However the vulnerability of aluminium in buckling due to low elastic modulus compared to steel and increased web slenderness of lcbs have raised the issues.
Roll formed steel beams.
Roll formed beam pin connectors and safety locking mechanism provides an automatic engagement when the beam drops firmly into place on the roll formed upright column.
Steel king roll formed teardrop step beams.
While it is flat the steel is processed through a punch that punches the holes which will later be used to attach the beams.
Roll form rack starts as a coil of steel.
Hence these sections are recently used as beams and joists in buildings.
The popularity of roll formed aluminium lcb has increased due to the efficiency and design of these sections.
Roll formed beams can be installed slightly faster than structural beams plus there is nothing to forget or misplace as no bolts or loose parts are required.
Boltless assembly auto engaging safety clips resist beam disengagement and provide an audible click when secured.
Boxspan is a roll formed beam manufactured from two c shaped sections of high tensile zinc coated steel mechanically locked together with a patented process.
Teardrop step beams have teardrop and rivet design with heavy duty connection plates that allow easy installation and greater connection integrity.
Preferably the cold rolled steel beam is cold formed from a unitary piece of sheet steel.
The result a 40 60 lighter beam with the strength of steel and the versatility of timber.