Shakespeare Composite Structures
19845 Highway 76, Newberry, SC 29108 · 803.276.5504 Fax: 803.276.8940
www.skp-cs.com
Appendix H
TECHNICAL SERVICE
REPORT
Purpose
The purpose of this experiment was to determine the optimum bolt torque for a 5/8" galvanized steel throughbolt with 2-1/8" x 2-1/8" x 1/8" square curved galvanized steel washers installed on both sides of a T5D30 T&D pole.
Test Procedure
Three tests were performed. Holes were drilled
through both walls of a T5D30 pole at distances from the top of one
foot, three feet,
and twelve feet. A 5/8" galvanized steel bolt with square washer under
the
head was passed through each set of holes and installed with a second
galvanized
square washer and galvanized hex nut. A torque wrench was used to
tighten
the nut until the pole began to noticeable distort. The bolt torque at
this
point was then recorded. The bolt was then move to the next location
and the test repeated for the second and third locations.
Results
The first set of holes were drilled one foot down
from
the top of the pole in a region where the laminate was approximately
1/2"
thick at a turnaround. The second and third sets of holes were drilled
in
regions of the pole where the laminate was only about 1/4" thick. The
pole
began to noticeably distort at the following test loads:
DS Bradley
30 December 93
Newberry, SC