Testing strength of Panel
Test of Strength of Sidewalk Panel|
March 23, 1909,
Panel being made as follows:
March 24, 1909.
4 ft. × 4 ft. of T bars,
1¼ in. × 1¼in. × 1/8 in.
Interlocked with channels
1½ in. × 7/16 in. × 3/16 in.
Set with our Standard Sidewalk
Prism, 4 in. × 4 in. top surface.
These were set in with
a cement mixture and allowed to stand for ten days. Then the load,
super-imposed between bearings on the panel was 2,700 lbs., and after
standing for twenty-four hours there did not appear to be any deflection
After twenty-four hours
of above test, 3,420 lbs. was added to above weight, making 6,120 lbs. in
all, the panel showing no deflection whatever. This test demonstrates
the fact that this panel would carry a load of over 300 lbs. to the
square foot without making any perceptible deflection.