The difference between three types of floor slabs in precast buildings from a project perspective
PH free support plate (a new type of prestressed concrete composite plate with steel tube web truss) is composed of a prestressed bottom plate, a flat steel tube truss web member, and UHPC upper chord ribs.
The use of prestressed base plates combined with UHPC upper chord ribs can improve the rigidity during the construction phase while saving the amount of steel reinforcement on site.
The web members are made of flat steel pipe trusses, which are convenient for production and also conducive to on-site pipeline penetration.
Therefore, PH plates can be used as continuous large plates to achieve a span of more than 4.
2m without support (hollow plates can achieve a span of 9m without support).
For steel structure factories with a 9m * 9m column grid, only one steel secondary beam needs to be set at the mid span, which can achieve complete project site without support.
In addition, due to the fact that the PH board bottom plate is only 35mm or 40mm, a floor slab thickness of 110mm can be achieved, which can save 20mm of concrete usage compared to other composite boards.
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