BS 4074:2000

Committees responsible
Foreword
1 Scope
2 Normative references
3 Definitions
4 Designation
5 Materials
6 Construction
7 Strength
8 Marking
Annex A (informative) Examples of calculations on trench
                      strut pin connections
Annex B (informative) Typical materials
Annex C (normative) Test for unintentional disengagement
Bibliography
Figure 1 - Steel trench strut
Figure 2 - Thread and collar nut clearances
Figure 3 - Calculated thickness, t, of threaded tube
Figure 4 - Dimensions of collar nut
Table 1 - Principle dimensions of trench struts
Table 2 - Minimum yield strength
Table B.1 - Typical materials

Gives the requirements for adjustable compression tubular steel trench struts, which relate to the design, materials, dimensions, strength, and resistance to inintentional disengagement. The dimensions specified include the lengths fully open and fully closed. It does not give information on the use on trench struts.

This British Standard specifies requirements for adjustable compression tubular steel trench struts. The requirements relate to materials, design, dimensions, strength and resistance to unintentional disengagement. The dimensions specified include the lengths fully open and fully closed.

The standard does not give information on the use of trench struts.

NOTE 1 The requirements of this standard are intended to ensure that the struts will have a characteristic resistance of 50 kN at all extensions. The standard does not specify a requirement for this characteristic resistance or a means of verifying it. Annex A gives examples of calculations on trench strut pin connections.

NOTE 2Various protective finishes are specified in BS EN 1065:1999.