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 OSHA MINIMUM REQUIREMENT OF 200 POUNDS FORCE.
|
TEST / TEMP |
LAG BOLT |
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
|
The
tests were performed in accordance with OSHA
Construction Regulatory Guide Standard 1926.502 which applies to floor
and wall openings during construction. The procedure included horizontal
and vertical forces of 200 pounds applied to the top rail of the temporary
wood railing. The purpose of the test was to determine the load capacity
of the boot and associated anchor screws attached to typical flooring.
OSHA criteria included the height and spacing of the guardrail system,
material of construction, required test load and direction of the load.
OSHA
Regulations (Standards - 29 CFR) Fall protection systems criteria and
practices. - 1926.502
Regulations
(Standards - 29 CFR)
Guardrail Systems - Non-Mandatory
Guidelines for Complying with 1926.502(b) - 1926 Subpart M App B
