Before selection of concrete forms, it is expected for the constructor or the structural engineer to Know all types of concrete forms and their application. It is also expected to know the design, size, mass, height, cost, shape and etc. needed for the project before selection. The following listed below are what to be consider before selection of concrete forms.
- Pour Size
- Pressure on the Form
- Required Weight on the form
- Required Strength
- Amount of concrete
In detail, there are few key elements that are considered while selecting concrete forms, which are explained below:
1. The concrete forms selected can be either owned or rented. The cost of owning and its long-term use must be analyzed before buying it. If it is better to rent the form, then form type which is easily available and economical is chosen.
2. The experience with a particular type of form affects the choice of form. No production loss is expected if a form system is chosen that is more familiar to the workers. Without proper training of a new form system, loss is expected.
3. In terms of aesthetics, steel forms provide a clean finish with fewer bug holes on the casted concrete surface compared with wooden forms.
4. In providing tolerances steel forms are a better choice compared with other types. Steel forms have intrinsic stiffness and do not absorb moisture.
5. For low height structures, wood forms are the best choice. For tall forms of 20ft height steel forms with extra bracing and supports are the best choice compared to wooden forms.
6. For casting concrete with straight, curve or several offsets, and abrupt turns, steel form are an efficient choice. Thin wooden forms can be used if cost is an issue.