TB-9-2320-279-34

TB 9-2320-279-34

APPENDIX B

PARAGRAPH 5.1.1.1. of MIL-STD-209F

5.1.1.1. For equipment weighing less than 20,000 pounds. Each slinging provision, including the connec-

tion and the structural members, shall withstand without permanent deformation, a working load equal to

its proportionate share of the MSW (maximum shipping weight) multiplied by 3.2 and shall have an ul-

timate strength not less than 1.5 times the working load. The proportionate share of the MSW is deter-

mined by a static test load or by analysis. A static test load is performed by selecting sling lengths so that

the sling apex is over the center of gravity of the equipment and the true angle of each sling leg does not

exceed 45 degrees from the vertical. Included in each sling length is a load cell to measure the static

load in each leg when the equipment is lifted and held in a static position. For validation, the slinging

eyes or provisions shall be tested and shall withstand the required working load for not less than 90

seconds. For external helicopter, transport the requirements for slinging provisions, as stated above,

apply to equipment with a MSW to maximum projected frontal area of 60 pounds per square foot or

greater. Equipment with a MSW to maximum projected frontal area ratio of less than 60 pounds per

square foot shall meet the following requirements:

a. Each slinging provision, including its connecting structural members, shall withstand without per-

manent deformation, a working load equal to its proportionate share of the MSW, multiplied by 5.6.

b. Each slinging provision shall have an ultimate strength not less than 1.5 times the working load.

c. For validation, the slinging provisions shall be tested and shall withstand the required working load

for not less than 90 seconds. MSW for the purpose of this TB, is the value of the test weight.

B-1/( B-2 blank)

TB-9-2320-279-34 - Page 24 of 29