The BEKAPOLE is a GRP Pole range and is used not only for its resistance to corrosion, but is preferred by architects, developers and local authorities for its aesthetic appearance, strength, ease of installation and inherent safety for road users.
BEKAPOLE Glass fibre reinforced polyester (GRP) pole range
BEKAPOLE Success Story
In the late Seventies, BEKA Schréder was approached by the authorities in Namibia to find a solution to the corrosion which was damaging the then conventional materials used for lighting poles, such as steel, wood and concrete. Namibia is not only one of the world’s most atmospherically corrosive environments, but it also has large tracts of land with highly corrosive soils. The resulting research into non-corrosive materials has culminated in the choice of the glassfibre reinforced polyester (GRP) pole. This material exceeded the expectations of the authorities, as it not only offered the answer to the excessive corrosion, but also offered convincing strength properties combined with an appealing finish and design. BEKA Schréder subsequently bought the expertise and machinery for the manufacture of filament wound GRP poles from a leading German manufacturer and, since commencement of production in July 1978, has manufactured several hundreds of thousands of GRP poles for the African subcontinent and beyond. BEKA Schréder has perfected the process by adopting the latest technology. In 1989 BEKA Schréder became the first manufacturer to be awarded the ISO 9002 accreditation for its quality management of its pole and luminaire manufacturing plant. BEKA Schréder’s production is constantly subjected to the stringent quality demands which this accreditation implies. Through its commitment to consistent quality, BEKA Schréder has become one of the world’s leading manufacturers of GRP poles. BEKA Schréder’s GRP poles are used for highways, main roads, residential streets, sportsfields, decorative lighting, area lighting, post-top lighting, perimeter security, parks and gardens, as well as for flag poles. The BEKAPOLE, as it became known, is used not only for its resistance to corrosion, but is preferred by architects, developers and local authorities for its aesthetic appearance, strength, ease of installation and inherent safety for road users.
2 BEKAPOLE
Applications
The BEKAPOLE has virtually unlimited applications. It can be manufactured to any requirement relating to the number and configuration of luminaires to be mounted, inclusive of any special colour.
Main roads
Urban roads
Perimeter security
Sports facilities
Parking area lighting
Flag poles
Various decorative lighting applications
3
Key Advantages
Light Weight The low mass saves handling, transport and erection costs during installation: • Low handling costs: No extra equipment needed to load or offload the poles • Low transport costs: Save on transport costs due to the poles' low weight and the higher stacking height on road freight • Low installation costs: No extra equipment is needed to erect the poles
Vandal Resistant High impact strength of polyester gel coat and glass filament wound structure and material offering no scrap value, therefore very low risk of theft.
Non-Corrosive No above- or below-ground corrosion in salt climates or acid soil.
Corrosion of steel pole
Maintenance-Free No corrosion or decay ensures that the surface coat of the pole will not require maintenance.
4 BEKAPOLE
Longevity Over time, BEKA Schréder fibreglass poles will outlast wood, concrete, steel and aluminium under similar climatic conditions.
Versatility A wide range of spigots, floodlight mountings, baseplates and decorative arrangements ensure a product for almost every application.
Non-Conductive Perfect electrical insulation prevents accidental electrocution by faulty wiring.
Low Inertia A reduction in personal injury and damage to vehicles in road accidents.
High Bending Strength Engineered to withstand a wind pressure of 500 Pa inclusive of 0.20m 2 luminaire area with less than a 5% deflection of the mounting height. This relates to a wind speed of 103.9km/h. Any higher wind speeds must be calculated separately.
Sustainable The manufacturing process for glass fibre poles is much kinder to the environment than metal or concrete products.
5
Myths
“Glass fibre poles whip around in the wind...” Due to the unique process of glass filament winding, standard BEKA Schréder GRP poles are designed to withstand a wind pressure of 500 Pa on a projected luminaire area of 0.20m 2 . Some of our most satisfied customers are situated in coastal environments subjected to high winds. All BEKA Schréder GRP poles are designed and manufactured with a safety factor of 2,5.
“Glass fibre poles are deteriorated by sunlight...” The ultraviolet rays in sunlight will deteriorate only unprotected glass fibre. This has been eliminated by pigmenting the resin and the application of a polyester gel coat with UV inhibitors to the surface of the pole structure.
“Glass fibre poles cannot support big headloads...” Each BEKA Schréder glass fibre pole is individually engineered by factoring in the weight, projected area and windloading requirements of the installation site. The most demanding installation is easily achieved by a pre- engineered BEKA Schréder glass fibre pole.
“Glass fibre poles are made out of plastic...” BEKA Schréder glass fibre poles are manufactured by the filament winding process where continuous glass rovings are fed through a polyester resin bath and wound at an even tension onto a rotating mandrel, resulting in a mass glass to resin ratio of 70:30, making full use of the tensile strength of the glass filament which is more than that of steel.
Hinged glass fibre pole
Winched glass fibre pole
Heavy duty access door cover
Glass filament windings
6 BEKAPOLE
Manufacturing
A mechanised manufacturing process utilises a fully automated track mounted roving machine as both the glass filament windings and resin are applied. This sophisticated high quality manufacturing method optimises the usage of materials, thus considering costs, resources and our environment. The filament winding machine is operated at calculated speeds whilst moving alongside the rotating mandrels to achieve maximum winding angles. BEKA Schréder GRP poles are manufactured through the filament winding process whereby continuous glass rovings are fed through a polyester resin bath and wound at an even tension onto a rotating mandrel, resulting in a mass to resin ratio of 70:30 and making full use of the tensile strength of the glass filament which is more than that of steel. After the winding process has been completed, the glass filament structure is cured and then removed from the mandrel for surface preparation. A base coat of polyester resin that complies with the requirements of SANS 1749 is applied, thereafter the cured structure is further machined to receive a final gel coat that is applied to a uniform thickness of between 250 and 500 microns. In the mechanical assembly process, the pole is machined to provide holes for baseplate hookbolts, cable entries, access door openings, as well as any other details required. Spigot arrangements and surface baseplates, where required, are moulded into the pole and secured in position with locking screws. Throughout the manufacturing process, the pole is subjected to stringent quality checks and tests.
Automated track mounted winding machine
Accurate, consistent computer-controlled winding process
Winding of glass filament
Drilling machine
7
Design & Construction Details
Material The pole is constructed by the filament winding process to achieve optimum results for strength and rigidity. The filament winding process is continuously applied with uniform tension onto a rotating mandrel, resulting in a minimum mass glass to resin ratio of 70:30. The surface is seamless, smooth and tapered. Finishing coat The material of the finishing coat is a gel coat that complies to SANS 1749 and is applied to a uniform thickness of between 250 and 500 microns, providing a weatherproof, UV-resistant, flame-resistant and impact- strong surface in the colour specified. Mechanical properties A standard pole supporting a luminaire with a wind surface of 0.20m 2 may not have a pole top deflection of more than 5% of its height above ground when subjected to a basic wind pressure of 500 Pa. A safety factor of 2.5 times the total maximum windload is applicable. Material system The pole is manufactured in accordance with SANS 1749 under the ISO 9002 quality system.
Access opening If an access opening is required, the cut-out is covered by an access door cover manufactured from glass filled nylon impregnated in the same colour as that of the surface coat. It is secured to the pole by two stainless steel Allen head captive screws into M4 brass inserts embedded in the pole. Cable entry A cable entry with a minimum diameter of 34mm is provided at a minimum depth of 400mm below the ground surface. Glandplate A hot dipped galvanised glandplate, suitable for gland no. 0 or 1, complete with terminal block and DIN rail for a miniature circuitbreaker, is provided and is mounted to a bolt provided in the access opening. Baseplate Poles for direct embedment in the ground can be provided with a square hot dipped galvanised baseplate complete with 2 x hot dipped galvanised steel hookbolts and nuts. Base-mounted poles have a hot dipped galvanised flange plate that can be bolted to a foundation which is designed to withstand the forces the pole will experience in service.
Century City Square, Cape Town
Hout Bay Harbour, Cape Town
8 BEKAPOLE
Relevant Pole Data and Other Factors
Corresponding Calculated Key Values
Load to be applied in pole-top deflection test (N)
Maximum permitted deflection in pole-top deflection test (mm)
Diameter of pole at ground level (mm)
Mounting height (m)
Total length of pole (m)
2.0
2.6
110
135.4
100
2.5
3.1
120
143.4
125
3.0
3.6
128
152.0
150
3.5
4.1
135
161.0
175
4.0
4.6
146
171.6
200
4.5
5.2
155
182.3
225
5.0
5.7
164
193.6
250
5.5
6.3
173
205.4
275
6.0
6.9
170
213.7
300
6.5
7.4
178
225.9
325
7.0
8.0
186
238.6
350
7.5
8.6
194
251.8
375
8.0
9.2
202
265.5
400
8.5
9.8
210
279.7
425
9.0
10.4
218
294.3
450
9.5
11.0
226
309.4
475
10.0
11.6
237
326.8
500
11.5
13.4
290
463.4
575
12.0 600 1. Relevant pole data is based on a shape factor of 0.7 and a calculated wind pressure of 500.14 Pa (relating to a wind speed of 103.9km/h). 2. Corresponding calculated key values are based on a luminaire surface area of 0.2m 2 with a shape factor of 1. NOTES: 14.0 300 504.0
WITS University, Johannesburg
Amphitheatre, Durban
Wine distribution centre, Cape Town
9
Dimensions
ø76
MH m
HT m
E m
U m
D mm
C mm
Description
K 18 76 20
2.0 2.6 0.6 0.5
121
400
K 18 76 25
2.5
3.1
0.6 0.5
131
400
K 18 76 30
3.0 3.6 0.6 0.5 135 400
K 18 76 35
3.5
4.1
0.6 0.5 146 400
K 18 76 40
4.0 4.6
0.6 0.5 157 400
K 18 76 45
4.5
5.2
0.7
0.5 168 400
K 18 76 50
5.0 5.7
0.7
1.0 177 400
K 18 76 55
5.5
6.3
0.8 1.0 180 400
K 18 76 60
6.0 6.9 0.9 1.0 184 400
K 18 76 65
6.5
7.4 0.9 1.0 192 400
K 18 76 70
7.0 8.0 1.0 1.0 202 400
K 18 76 75
7.5
8.6
1.1
1.0 210 400
K 18 76 80
8.0 9.2
1.2
1.0 220 500
K 18 76 85
8.5
9.8 1.3
1.0 230 600
K 18 76 90
9.0 10.4 1.4
1.0 230 600
K 18 76 95
9.5 11.0 1.5
1.0 240 700
HT Total length MH Mounting height D Base diameter
K 18 76 100
10.0 11.6 1.6
1.0 250 800
K 18 76 110
11.0 12.8 1.8
1.0 310 800
K 18 76 115
11.5 13.4 1.9
1.0 320 800
C Depth of cable entry U Access door height E Buried depth
K 18 76 120
12.0 14.0 2.0 1.0 340 1 000
D
NOTE: All measurements are approximate
Colour Chart (For indication purposes only)
Pigment Paste Colour
Comparative RAL Colour
K100 White K200 Black
RAL 9016 RAL 9017 RAL 5012 RAL 5017 RAL 3020 RAL 6005 RAL 6001 RAL 1018 RAL 1001 RAL 1028 RAL 8025 RAL 8017 RAL 7045 RAL 7016 RAL 7047 RAL 9022
K302 Paris Blue
K340 Strong Blue
K100 White
K200 Black
K302 Paris Blue K340 Strong Blue K400 Signal Red
K530 Mid Bruns Green
K400 Signal Red
K530 Mid Bruns Green
K541 Brilliant Green
K600 Canary (Light) Yellow
K541 Brilliant Green
K600 Canary (Light) Yellow
K640 Sandstone K641 Traffic Yellow K705 Dark Earth
K705 Dark Earth
K713 Chocolate Brown
K640 Sandstone
K641 Traffic Yellow
K713 Chocolate Brown K913 Mineral Grey K916 Charcoal K918 Birch Grey K919 Pearl Light Grey
K916 Charcoal
K913 Mineral Grey
K918 Birch Grey
K919 Pearl Light Grey
10 BEKAPOLE
Spigot Options
Spigot Mounting
PDP-015-001
PDP-015-002
PDP-015-003
PDP-017-001
PDP-017-003
PDP-017-005
PDP-017-007
Floodlight Mounting
PDP-021-003
PDP-021-004
11
Bracket Options
Decorative Lantern Arrangements
PDP-025-001 - Type A
PDP-025-001 - Type B
PDP-025-001 - Type C PDP-025-001 - Type D (Single)
PDP-025-001 - Type D (Double)
PDP-025-002
Decorative Bracket Options
KORDA-ZA
CURV-T
ITO-ZA (750mm)
ITO-ZA (1250mm)
CURV-N (500mm)
CURV-N (1250mm)
CURV-B (500mm)
CURV-B (1250mm)
Our decorative brackets support a weight of up to 13kg.
12 BEKAPOLE
Options, Accessories & Spare Parts
Drawing No. For details, refer to Technical Drawings brochure
Type
Article Description
Remark
Heavy duty pole version with spigot, 76*80-100mm, moulded into straight pole
SPECIAL POLE
A
N/A
PDP-015-001 PDP-015-002 PDP-015-003
BEKAPOLE Ø60/76mm spigot insert (refer to drawing for options)
B
Moulded into straight pole, hot dipped galvanised or stainless steel (Grade 304)
Single side entry spigot, 1*Ø42mm
B, C
PDP-017-001
Double side entry spigot, 2*Ø42mm
A, B, C
PDP-017-003
Triple side entry spigot, 3*Ø42mm
A, B, C
PDP-017-005
Quadruple side entry spigot, 4*Ø42mm
A, B, C
PDP-017-007
Floodlight mounting for single floodlight - Type of floodlight to be specified Floodlight mounting for double floodlights - Type of floodlights to be specified Floodlight mounting for single floodlight - Type of floodlight to be specified Floodlight mounting for double floodlights - Type of floodlights to be specified
A, B
PDP-021-003
Hot dipped galvanised
A, B, C
PDP-021-004
A, B
PDP-021-003
Stainless steel (Grade 304)
A, B, C
PDP-021-004
2 Arm version - Type A
A, E
3 Arm version - Type A
A, E
PDP-025-001
4 Arm version - Type A
A, E
2 Arm version - Type B
A, E
3 Arm version - Type B
A, E
PDP-025-001
4 Arm version - Type B
A, E
2 Arm version - Type C
A, E
Hot dipped galvanised, painted in the colour to be specified
3 Arm version - Type C
A, E
PDP-025-001
4 Arm version - Type C
A, E
4 + 1 Arm version - Type C
A, E
2 Arm version - Type D
A, E
3 Arm version - Type D
A, E
PDP-025-001
4 Arm version - Type D
A, E
4 + 1 Arm version - Type D
A, E
2 Arm version - Type E
A, E
PDP-025-002
KORDA-ZA
A, E
CAD-0052165
CURV-T
A, E
CAD-0056820
ITO-ZA (750mm)
A, E
CAD-0056280
Hot dipped galvanised, painted in the colour to be specified
ITO-ZA (1250mm)
A, E
CAD-0056281
CURV-N (500mm)
A, E
CAD-0060978
CURV-N (1250mm)
A, E
CAD-0056823
CURV-B (500mm)
A, E
CAD-0060946
CURV-B (1250mm)
A, E
CAD-0056713
13
Drawing No. For details, refer to Technical Drawings brochure
Type
Article Description
Remark
Glandplate assembly, Type GP/2/0/E/TB/MCB, consisting of 2 holes 20mm diameter, suitable for Gland No 0 or 1, complete with terminal block, 4 way, 30 Amp and DIN rail for MCB Miniature circuitbreaker, 5A/5kA, for total line starting currents of less than 4A Miniature circuitbreaker, 10A/5kA, for total line starting currents of more than 4A, but not exceeding 8 Amp
GLANDPLATE ASSEMBLY
PDP-011-001
N/A
MINIATURE CIRCUITBREAKER
N/A
Baseplate assembly, 300*300*1.6mm Baseplate assembly, 300*300*6mm Baseplate assembly, 400*400*1.6mm Baseplate assembly, 400*400*6mm
Hot dipped galvanised, complete with hookbolts and nuts
DETACHABLE BASEPLATE
PDP-003-001
Baseplate assembly, 500*500*1.6mm, standard from 12.8m total length poles Baseplate assembly, 500*500*6mm, optional from 12.8m total length poles
F1 - for mounting height up to 5m
A
PDP-003-011 and PDP-003-012
Hot dipped galvanised
F2 - for mounting height up to 10m
A
FIXED BASEPLATE FOR SURFACE MOUNTING
F3 - for mounting height up to 12m
A
F1 - for mounting height up to 5m
A
Stainless steel (Grade 304)
F2 - for mounting height up to 10m
A
PDP-003-011
F3 - for mounting height up to 12m
A
H1 - for mounting height up to 5m
A, D
Hot dipped galvanised
HINGED BASEPLATE FOR SURFACE MOUNTING
PDP-003-022
H2 - for mounting height up to 9m
A, D
H1 - for mounting height up to 5m
A, D
Stainless steel (Grade 304)
PDP-003-022
H2 - for mounting height up to 9m
A, D
W1 - for mounting height up to 9m
A, D
WINCHED BASEPLATES FOR SURFACE MOUNTING, HOT DIPPED GALVANISED
PDP-003-030 and PDP-003-031
W2 - for mounting height up to 12m
A, D
W1 - for mounting height up to 9m
WINCH ASSEMBLY
PDP-003-080
W2 - for mounting height up to 12m
9.2m total length, 8m mounting height
FLAGPOLES, complete with rope and rope attachment
PDP-027-001
10.4m total length, 9m mounting height
8m mounting height
MUSHROOM TOP FLAGPOLES, complete with rope and rope attachment
PDP-027-002
9m mounting height
SPARE PARTS
Heavy duty access door
E
PDP-040-001
REMARK KEY : A - Special pole required
B - Wound-in C - Slip-over D - Limitations for maximum headweight of 15kg and 0.2m 2 wind surface area apply to standard pole E - Specify required colour
Special versions are available for all items
14 BEKAPOLE
Ordering Information
Example: K187660 K918SF2 SE151DST25%
Extra strength XX% 10% up to 100%
ID Mounting Height
Colour finish
Base
Spigot
Flood
Flag pole
Pole door
XX XX = MH Thus: 60 6.0m MH (Max. 12m mounting height)
K100 White (RAL9016) K200 Black (RAL9017) K302
BUR Buried SF... Surface
No description No spigot S60D2 Spigot HDG 60mmx225mm S76D2 Spigot HDG 76mmx225mm S76D4 Spigot HDG 76mmx450mm SE151
FL761 Flood mounting single HDG FL762 Flood mounting double HDG FS761 Flood mounting single S/Steel FS762 Flood mounting double S/Steel
FLAGS Standard flag pole, complete with rope FLAGM Mushroom flag pole assembly, complete with rope
DNO No pole door DST Standard pole door
mounted (F1/F2/F3) HN... Hinged suface mounted (H1/H2) WN... Winched surface mounted (W1/W2)
Paris Blue (RAL5012) K340 Strong Blue (RAL5017) K400
Signal Red (RAL3020) K530 Mid Bruns Green (RAL6005) K541 Brilliant Green (RAL6001) K600 Canary (Light) Yellow (RAL1018) K640 Sandstone (RAL1001) K641 Traffic Yellow (RAL1028) K705 Dark Earth (RAL8025) K713 Chocolate Brown (RAL8017) K913 Mineral Grey (RAL7045) K916
Spigot HDG 60/76mm x 42mm x 150mm x 1 /15° SE152 Spigot HDG 60/76mm x 42mm x 150mm x 2 /15° SE153 Spigot HDG 60/76mm x 42mm x 150mm x 3 /15° SE154 Spigot HDG 60/76mm x 42mm x 150mm x 4 /15° SE001 Spigot HDG 60/76mm x 42mm x 150mm x 1 /0° for LEDlume SE002 Spigot HDG 60/76mm x 42mm x 150mm x 2 /0° for LEDlume
For a list of buried baseplates,
boltcages and winch assemblies, see table below
S60S2 Spigot S/Steel 60mmx225mm S76S2 Spigot S/Steel 76mmx225mm S76S4 Spigot S/Steel 76mmx450mm SS151
Charcoal (RAL7016) K918
Birch Grey (RAL7047) K919 Pearl Light Grey (RAL9022)
Spigot S/Steel 60/76mm x 42mm x 150mm x 1 /15° SS152 Spigot S/Steel 60/76mm x 42mm x 150mm x 2 /15° SS153 Spigot S/Steel 60/76mm x 42mm x 150mm x 3 /15° SS154 Spigot S/Steel 60/76mm x 42mm x 150mm x 4 /15° SS001 Spigot S/Steel 60/76mm x 42mm x 150mm x 1 /0° for LEDlume SS002 Spigot S/Steel 60/76mm x 42mm x 150mm x 2 /0° for LEDlume
Buried Baseplate, Bolt Cages & Winched Assembly: Baseplate Assembly 300x300x1.6mm HDG Baseplate Assembly 400x400x1.6mm HDG Baseplate Assembly 500x500x1.6mm HDG Baseplate Assembly 300x300x6mm HDG Baseplate Assembly 400x400x6mm HDG Baseplate Assembly 500x500x6mm HDG Boltcage F1 2.0m to 5.0m MH Boltcage F2 5.5m to 9.5m MH Boltcage F3 10.0m to 12.0m MH Boltcage H1 2.0m to 5.0m MH Boltcage H2 5.5m to 9.0m MH Boltcage W1 2.0m to 9.5m MH Boltcage W2 10.0m to 12.0m MH
Winch Assembly 9m W1 Winch Assembly 12m W2
15
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
D
B
L
Figure 1 Dimensions of foundation-hole for surface-mount poles
1.2. Buried GRP poles
Surface-mount poles comes in different lengths and the planting depth of the pole depends on the length and mounting height of the luminaire. Details pertaining to the excavation needed can be seen in the table below:
2 * LEDLUME-MAXI’s
Typical Head Weight and Wind Surface Area
Head weight: 13kg each Windage area: 0.045m 2 each
Pole Height (HT) (m)
MH (m)
D (m)
L&B (m)
H (m)
2.6
2.0
0.6
0.75
0.6
3.1
2.5
0.6
0.75
0.6
3.6
3.0
0.6
0.75
0.6
4.1
3.5
0.6
0.75
0.6
4.6
4.0
0.6
0.75
0.6
5.2
4.5
0.7
0.75
0.6
MH
5.7
5.0
0.7
0.75
0.6
6.3
5.5
0.8
0.75
0.6
HT
6.9
6.0
0.9
0.75
0.6
7.4
6.5
0.9
0.75
0.6
8.0
7.0
1.0
0.9
0.6
8.6
7.5
1.1
0.9
0.6
9.2
8.0
1.2
0.9
0.6
9.8
8.5
1.3
0.9
0.6
10.4
9.0
1.4
0.9
0.6
11.0
9.5
1.5
0.9
0.6
11.6
10.0
1.6
0.9
0.6
D
13.4
11.5
1.9
0.9
0.6
14.0
12.0
2.0
0.9
0.6
Figure 2 Dimensions of buried poles
Table 2 Excavation dimensions for buried GRP poles
17
D
D
B
L
H
Figure 3 Dimensions of excavated hole for buried poles
Figure 4 Dimensions of drilled hole for buried poles using an auger
2. Backfilling of buried poles The backfilling mix should have a composition of soilcrete 1:10, based on standard soil condition of 150kPa. Backfilling the pole hole should be done in layers of 250mm and compacted with a hand-rammer. The soil should be compacted evenly around the pole, and care should be taken that the pole does not lean to one side during compacting. Continue the backfill and compacting process until the hole is filled. If a stepped hole was used the same applies, and the entire hole must be filled and compacted.
Compact backfill in 250mm layers
D
L/H
Figure 5 Backfilling and compacting the hole
18 BEKAPOLE
www.beka-schreder.co.za
Designed and manufactured by BEKA Schréder (Pty) Ltd
Copyright © BEKA Schréder (Pty) Ltd 2019 – 13 West View Road – Olifantsfontein (South Africa) • The information, descriptions and illustrations herein are of only an indicative nature. Due to advanced developments, we may be required to alter the characteristics of our products without notice. As these may present different characteristics according to the requirements of individual countries, we invite you to consult us. 2022-01
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