Rivet Patterns

TM 9-2320-303-24-2

CAB BODY REPAIR - CONTINUED

0289 00

ALUMINUM REPAIR - CONTINUED

Rivet Patterns.

Rivet patterns are denoted by rivet spacing and rivet edge distance. Rivet edge distance is distance from center of

rivet to nearest edge of sheet. Rivet spacing is defined from center of rivet to center of adjacent rivet.

Required rivet spacing is determined by strength needed in joint. General feel for strength required can be obtained

by inspecting rivet patterns in surrounding areas. Body repairs made using single rows of rivets should be per-

formed using rivet spacing not greater than 1-1/2 in (4 cm), and not less than 5/8 in (16 mm). Use 1 in rivet spacing

as general practice for repairs. Rivet spacing used in original construction may be greater due to additional strength

obtained by using foam adhesive tape. Do not use rivet edge distances less than 3/8 in (5 mm).

High-strength joints or large area patches may require use of double or multiple rows of rivets to obtain sufficient

strength.

D= DIAMETER OF RIVET

(PREFERABLY ABOUT

3X THICKNESS OF

THICKER SHEET)

DOUBLE ROW RIVETING PATTERN

3D 3D 3D

TRIPLE OR MULTIPLE ROW RIVETING PATTERN

CAUTION

Be careful not to distort original holes to prevent damage to equipment.

Care must be taken to ensure rivet hole patterns are transferred accurately in the case where part with no holes is

mated to one which already has rivet holes. Hole patterns may be transferred using one of the following:

(1)

Lay new part in place and use holes in mating part as drill template. New part must be underneath mating

part.

(2)

Use removed part as drill template by clamping old and new parts together. Parts must nest flat and rivet

flange must be undistorted.