Summary of 8.5" deep Zees, t=0.073in. (nominal)

professor ben schafer's thin-walled structures research group - johns hopkins university

Testing on 3 pairs of 8.5" deep Zees with nominal thickness of 0.073 in. has been completed.

Tensile testing (3 coupons) of one of the specimens has also been completed.

Tensile coupon results (3 coupons)

specimen 8.5Z073-6, t = 0.0721 in.  (base metal), fy = 54.0 ksi, fu = 72. 6 ksi

Bending test results as of 4.20.01

Specimen	Mtest/My	Mtest/Maisi	note
8.5Z073-5E6W	0.74	0.81	damaged specimens, single panel-to-purlin screws - 12" o.c.
8.5Z073-1E2W	0.82	0.90	single panel-to-purlin screws on both sides of raised corrugation
8.5Z073-4E3W	0.89	0.98	paired panel-to-purlin screws on both sides of raised corrugation

Changes in the panel to purlin screw pattern changed strength from 0.74My to 0.89My; this is  ~20% increase in capacity.  

last updated 04/15/02