A W Smith
Philosopher
Yes, they also used some heavier rebar in the floors along with the WWF. It seems that it was used to support and keep the WWF positioned vertically prior to and during pouring. It appears it was also used as an end tie.
According to nist the 5/8 inch rebar (#5) was only used in pairs above the bridging trusses and 1/2 inch rebar (#4) at the ends of the span 3 inches from the end the testing frame
page 28 & 75 which you linked to above. The bridging trusses were spaced 13 feet 4 inches. (page 7)
http://wtc.nist.gov/NCSTAR1/PDF/NCSTAR%201-6B.pdf
Last edited: