DETAILING OF MEZZANINE FLOORS

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When a projecting surface mounted square baseplate is unacceptable, we can make it rectangular, gusset it on both sides to ensure load is distributed without dishing and conceal it within a metal stud partition or inside blockwork.

Another method of concealing baseplates is to diamond cut and break out a recess in the concrete slab, place the plate within the recess and make  good with grout, subject to satisfactory structural design.

Sometimes if the decking overhang exceeds the permissible length, stub beams are necessary to support the overhanging board edge of mezzanine floors. Cantilevers in the main beam direction are more straightforward.

Chamfering the edges of a baseplate, particularly if it is large, prevents it becoming a potential trip hazard. Where steelwork will remain visible in a sensitive location, circular columns and base plates may be more aesthetically appealing. 

For a cleaner industrial look, exposed boltheads on visible parts of mezzanine floors or stairs can be made to look neater by recessing them. Stair stringers can also be made to fit tight to walls when countersunk fixings are used.

Circular columns can be more visually pleasing than square columns. In this instance the existing exposed circular building columns are complemented by the smaller, circular columns of the new mezzanine floors.