Single Acting Manhole Brace

About Single Acting Manhole Brace

The Single Acting Manhole Brace range consists of a series of non-modular, (single piece) hydraulically adjustable legs which are connected together to support square or rectangular excavation sizes ranging from 1.15m to 3.0m.

The range consists of 5 individual legs, each incorporating a single acting hydraulic ram unit that provides on-site length adjustment in each leg. Note: these legs are relatively light duty in terms of load capacity and the single acting hydraulics necessitate manual retraction after pressure release. 

Benefits

  • Relatively lightweight - can be used with small excavators.
  • Simple and quick to assemble on site.
  • Ideal for light to medium duty applications in 4-sided excavations.
  • Single acting hydraulics requires only a single hose connection. Hydraulic isolation valve is available on some models to prevent fluid loss on de-pressurisation.
  • Simple to install and remove

 

Specification

Leg ref.

External Working Range (m)

Leg Weight (kg)

Beam Width (mm)

Internal Range (m)

Min                    Max

540A*

1.5 - 2.4

35

120

1.26 2.16

400S

1.15 - 1.6

53

120

0.91 1.36

400M

1.74 - 2.75

93

120

1.5 2.51

A

1.7 - 2.4

70

140

1.46 2.16

B

2.2 - 3.0

95

140

1.96 2.76

*These ranges do not take into account the potential deflection of the waling beam, which will be dependent upon applied load and upon span. As such, the actual clear opening achieved is likely to be smaller than the internal range values quoted. These figures should be used as a rough guide only and should not be relied upon to provide an accurate assessment of clear opening

 

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