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truts

proprietary bracing struts

HDMBS (10kN accidental load)

MBS (with screws extended less than 300mm + 10kN accidental load)

MBS (with screws extended less than 450mm + 10kN accidental load)

MBS (no restriction on screw extension + 10kN accidental load)

JC40 (5kN accidental load)

LMBS (10kN accidental load)200

100210 3 4 5 6 7 8 9 10 11 12 13

300

400

500

600

700

safe

wor

king

load

(kN

)

length (m)

combination with double-acting hydraulic bracing frames for the strutting of excavations. The most commonly used struts are:

• JC40 bracing strut - originally developed for use in trench boxes

• light duty mechanical bracing strut (LMBS)

• standard mechanical bracing strut (MBS)

• standard mechanical bracing strut with higher strength screw units - normally referred to as heavy duty mechanical bracing strut (HDMBS)

• super bracing strut (SBS)

All the struts are modular with mechanical screw adjustment so they are not at risk of hydraulic failure.

The prop bodies for light duty mechanical, standard mechanical and super bracing struts consist of square sections as opposed to circular sections for safer handling and storage on site and during transportation - the square section bodies minimise the risk of rolling.

Forchart below:

Similar information in tabular form appears on pages 7.03, 7.05, 7.06 and 7.07.For information on the super bracing strut see pages 7.08 onwards.

Proprietary Bracing Struts - Allowable Loads(except Super Bracing Struts - see page 7.10)

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jc40 mechanical bracing strut

Performance Criteria1.

a) rel b) testing

2. performance data below assumes that the make-up of the strut is in accordance with the user information

in particular:

a)

b) strut is connected with the correct connector plate and clamp arrangement such that the centreline of the strut is

c)

3)

4)

5)

JC40 Mechanical Bracing Strut - Allowable Axial Compression Loadswith an Allowance of 5kN or Zero kN included for Accidental Loading

StrutCode No.

(203 x 203 U.C.)

StrutCode No.

(254 x 254 U.C.)(kg)

Length(mm) (kN)

min max 5kN

Load

No

LoadSJC-00 73 490 710 300 300SJC-01 84 710 1150 300 300SJC-02 109 1110 1550 300 300SJC-03 124 1510 1850 300 300SJC-04 145 1910 2350 300 300SJC-05 160 2310 2750 300 300SJC-06 180 2710 3150 300 300SJC-07 195 3110 3550 300 300SJC-08 216 3510 3950 250 300

Strut Length(between walings)

maximum screwextension 220mm each end

shaftbrace: 203 x 203 U.C.multibrace: 254 x 254 U.C.

connector plate(JCBP-035)

4 No. M16 x 60 long Gr10.9countersunk socket head setscrews and nuts per connection

4 No. M16 x 70 long Gr8.8bolts per connection

170 diameter S.G.iron extension

clamp platestop and bottom(JCBP-044 or JCBP-046)

2 No. M16 x 80 long Gr8.8bolts per connection

strut squareto rail