Products

HT6 High Clearance Arches

Ground Support Systems High Clearance Arches can be combined with any of the Heavy Duty 3.6m, 4.3m, 6.1m or 7.3m long shoring boxes, giving 2300mm of clearance beneath the arch with internal dimensions from 1830mm to 6100mm of clearance between the panels. These are ideal for laying large diameter pipes, multiple pipes, box culverts, boring pits, pipe caps, installing GPT’S etc.

Standard features

  • 2300mm clearance beneath arch
  • Minimum width internal 1830mm
  • Maximum width internal 6100mm 
  • Simple design for easy assembly and installation.
  • Professional Engineer design and certification

Conforms to Australian Standard AS 4744.1-2000

 MODEL & DESCRIPTION WeightPipe ClearanceMaximum lateral earth pressureMaximum Allowable Depth of Cut (metre)
  Kg. mm. kPa. B Soil C-60 Soil C-80 Soil
HIGH CLEARANCE SEE BELOW FOR EXTENSIONS Min.Internal—1830 Max. Internal—6100 998.8 2300 75 7.9 6.0 4.4
 MODEL & DESCRIPTION Weight
  Kg.
ARCH-SP14-EXT1(1’Extension) 305 105
ARCH-SP14-EXT2(2’Extension) 610 136
ARCH-SP14-EXT4(4’Extension) 1220 168
ARCH-SP14-EXT6(6’Extension) 1830 232
ARCH-SP14-EXT8(8’Extension) 2440 295
ARCH-SP14-EXT14(14’Extension) 4270 486
 MODEL & DESCRIPTION WeightPipe ClearanceMax depth in metres based on soil type examples
Size of Shoring Panels Range of Arch Kg. mm. B Soil C-60 Soil C-80 Soil

XLD-812/ XLD-612
3600mm long

Min. internal—1830
Max. internal—6100

1060 2300 12.4 9.4 7.4

HT6-814/HT6-614
4300mm long

Min. internal—1830
Max. internal—6100

1060 2300 10.5 8.1 6.4

HT6-820/HT6-620
6100mm long

Min. internal—1830
Max. internal—6100

1060 2300 7.7 6.1 4.7

HT6-824/HT6-624
7300mm long

Min. internal—1830
Max. internal—6100

1060 2300 6.6 5.2 4.2
SOIL TYPE EXAMPLES
GOOD SOIL (type B) AVERAGE SOIL (type—C-60) POOR SOIL (type—C-80)
Medium cohesive to granular soil. 2.155 kPa per metre of depth. Soft cohesive to submerged soil. 2.873 kPa per  metre of depth. Soft cohesive to submerged soil. 3.830 kPa per metre of depth.
DESCRIPTION
*Clay, with  unconfined compressive strength greater than 48kn/m2 but less than 144kn/m2.
* Cohesionless gravel, silt, silt loam or sandy loam.
*Soft cohesive soil unconfined compressive strength less than 48kn/m2.
* Gravel, sand and loamy sand; Submerged soil or fractured rock that is not stable.
* Soft cohesive soil unconfined compressive strength less than 48kn/m2.
* Gravel, sand and loamy sand; Submerged soil or fractured rock that is not stable.

*Depth & kPa ratings are for lateral earth pressures only and do not take any surcharges into account.
*Soil & site conditions should be assessed by a certified person prior to installation.

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