Trusses are mainly used for the transport of long and bulky loads. They are an effective means of reducing the angle of inclination in the lifting gear. With their help, the room height can be used more effective.
In most cases, the traverse is picked up by the crane via a central lifting eye. The version with less tendency to commute has 2 outwardly offset crane eyes. The trus is then picked up by the crane using a 2-leg sling. However, this requires more overall height.
Another variant is the bolt holder, which can shorten the overall height. However, depending on the positioning, this can lead to a higher tendency to pendulum. Folding flaps for holding the double hook are another variant.
Yes. According to DGUV 100-500, an examination by an expert is required at least once a year.
Usually it is a visual and functional test.
Depending on the age and general condition, a red/white test of the weld seams may also be advisable.
Basically possible if the expert is available and the entrepreneur has made the appointment as expert.
The inspection must be recorded in writing. The test report must be presented to the authorities on request.