Aluminum Beams (Stringers)

The purpose of stringers is to transfer the loads of the surface panels to the scaffold. Extruded aluminum joists can be also used as stringers unless the loading is too excessive; in fact, it is good practice to avoid using a mixture of different beam types. Alumi­num beams are commercially available for lengths ranging from 4 to 30 ft (1.22 to 9.14 m) in 2-ft (0.6 1-m) increments.