Technical information Crab range

The Crab system: C lavetage R apide A uto B asculant (quick self-locking keying) 4 01.11.17 The Crab system consists of a self-locking wedge key attached to a stirrup. Once a ledger comes into contact with a stirrup, the wedge key pivots automatically to form an instant connection. A single blow to the wedge key ensures the strength of the connection. When wedge-key is dropped along the main axes, it ensures a straight or right-angle join between ledgers. A ledger may also be installed in any direction, without any dead angle . Spacing between standards 1.00 m Standards Ø 49 mm Standards Ø 57 ou Ø 60 mm 66.75 66.75 133.50 66.75 66.75 133.50 Standard Ø 49 mm Standard Ø 60 mm Standard Ø 49 mm Standard Ø 60 mm Example with a 1-metre ledger The Crab system allows a ledger to have a single centre distance, irrespective of post diameter (49, 57 or 60 mm). This advantage enables the same ledgers, diagonals and decks to be used on all our systems equipped with CRAB stirrups. The Crab system is used on Multicrab scaffolding using Ø 49 mm tubes, on Crabétai shoring using Ø 57 mm tubes and on Crabtour and Touréchaf shoring using Ø 60 mm tubes. The use of common scaffolding and shoring components makes equipment management easy. The CRAB system is able to mix and match standards with different diameters according to the load-bearing requirements. For example, Ø57 mm Crabétai standards can be used for the bottom of very tall Ø49 mm Multicrab scaffolding. The length of the stirrup varies according to the diameter of the tube in order to maintain a constant spacing between standards of different diameters . The Crab node can be used to attach 8 components simultaneously: 4 ledgers and 4 diagonals. Use this QR code to view the one-line Crab system presentation video. T e c h n i c a l i n f o r m a t i o n