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Hi-Clear Box System

A reliable trench support for when you need large clearances below the lowest spindles

  • Ideal for larger pipes/culverts
  • Robust trench box
  • Trench widths of 0.85m – 4.48m
  • Temporary Works Design available
  • Nationwide delivery

Description

Our hi-clear box system is is ideal for the installation of larger pipes and culverts, providing large clearances below the lowest spindles. The robust design makes this box suitable for most environments.

With three adjustable spindles, the hi clear box can achieve widths of 0.85 – 4.48m using a combination of extension pieces. Temporary works design is also available for this trench box range.

Spindle Clearance

With a bottom spindle allowing a maximum clearance of 2290mm, there is not much this box can’t do:

  • 1690mm
  • 1990mm
  • 2290mm

Hire or buy a Hi-Clear Box System

For more information on our box systems range please contact your nearest depot or call us on 0117 982 8236 to get our latest rates.

Hi-Clear Box System Information Sheet

A forklift/machine must be provided to off load the kit from the delivery vehicle. Alternatively SEL can deliver the equipment

Permissible Earth Pressure

Bottom Strut
Setting
Pipe Clearance
Beneath Struts hC
(m)
Trench Width [b] v Permissible
Earth Pressure [kN/m²]
< 2.0m < 2.5m < 3.0m < 3.5m < 4.0m < 4.5m
High 2.29 21.8 21.8 18.5 15.2 Contact SEL if a width
> 3.5m requires the
high strut setting
Medium 1.99 39.5 35.0 29.5 25.0 20.5 16.5
Low 1.69 45.6 45.6 41.0 35.0 28.5 22.5

Max weight per complete box

Box Length
L
Panel Height
H
Maximum Weight per complete box
m m kg
Mini-0.0 Midi-0.0 Maxi-0.0 Maxi-0.5 Maxi-1.0 Maxi-1.5 Maxi-2.0 Maxi-2.5 Maxi-3.0
4.0 3.15 Base 3455 3483 3516 3595 3674 3753 3833 3912 3991
1.4o Top 1425 1438 1455 1495 1535 1574 1614 1653 1693
NB: The 1.4m Top panel is from our Standard Trench Box Range

Spindle Chart

Box
Spindle
Type
Trench Box / Hi-Clear Box
Internal Width External Width
bC b

m

m
Mini-0.0 0.65 – 0.75 0.85 – 0.95
Mini-0.5 1.15 – 1.25 1.35 – 1.45
Mini-1.0 1.65 – 1.75 1.85 – 1.95
Mini-1.5 2.15 – 2.25 2.35 – 2.45
Mini-2.0 2.65 – 2.75 2.85 – 2.95
Mini-2.5 3.15 – 3.25 3.35 – 3.45
Mini-3.0 3.65 – 3.75 3.85 – 3.95
Midi-0.0 0.83 – 1.02 1.03 – 1.22
Midi-0.5 1.33 – 1.52 1.53 – 1.72
Midi-1.0 1.83 – 2.02 2.03 – 2.22
Midi-1.5 2.33 – 2.52 2.53 – 2.72
Midi-2.0 2.83 – 3.02 3.03 – 3.22
Midi-2.5 3.33 – 3.52 3.53 – 3.72
Midi-3.0 3.83 – 4.02 4.03 – 4.22
Maxi-0.0 0.98 – 1.26 1.20 – 1.48
Maxi-0.5 1.48 – 1.76 1.70 – 1.98
Maxi-1.0 1.98 – 2.26 2.20 – 2.48
Maxi-1.5 2.48 – 2.76 2.70 – 2.98
Maxi-2.0 2.98 – 3.26 3.20 – 3.48
Maxi-2.5 3.48 – 3.76 3.70 – 3.98
Maxi-3.0 3.98 – 4.26 4.20 – 4.48
For 4.50m long Trench boxes, add 40mm to the ‘External Width’ column.

Questions? Talk to SEL about Hi-Clear Box System

Our team is responsive, experienced and happy to help.

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