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Re: Old Joist Type[Subject Prev][Subject Next][Thread Prev][Thread Next]
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- Subject: Re: Old Joist Type
- From: "Gary L. Hodgson and Assoc." <design(--nospam--at)hodgsoneng.ca>
- Date: Sat, 22 Sep 2012 08:42:28 -0400
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They sound like they may be Anthes joists which were made in Canada for a period of approx 30 years. As they were a medium sized company, they probably shipped to the USA. The joists consisted of cold-rolled gauge top and bottom chords in a bulbous W shape. The webs were always pipe or tubes crimped at the ends so they could be welded to the chords. I recommend you contact the Can Inst of Steel Construction (CISC) as they have kept a library of Anthes joists. Send to Technical assistance at Fax no 1-905-946-8574, e-mail: cisc-icca.ca. I had a job approx 4 yrs ago to install new mech units, where the building dated from the 1960's which had these and I could not analyse them for the reasons given by Will.
Gary On 2012/09/21 8:38 PM, Will Haynes wrote:
If you can't find the manufacturer ( or if you can't narrow the exact design down if you find the mfr since I assume there is no joist identification): I have used digital calipers before to rebuild old cold-formed propertiesand used AISI for the limit state checks. The pipes may be a problem since they could change thickness along the joists and unless you cut each diagonal and measure the thickness, you won't know.WH On Wednesday, September 19, 2012, Dilip Patel wrote:I need to determine joist property with following members. Top & bottom chord: W shape, 5- 1/2"x1". Digonals 1" diameter pipes, crimped at panel points., 30" c/c panels points, no verticals. About 30" jost depth, 40' joist span, 5'-0" o/c spacing, Roof joist. It appears propriety shape, not listed in SJI 60 year manual.
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