(57) A modular block is the key component of scaffolding for use in restricted working
spaces such as are encountered in the building of coke ovens.
The scaffolding comprises a plurality of columns (8) spaced at regular intervals along
the length of the working space (9) and each built up from a set of modular blocks
(12 to 15). The modular blocks are preferably of a framed construction, injection
moulded from a high-density thermoplastic polymer, and structured to give high resistance
to crushing. The blocks (12 to 15) of each set are all of the same external transverse
horizontal dimensions and each is fashioned at its underside with a depending peripheral
flange (16) and at its upper side with an inset peripheral ledge (17). The modular
blocks (12 to 15) of each set differ in flange and ledge widths with the ledge width
of each greater than the flange width and the peripheral flange (16) of each upper
block (13, 14 and 15 respectively) in a column (8) snugly fitting on to the peripheral
ledge (17) of the block (12, 13 and 14 respectively) immediately therebelow in the
column.
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