Construction Technology - SCAFFOLDING (part 2)

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SCAFFOLD FITTINGS

Fittings of either steel or aluminium alloy are covered by the same British Standard as quoted above for the tubes. They can usually be used in conjunction with either tubular metal unless specified differently by the manufacturer. The major fittings used in metal scaffolding are:

• Double coupler The only real loadbearing fitting used in scaffolding; used to join ledgers to standards.
  
• Swivel coupler Composed of two single couplers riveted together so that it is possible to rotate them and use them for connecting two scaffold tubes at any angle.
  
• Putlog coupler Used solely for fixing putlogs or transoms to the horizontal ledgers.
  
• Base plate A square plate with a central locating spigot, used to distribute the load from the foot of a standard on to a sole plate or firm ground. Base plates can also be obtained with a threaded spigot and nut for use on sloping sites to make up variations in levels.
  
• Split joint pin A connection fitting used to joint scaffold tubes end to end. A centre bolt expands the two segments, which grip on the bore of the tubes. Reveal pin Fits into the end of a tube to form an adjustable strut.
  
• Putlog end A flat plate that fits on the end of a scaffold tube to convert it into a putlog.
  

Typical examples of the above fittings are shown in Fig. 1.5.3.

MOBILE ACCESS TOWER

Mobile access towers are temporary structures used for gaining access to buildings for maintenance and repair. They are preferred to conventional scaffolding for work

to be continued...

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