Reinforced truss floor decks offer numerous application features, with their load-bearing characteristics being particularly crucial. However, many users are unaware of the relevant knowledge about these characteristics. Therefore, the following section provides a detailed introduction.

Floor deflection

Standard cast-in-place reinforced concrete slabs generally do not exhibit significant deflection during construction due to the presence of formwork below. Once the concrete reaches a determined strength and the formwork is removed, the slabs deflect under their own weight, causing tensile forces in the concrete at the bottom of the slabs, which may even result in cracks. The deflection of reinforced steel truss concrete slabs varies depending on the setup of temporary supports as follows:

(1) Temporary Support Setup: Essentially the same as for ordinary cast-in-place reinforced concrete floor slabs.

(2) Temporary supports are not required; before concrete sets, the weight of the formwork, concrete, and construction loads are all supported by the steel truss. Concrete cures under the deformation of the truss floor deck, and the weight of the floor does not generate tensile forces in the bottom concrete.

2. Floor load-bearing capacity

During the usage phase, the steel truss chords work together with the concrete, and this floor panel has the same load-bearing performance as the composite reinforced concrete floor panel. Although the tensile stress of the steel reinforcement is not significant, its bearing capacity is the same as that of a standard reinforced concrete floor panel.

The load-bearing characteristics of the truss floor slab primarily encompass the aforementioned aspects. Through the above introduction, we can clearly understand the usage properties of the floor slab, thereby reducing the occurrence of usage errors and damage.