There are several requirements that the formwork system needs to meet, otherwise, it would not serve its purpose adequately. In order to make sure that the formwork system fulfills its design goals, the designer and site engineer should take technical, functional requirements of the formwork into consideration.

Technical Requirements of Formwork System

#1 The formwork must not damage the concrete edge or surface; or themselves during removal from the structure.

#2 It should be carefully selected for the required finish surface and linings to produce the desired concrete surface.

#3 The formwork must not damage the concrete edge or surface; or themselves during removal from the structure.

#4 Formwork should be of the desired shape, size and fit at the location of the member in the structure according to the drawings.

#5 Panels of the formwork should be tightly connected to minimize the gap at the formwork connection to prevent leakage of cement paste.

#6 Formwork needs to withstand the pressure of fresh concrete and working loads and should not distort or deflect from their position during the concrete placement operation.

Functional Requirements of Formwork System

#1 It should be dismantled and moved as easily as possible.

#2 Formwork should be as lightweight as possible without any strength reduction.

#3 Simplicity in erection is another valuable functional requirement of formwork.

#4 Formwork shall be designed such that it fits and fastens together with reasonable ease.

#5 Formwork sections should be sized in a manner that can be lifted and transported easily from one job site to another.

#6 Interchangeability of formwork units is another functional requirement. This enables units to be used for forming different members.