Formwork, reinforcement and pile work

Formwork work

– The weight of formwork is measured and classified separately according to design requirements, materials used to make formwork (steel, wood, filtered plywood …)

– The weight of formwork is measured according to the contact surface between formwork and concrete (including protruding parts according to technical standards or instructions) and must subtract expansion joints, voids in tanks. structure surface has an area of> lm2, the intersection between foundation and beam, column with wall, beam with beam, beam with column, beam and column with floor, wall clapboard head … is counted once.

– For large volume of sheet formwork (size 1.5mx2m), when constructing according to technical requirements, it is not required to subtract formwork area of ​​voids on the surface of concrete structure.

Note:

– Formwork production, erection and dismantlement (including wood formwork and metal formwork) is calculated for 1m2 of concrete surface area of ​​each type of structure where formwork needs to be used. Formwork for some silo-slide, lift cage, tunnel formwork, cantilever-cantilever formwork is rated for the first production, erection and subsequent travel.

– If on a concrete structure surface tank with a void area <1m2, formwork area will not be deducted and additional formwork is not included for wall tanks, edges around the void.

– For formwork of some types of structures (beam, beam, floor, roof …) when calculating for civil and industrial constructions, if the anti-formwork height exceeds the aperture (throughput), the basis is into the design requirements and specific construction conditions to calculate the amount of material (supports, bracing, nails) and labor accordingly.

Reinforcement work

– The weight of the reinforcement must be measured and classified according to the type of steel (normal and prestressed steel, plain steel, strip steel), steel grade, steel group, reinforcement diameter according to structural parts (foundation , columns, walls …) and construction conditions. Some special reinforcement work must also be measured, peeled and classified according to the height of the structure.

– The weight of reinforcement measured for peeling includes the weight of reinforcement, splice, threaded connections, pipe connections, spacer, gaskets, bolts, and the weight of construction method reinforcing steel (such as steel between 2 reinforcement …), if any.

– Information on standard strength, surface shape and other identifiable features should be specified in the calculation table, measuring and stripping the volume of works, work items.

Note:

The production and erection of rebar is rated for 1 ton of rebar, including steel loss during construction, not including steel overlap, reinforcement between layers of reinforcement, steel waiting and steel structures. Non-standard buried in concrete.

Pile work

– Pile weight must be measured, classified according to pile fabrication material (bamboo, wood, reinforced concrete, steel), pile size (length of each pile, diameter, cross section), method connection of piles, piling depth, rock grade, construction conditions (terrestrial, underwater, freshwater, brackish water, plum juice) and construction methods (manual, mechanical construction).

– The weight of the pile, after measuring the peel off, is also supplemented with the weight of cutting, breaking the head of the pile, loading and transporting the waste after cutting, demolishing, if any.

– Information related to the lowering of piles such as the necessary requirements when driving the piles should be specified in the calculation table, measuring the volume of works, work items.

For bored piles, Barrete pile structures or field prefabricated reinforced concrete piles, the measurement of the workload of concrete, the reinforcement of the pile is as instructed on the workload of concrete (section 3) and reinforcement (item 5) above.