Mast construction for pedestal scaffold

A pedestal scaffold has a base member (11), a telescopic mast (16) mounted vertically on the base member and a work cage (17) mounted in cantilever manner from the upper end of the mast (16). The mast (16) has nested tubular mast sections (16a-e) of rectangular cross-section and formed of thin-walled sheet aluminium with rounded corners (43) and vertical stiffening ribs (46, 48) on each side thereof extending the height thereof. Plastic slide blocks (61, 66) at the inner corners of the upper end and at the outer corners of the lower end of the mast section distribute the forces between the sections (16a-e) to relatively large areas of the aluminium sheet which forms them.