Decking for mezzanine floors

Roof decks are not just for roof constructions, they are also particularly suitable to form lightweight mezzanine floors. The build construction, in its simplest form, merely requires a plywood facing board to provide a flat access / storage area. As with any floor design, deflection of the deck is limited to span/350.

All our extensive roof deck range may be utilised as a mezzanine floor, ranging from 32 mm deep up to 159 mm deep deck.  The quick guide load tables below, for single or double span condition, are based on a galvanized deck substrate at 280 N/mm². There are exceptions – D51 deck is in 350 N/mm² and D159 deck is in 320 N/mm².  Decks can be supplied in 0.70mm, 0.90mm, 1.20mm or 1.25 mm gauge. In general term it is more cost effective to design the deck in the thinnest gauge, even if this requires an increase in deck depth.

Galvanised substrate is suitable for internal building applications, however a colorcoat underface coating can be supplied to enhance aesthetics. For further information contact our technical department.  mailto:technical@tatasteel.com

Mezzanine floors are generally open areas within a building where the acoustic reduction across the floor construction is of little importance. As a single skin, acoustic reduction will range from 25 Db for 0.7 mm gauge, to 30 Db for 1.25 mm gauge. Filling the profile troughs with dense insulation, and installing a dense acoustic layer directly above the deck can enhance reduction values.

 

QUICK GUIDE TABLE (SINGLE SPAN)

Single Span (M)	1.5 KN/M2 Applied Load	2 KN/M2 Applied Load	3 KN/M2 Applied Load	4 KN/M2 Applied Load	5 KN/M2 Applied Load
1.2	D32 – 0.7mm	D32 – 0.7mm	D35 – 0.7mm	D46 – 0.7mm	D46 – 0.7mm
1.5	D32 – 0.9mm	D35 – 0.9mm	D46 – 0.7 mm	D46 – 0.9mm	D46 – 0.9mm
1.8	D46 – 0.7mm	D46 – 0.7mm	D46 – 0.9mm	D60 – 0.7mm	D60 – 0.9mm
2	D46 – 0.7mm	D46 – 0.9mm	D60 – 0.7mm	D60 – 0.9mm	D100 – 0.7mm
3	D100 – 0.7mm	D100 – 0.7mm	D100 – 0.9mm	D100 – 1.2mm	D100 – 1.2mm
4	D100 – 0.9mm	D100 – 1.2mm	D159 – 1.25mm	D159 – 1.25mm	D159 – 1.25mm
5	D159 – 1.25mm	D159 – 1.25mm
6

 

QUICK GUIDE TABLE (DOUBLE  SPAN)

Double Span (M)	1.5 KN/M2 Applied Load	2 KN/M2 Applied Load	3 KN/M2 Applied Load	4 KN/M2 Applied Load	5 KN/M2 Applied Load
1.2	D32 – 0.7mm	D32 – 0.7mm	D32 – 0.7mm	D35 – 0.7mm	D35 – 0.7mm
1.5	D32 – 0.7mm	D32 – 0.7mm	D35 – 0.7mm	D46 – 0.7mm	D60 – 0.7mm
1.8	D32 – 0.7mm	D35 – 0.7mm	D46 – 0.7mm	D60 – 0.7mm	D60 – 0.7mm
2	D35 – 0.7mm	D46 – 0.7mm	D46 – 0.7mm	D60 – 0.7mm	D100 – 0.7mm
3	D60 – 0.7mm	D60 – 0.7mm	D100 – 0.7mm	D100 – 0.9mm	D100 – 1.2mm
4	D100 – 0.9mm	D100 – 0.9mm	D100 – 1.2mm	D100 – 1.2mm	D159 – 1.25mm
5	D100 – 1.2mm	D100 – 1.2mm	D159 – 1.25mm	D159 – 1.25mm
6	D159 – 1.25mm	D159 – 1.25mm	D159 – 1.25mm