Engineering
Testing - Text prepared by Stress Engineering Services
SUMMARY
OF TESTS PERFORMED ON THE SAFETY BOOT®
PERFORMED
FOR
SAFETY MAKER, INC.
PERFORMED
BY
STRESS ENGINEERING SERVICES
HOUSTON TEXAS
W. T. Asbill, P.E.
JULY
15, 2002
STRESS ENGINEERING SERVICES
(SES) IS A MULTI-DISCIPLINE ENGINEERING COMPANY THAT SERVES A
VARIETY OF INDUSTRIES. ONE OF THE SERVICES PROVIDED BY SES IS
A TEST FACILITY IN WHICH A VARIETY OF PRODUCTS ARE TESTED.
A
SERIES OF TESTS WERE PERFORMED FOR SAFETY MAKER ON THEIR SAFETY
BOOT®. THE PURPOSE OF THE TESTS WERE TO DETERMINE THE MAXIMUM
LOAD THE BOOT AND FLOOR ASSEMBLY COULD WITHSTAND. THE TESTS WERE
PERFORMED ACCORDING TO OSHA 1926.502 WHICH IS A CONSTRUCTION REGULATORY
GUIDE FOR FALL PROTECTION GUARDRAIL SYSTEMS. THIS GUIDE REQUIRES
THAT THE GUARDRAIL SYSTEM MUST BE ABLE TO WITHSTAND A FORCE OF
200 POUNDS AT A HEIGHT OF 42” ABOVE THE FLOOR.
A
NUMBER OF TESTS WERE PERFORMED USING A VARIETY OF BOLTS AND SUBFLOORS.
BELOW IS A TABLE AND PLOT THAT SUMMARIZES SOME OF THE TEST RESULTS.
IN ALL TESTS SHOWN, THE SAFETY BOOT ASSEMBLY EXCEEDED THE OSHA
REQUIREMENT OF 200 POUNDS FORCE. THE TESTS HAVE SHOWN THAT IT
IS IMPORTANT TO HAVE THE CORRECT COMBINATION OF LAG BOLT SIZE,
WASHER SIZE, NUMBER OF LAG BOLTS AND FLOOR MATERIAL THAT THE SAFETY
BOOT IS ATTACHED TO. SOME FLOOR MATERIALS, SUCH AS PLYWOOD LESS
THAN 1-1/8” THICK AND OSB, ARE INSUFFICIENT BY THEMSELVES AND
MUST HAVE ADDITIONAL SUPPORT (2” PINE BOARD) FOR THE BOLTS TO
PENETRATE. WITH THE ATTACHMENT COMBINATIONS SUMMARIZED, THE
SAFETY BOOT EASILY EXCEEDED THE OH&S MINIMUM REQUIREMENT.
|
|
|
FENDER
WASHER
|
SUBFLOOR
MATERIAL
|
MAX.
FORCE LBS.
|
|
1: Room
|
3/8" X 3"
|
3/8" X 1-1/4"
|
23/32" Sturd-I-Floor® Plywood & 2" X 10"
Yellow Pine
|
488
|
|
2: Room
|
3/8" X 3"
|
3/8" X 1-1/4"
|
23/32" Sturd-I-Floor® Plywood & 2" X 10"
Yellow Pine
|
502
|
|
3: Room
|
3/8" X 3"
|
3/8" X 1-1/4"
|
23/32" Sturd-I-Floor® Plywood & 2" X 10"
Yellow Pine
|
467
|
|
4: 0 F
|
3/8" X 3"
|
3/8" X 1-1/4"
|
23/32" Sturd-I-Floor® Plywood & 2" X 10"
Yellow Pine
|
680
|
|
5: -13 F
|
3/8" X 3"
|
3/8" X 1-1/4"
|
23/32" Sturd-I-Floor® Plywood & 2" X 10"
Yellow Pine
|
574
|
|
6: -15 F
|
3/8" X 3"
|
3/8" X 1-1/4"
|
23/32" Sturd-I-Floor® Plywood & 2" X 10"
Yellow Pine
|
542
|
|
7: Room
|
3/8" X 2"
|
3/8" X 1-1/4"
|
2" X 10" Yellow Pine
|
420
|
|
8: Room
|
3/8" X 2"
|
3/8" X 1-1/4"
|
2" X 10" Yellow Pine
|
407
|
|
9: Room
|
3/8" X 2"
|
3/8" X 1-1/4"
|
2" X 10" Yellow Pine
|
435
|
|
10: Room
|
3/8" X 2"
|
3/8" X 1-1/2"
|
2" X 10" Yellow Pine
|
337
|
|
11: Room
|
3/8" X 2"
|
3/8" X 1-1/2"
|
2" X 10" Yellow Pine
|
405
|
|
12: Room
|
3/8" X 2"
|
3/8" X 1-1/2"
|
2" X 10" Yellow Pine
|
430
|
|
13: Room
|
3/8" X 2"
|
3/8" X 1-1/2"
|
1-1/8" Sturd-I-Floor® Plywood
|
387
|
|
14: Room
|
3/8" X 2"
|
3/8" X 1-1/2"
|
1-1/8" Sturd-I-Floor® Plywood
|
530
|
|
15: Room
|
3/8" X 2"
|
3/8" X 1-1/2"
|
1-1/8" Sturd-I-Floor® Plywood
|
504
|
