Sixth week

From Peng

To file

11/16/2011

Test 7 

7_4x9_OSB_54mil_8'up_1'over seam_cyclic

Pre-test

43 circles

Reference displacement:1.988in.

There are two fasteners on the seam location is over-drilling, I recorded.

The vertical seam seems a little gap. 0.052’’, but it is okay.

Additional field stud at 1’ over. The additional field stud is 600S162-54mil(33Ksi).

Fasteners on the Strap are good

Two fasteners on the vertical seam miss the flange of the additional stud. Re-drill

See how vertical seam behave..

After-test.

The peak is 3588lbs,displacement is 2.230in.

The failure occure at the vertical seam and the horizontal seam.

The fasteners on the 3'x8' board at the vertical seam pull out.

Horizontal seam, from vertical seam to north chord studs, the fasteners on the top boards pull out. From vertical seam to another side chord studs, the fastener on the seam is fine. The vertical seam failure near the 8’ high come first at 35^th circle and the it goes through the bottom and the horizontal seam breaks at 38^th circle observed.

The 1’x7’ OSB  good, no fasteners pulled out.

The middle and additional filed studs connection with track, bottom and top track flange buckle.

Bottom, just two fasteners at the 3’x8’ near the vertical seam is pull out, others are fine. 

Photos

Pretest

After test