5.6  Bolts

[German version]

Hexagon-head bolts (EN ISO 4016), cup-head square-neck bolts (ISO 8678) and threaded rods are used for bolted connections.

Bolted connections are used for jointing lumber components, particularly on the floor of the box, and for securing technical packaged items to the floor of the box.

The permitted loads on the bolts must be determined according to DIN 1052 2004-08.

The key factors to be considered when dimensioning the connections for securing packaged goods to the floor are the horizontal acceleration values for the means of transport and handling equipment used.

Processing notes

The following aspects must be taken into account to achieve the best possibly quality for a bolted connection:

  • The bolt holes must be drilled to fit. Play should not exceed 1 mm.

  • Bolts must have a diameter of at least 10 mm, and at least 12 mm for lumber thicknesses in excess of 8 cm.

  • The distance between individual bolts and between a bolt and the end of the lumber in the direction of the grain must be at least 10 cm.

  • Plain washers compliant with DIN 436 1990-05 or DIN 440 2001-03 must be inserted at the head and nut end of bolted connections. The dimensions of washers used for load-bearing connections are listed in Table 11.

  • To prevent a bolted connection from loosening, locknuts must be used or additional lock washers must be inserted between the plain washers and the nuts. This also applies to threaded rods.

Bolt diameter M 12 M 16 M 20 M 22 M 24
Washer thickness [mm] 6 6 8 8 8
Outer diameter of round washer [mm] 58 68 80 92 105
Edge length of square washer [mm] 50 60 70 80 95

Table 11: Bolt dimensions

Figure 43: Bolts and screw elements

Ring bolts are, for instance, used to secure the packaged item with ropes and belts. The ring bolts can be screwed onto the bolts of the end beams:

Figure 44: Ring bolt on end beam