE]

For something like that you may have to just break out the micrometer and calculator.

It's interesting to see things like this. This framing is something we might consider costly or nuts today btu when it was built it was probably a great idea. How things change...

 

[SteveGregory]

I got the micrometer out and we are heading out the door. However, I don't know what the steel yield strength might be or what the maximum allowable stress ought to be for these 1926 joists.

This is why I was hoping to find some tables.

 

[SlideRuleEra]

SteveGregory - Download "Carnegie Pocket Companion - 1923" from my website (link below). It is near the bottom of the homepage - will have the yield strength, allowable stress, etc. that you need.

http://www.SlideRuleEra.net

 

[SteveGregory]

SlideRuleEra,
Thanks for the valuble resource. However, it only has references to hot-rolled members. I am dealing with cold-formed members that are 0.068" to 0.078" thick.

 

[SlideRuleEra]

Pages 286 & 287 has information on "corrugated sheets" that cover the range of thicknesses you are considering. An allowable fiber stress of 12 KSI is given.

Perhaps you could get more specific information at the "Center for Cold-Formed Steel Structures"

http://campus.umr.edu/ccfss/about/mission.html

or
the "Cold-Formed Steel Engineers Institute"

http://www.lgsea.com/index.php

http://www.SlideRuleEra.net