Beam clamps are available in two basic designs, the clip on type (FIG 1) and the more popular adjustable type (FIG 2).
The main consideration when selecting the clamp is the required SWL, i.e. the load to be lifted plus the weight of the hoisting unit.
NOTE: If the clamp is to be used to suspend a shave block, the additional loading caused by the downward pull on the effort rope must be taken into consideration when determining the SWL requirement.
The width and thickness of the beam flange must also be considered and may well lead to the selection of a clamp in excess of the desired SWL to be compatible with the beam dimensions. The range and adjustability are indicated on the clamp’s identification plate.
The majority of clamps are designed for ‘in-line’ use only, i.e. the line of force must be at right angles to the flange of the beam on which it is attached (see FIG 3). It is therefore important to ensure that for ‘angled’ applications, a clamp of suitable design is selected (see FIG 4).