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This estimation is depending on the fact that common weight of formworks is 0.239-0.718 kPa.
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That is why an allowance is decided as superimposed load per square meter for form work components during design.Īn initial assumption is made between 0.239-0.718 kPa based on experience and checked after the member is sized. The weight of formworks is substantially less than fresh concrete dead load and construction live load. ACI 347-04: Guide to Formwork of Concrete specify that, to allow for workers and their placing tools such as screeds, vibrators, and hoses, at least 2.4Kpa live load should be used for the design of horizontal formworks and a minimum live load of 3.6 kPa should be employed in cases where motorized carts and buggies are utilized.įurthermore, ACI 347-04 determines combined live and dead load design of not less than 4.8 kPa or 6 kPa if motorized carts are employed.įinally, formwork selfweight is calculated using unit weight and dimensions of formwork various parts. It is recommended to compute weight of materials separately in the case of heavy reinforcement to specify accurate unit weight. Vertical loads are exerted on formworks and may consist of dead loads such as formwork dead load, steel reinforcement embedded in the forms, molded fresh concrete and live loads such as the weight of workers, equipments, and tools. Horizontal Loads on Concrete FormworksĬoncrete Formwork Loads and Pressure Calculationsįollowing are the various types of loads and pressures act on concrete formwork: Concrete Formwork Loads and Pressure Calculations.