What is the common thickness of the steel deck

At present, steel decks have been widely used in buildings and industrial buildings such as floors, roofs and bridge decks. When choosing a steel deck, many people are still confused about the thickness of the steel deck commonly used. If you choose a steel deck that is too thick, the amount of steel used will increase, and the price will increase; Today, Solideck will take you to learn more about the common thickness of steel decks.

Commonly used specifications for steel plate thickness

The steel deck is made of cold-rolled steel plates. The common specifications for the thickness of the steel plates are: 0.75mm, 0.90mm, 1.0mm, 1.20mm, and 1.50mm. The welded-through pressed steel plate is reliably connected to the steel beam, so the maximum thickness of the steel deck should not be greater than 1.5mm. When used as a composite floor slab, the “Code” stipulates that the thickness of the steel plate should be ≥ 0.75mm.

What is the commonly used thickness of the steel deck

In projects, steel deck thicknesses of 0.75, 1.0, and 1.2 are generally used. For example, some projects we have done:

The Macau Passenger Inspection Building of the Hong Kong-Zhuhai-Macao Bridge adopts SD65-555, 1.0mm thick steel deck;

The US M&G project uses SD76-915, 1.2mm thick steel deck;

Japan’s Mitsubishi Heavy Industries modular chemical plant adopts SD76-915, 1.0mm thick steel deck;

Maldives terminal adopts SD75-600&SD65-510, 1.2mm thick steel deck;

Dhaka University in Bangladesh adopts SD53-600, 1.0mm thick steel deck;

Dhaka Airport in Bangladesh adopts SD65-510&SD51-750, 1.0mm thick steel deck；

How to choose the thickness of the steel deck

The thickness of the steel deck mainly depends on the thickness of the floor slab and the spacing of the secondary beams. This calculation has technical content. It is calculated based on the section modulus and section moment of inertia of the steel deck. Here, let me briefly talk about the basis for our judgment under normal circumstances:

Under normal circumstances, the span between steel beams is within 2m, and the thickness of the steel deck is 0.75-0.8mm; for a span of 2-2.5m wide, the thickness of the steel deck is 0.8-1.0; the span is 2.5-3.0m , The thickness of the steel deck is 1.0-1.2mm, the thickness of the steel deck is 1.5mm for the span of 3-4 meters, and the span of more than 5m needs to be added with temporary support.

The above only considered the thickness of the steel deck from the perspective of plate thickness, without fully considering factors such as plate shape and strength.