Old beam...how to determine what type it is
Old beam...how to determine what type it is
(OP)
I have been asked to determine the uniformly distributed load an existing beam can handle. The building was constructed in 1929 and the only notes on the plans regarding the beam are that it is a 15" 42plf beam. The beam is about 50' above the floor and I was able to climb above the beam on some wooden slats and take some measurements but I couldn't get exact measurements as I had to reach quite a way down to the beam. Looking in my LRFD book I see there is an S shape that is S15x42.9. I can't find any W beams that seem to match up.
How would you handle this? Is there a way to figure out exactly what type of beam this is or do I just need to make some assumptions and run the calcs based on my measurements/assumptions and then state my assumptions in my report? Thanks.
How would you handle this? Is there a way to figure out exactly what type of beam this is or do I just need to make some assumptions and run the calcs based on my measurements/assumptions and then state my assumptions in my report? Thanks.






RE: Old beam...how to determine what type it is
RE: Old beam...how to determine what type it is
Garth Dreger PE - AZ Phoenix area
As EOR's we should take the responsibility to design our structures to support the components we allow in our design per that industry standards.
RE: Old beam...how to determine what type it is
www.slideruleera.net
RE: Old beam...how to determine what type it is
RE: Old beam...how to determine what type it is
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com
RE: Old beam...how to determine what type it is
On page 20 (in the pdf from slideruleera's page) there are three rows with a 42plf weight. For the bottom row there there is only one number in column 1 which is 28. If I look at the top of page 20 and find the number 28 it says to see page 18. I go to page 18 and at the top the number 28 has a PE 1898, PE 1900 and PE 1901. This means that the beams was manufactured by A&P Roberts Company (Pencoyd Iron Works) correct?
Do I get the yield strength from the yield strength would be on page 6? Would I look under the ASTM A9 or Buildings row?
Thanks for all the help.
RE: Old beam...how to determine what type it is
RE: Old beam...how to determine what type it is