OWSJ / concrete precast composite system identification
OWSJ / concrete precast composite system identification
(OP)
I saw a different floor and roof system last week & I can't find the manufacturer. It's a building in southern Ontario (Salvation Army church), built in the early 1960s that looks essentially like a Hambro composite system: OWSJ and concrete composite, except they were precast in 4' wide planks, not cast in place. The joists are 32' span at 2' centres, 12" from each edge of the planks. The floor planks are 2 1/2" thick concrete and there is 15" of exposed joist depth. There are steel tabs visible in the joints between the slabs that apparently were welded together for load transfer. The new owners want to change some things & I'm trying to find a quick way to get the original capacity. Anyone seen these before and know of any design tables?






RE: OWSJ / concrete precast composite system identification
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RE: OWSJ / concrete precast composite system identification
Not necessarily a system, but, an innovation by a contractor? It would provide lateral support for the OWSJ as well as a form for the concrete topping.
Dik
RE: OWSJ / concrete precast composite system identification
Possibly Hambro done by an innovative contractor but was Hambro around in 1962?
RE: OWSJ / concrete precast composite system identification
Check out: http://www.aerialprecastconcrete.com/engineering/
"Produced at our facility, Aerial™ floor units are fabricated in widths of up to 8 feet and lengths of up to 40 feet; are typically composed of 17″ deep steel bar joists embedded into 3″ concrete panels (depth of joists may vary), at 5,000psi and poured around embedded 6/6, i.e. 6″x6″ welded wire mesh, into slightly cambered molds. They are then transported to the site and placed at 3″ on top of the tie, bond or steel beams of the structure; precisely adjusted and welded together at the ends. The remaining joints are then grouted."
RE: OWSJ / concrete precast composite system identification
RE: OWSJ / concrete precast composite system identification