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Stacking & Loading

Off Loading By Crane

  • Pipe masses, type of stacking, outreach required and site conditions to be taken into account when determining the suitability of lifting equipment.
  • The lifting machine should be of the type, which retains the load safely in the event of a power failure.
  • When cranes are used for off-loading individual pipes, slings or lifting beams with purpose designed padded hooks should always be used.

Stacking

Three types of stacking are recommended:

Square Stacking: suitable for pipes
up to and including DN 400
Parallel stacking using timber:
suitable for pipes of all sizes
Pyramid stacking: suitable for
pipes of all sizes

Points to remember:

  • The stacking area should provide a firm foundation with a suitable approach road for vehicles.
  • During stacking and removal operations, safe access to the top of the stack is essential.
  • Pipes should be stacked on a base of raised wooden battens at least 100 mm thick and 225 mm wide.
  • The bottom layer of pipes should be securely anchored.

Stacking Heights

Diameter (mm) No. of Layers
100 16
150 14
200 12
250 10
300 8
350 and 400 7
450 and 500 6
600 4
700 3
750 and above 2

The hooks should be as wide as possible and padded with rubber to minimise damage to cement linings. Smaller sizes, up to DN 400, may be lifted with wide fabrics slings. Wire ropes or chain slings should not be used.