Computer Testing Supplement for IA.indb - Aviation Supplies ...

Thickness
“t” in
inches
No. of 2117-T4 (AD) protruding head rivets required
per inch of width “W”
Rivet size
No. of
Bolts
3/32 1/8 5/32 3/16 1/4 AN-3
.016 6.3 4.7 - - - - - -
.020 6.3 4.7 3.8 - - - - - -
.025 6.3 4.7 3.8 - - - - - -
.032 6.3 4.7 3.8 3.2 - - - -
.036 7.1 4.7 3.8 3.2 2.4 - -
.040 7.9 4.7 3.8 3.2 2.4 - -
.051 10.1 5.6 3.8 3.2 2.4 - -
.064 12.7 7.0 4.6 3.2 2.4 - -
.081 - - 8.9 5.8 4.0 2.4 3.2
.091 - - 10.0 6.5 4.5 2.5 3.2
.102 - - 11.2 7.3 5.1 2.8 3.2
.128 - - - - 9.2 6.4 3.5 3.2
NOTES:
a. For stringers in the upper surface of a wing, or in a fuselage, 80 percent of the number of rivets shown
in the table may be used.
b. For intermediate frames, 60 percent of the number shown may be used.
c. For single lap sheet joints, 75 percent of the number shown may be used.
ENGINEERING NOTES:
EXHIBIT 6
Number of rivets required for splices (single-lap joint) in 5052 (all hardnesses) sheet.
a. The load per inch of width of material was calculated by assuming a strip 1 inch wide in tension.
b. Number of rivets required was calculated for 2117-T4 (AD) rivets, based on a rivet allowable shear
stress equal to 70 percent of the sheet allowable tensile stress, and a sheet allowable bearing stress
equal to 160 percent of the sheet allowable tensile stress, using nominal hole diameters for rivets.
c. Combinations of sheet thickness and rivet size above the underlined numbers are critical in (i.e., will
fail by) bearing on the sheet, those below are critical in shearing of the rivets.
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