GRP Pole Planting Instructions
These instructions are intended to assist as a guideline for planting buried and surface-mount GRP poles for mounting height (MH) up to 12m.
1. Excavation of hole
Holes for the purpose of planting GRP poles can be excavated by hand or by making use of ground-moving equipment like a TLB. For buried poles an auger can also be used.
1.1. Surface-mount GRP poles
Surface-mount GRP poles should be mounted on a bolt-cage in a concrete foundation. GRP poles are available in either of the following options:
• • •
Fixed baseplate Hinged baseplate Winched baseplate
Below is a table indicating the requirements of the foundation for these options, as well as the limitations. Please note the different dimensions depending on the typical head weight and wind surface area.
2 * LEDLUME-MAXI’s
4 * LEDLUME-MAXI’s
Typical Head Weight and Wind Surface Area
Head weight: 13kg each Windage area: 0.045m 2 each
Head weight: 13kg each Windage area: 0.045m 2 each
Baseplate Code
MH
D (m)
L&B (m)
D (m)
L&B (m)
F1
≤5m
0.8
0.6
0.800
0.7
Fixed baseplate Drawing PDP-003-011
F2
≤10m
1.0
0.9
1.000
1.0
F3
≤14m
1.2
1.0
1.200
1.1
H1
≤5m
0.8
0.6
0.800
0.7
Hinged baseplate Drawing PDP-003-021
H2
≤9m
1.0
0.8
1.000
0.9
W1
≤9m
1.0
0.8
1.000
0.9
Winched baseplate Drawing PDP-003-031
W2
≤12m
1.1
0.9
1.100
1.0
W3
≤14m
1.2
1.0
1.200
1.1
Table 1 Excavation dimensions for surface-mount GRP poles
Design is based on: • 500 Pa was applied to the Poles with Shape Factor of 0,70 (in terms of SANS 1749)
• A minimum bearing pressure of 100kPa, which, according to SABS 0225, table 7 is the allowable safe bearing pressure for poor soil conditions, i.e. soft clay, poorly compacted sand and clays containing large amount of silt and organic matters. • The foundations have a safety factor against overturning of 2 and more. • D (m) is the Depth or Thickness, L&B (m) is the plan Length and Breadth of the Base required. • Quality of concrete: Class 20/20 mass concrete mixed by volume of 1:2:4 cement/sand/stone • Please note: These are recommendations and BEKA Schréder accepts no responsibilities for errors or omissions.
16 BEKAPOLE
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