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RE: Back propping of RC and post tensioned concrete floor DTGT2002 Structural 16 Jul 03 12:28 Your question is in regard to shoring and reshoring Reinforced Concrete Structure.
Best Answer: "Back propping" can refer to shoring up of forms to support overhead concrete. In this case, the forms are supported by temporary steel or timber beams and as many vertical posts as required. Once the concrete has achieved sufficient strength to support itself, the forms can be removed.
CASE STUDIES ON APPLYING BEST PRACTICE TO IN-SITU CONCRETE FRAMED BUILDINGS Early age construction loading having more than one level of back-propping. Further, the uppermost slab of All floors are suspended floors NO ONE LEVEL OF TWO LEVELS OF LOCATION LOAD BACK-
When a new concrete floor slab is poured is it acting as a uniformly distributed load or maybe as a series of point loads? Can the back-propping grid be assumed to act as a planar spring support or does it cause additional bending moments and shear forces in concrete slab similar to concentrated loads?
Suspended Concrete Flooring Speedfloor is a suspended concrete floor system using a cold formed steel joist as an integral part of the final concrete and steel composite floor. The joist is manufactured from pre-galvanised high strength steel in a one pass rollformer giving a high degree of accuracy at a fast production rate.
Suspended slab subfloor. Tags: Floors. Suspended slab sub-flooring can be used as a ground floor slab for greater stability on hilly ground. Suspended slabs are made of concrete and steel mesh, the same as a ground slab. They are normally pre-fabricated offsite, and transported by truck.
Back propping is used to support a suspended slab while the formwork is being stripped. The back propping then remains in place until the slab gains enough strength to support itself. It is a vitally important part of the safe and economic construction of in-situ concrete structures.
curing in high rise building. Login A double check on punching shear of props is worthwhile carrying out as is the need to check what the wet concrete load is from the floor being concreted on the floor being struck. time as long as the frame contractor has enough decking and back propping material available for the subsequent areas
What is Shoring? What is Reshoring? For concrete floors, the dead load is much greater than the live load. If we are depending on the live load capacity of a floor slab to support the weight of workers and fresh concrete from above, we will overload the slab. This forming sequence may be called pre-shoring or back-shoring. This is a
SUPPLIER OF SUSPENDED CONCRETE FLOORS Suitable for suspended garage floors and roofs . COMPREHENSIVE COST SAVINGS Savings of up to 30% are achievable when using Smartslab Little or no propping is required enabling other trades to continue working
Flow charts for striking and back-propping procedures are given in Ref. 1. Construction load considerations All floors are suspended floors 5. Figure 2 gives location of loads wp, wb1, and wb2 Measurement of early age concrete strength For early striking, the in-situ strength
The unique suspended concrete floor system Speedfloor is a suspended concrete floor system using a cold formed steel joist as an integral part of the final concrete and steel composite floor.
Future slab penetrations and demolition of post-tensioned floors Future slab penetrations and demolition of post-tensioned floors insitu reinforced concrete. For example, if a new stair well were to be located in the centre of achieved by using two open throat jacks back to back. After cutting the strand the force can
ZEGO ZlabFORM is our newly introduced integrated and insulated, reinforced concrete suspended flooring system Large Spans and cantilevers. Typical back propping 1500mm Maximum centres. Start laying from both sides and meet in the middle. Side of outer ZlabFORM Panel is cut plumb and sits 60mm on ZEGO Forms.
The Stahlton Engineered Concrete Rib and in-fill system is easy to transport and has been used extensively throughout For multiple storey buildings back propping should be in place for a Suspended Concrete Floor Slabs, published by CCANZ, is available on
column formwork and pouring concrete on site - work activities carried out in a factory environment are generally lower risk table or flying formsa large pre-assembled formwork and falsework unit often forming a complete bay of suspended floor slab, and modular formwork systems which are often lighter weight and eliminate the need for tasks
The unique suspended concrete floor system. Speedfloor is a suspended concrete floor system using a cold formed steel joist as an integral part of the final concrete and steel composite floor.The joist is manufactured in Australia from pre-galvanised high strength steel in a one pass roll-forming machine giving a high degree of accuracy at a fast production rate.
SAFE PROP is a unique and innovative product that makes back propping more efficient and most importantly safer. Making suspended slab construction safer As you know, constructing suspended slab floors creates a number of safety risks which need to be managed.