What type of form will sustain lateral concrete pressure?

The correct answer is that a vertical form will sustain lateral concrete pressure effectively. When concrete is poured into forms, it exerts pressure as it sets. This pressure is primarily lateral, meaning it pushes against the sides of the formwork. Vertical forms are specifically designed to handle this kind of pressure because they align with the natural flow and weight of the concrete as it settles.

Vertical forms are typically constructed to be sturdy and rigid, capable of withstanding the weight and pressure exerted by the concrete during both the pouring and curing processes. This ability to resist lateral forces is crucial to ensure that the forms do not fail or collapse, which could compromise the integrity of the concrete structure.

In contrast, horizontal forms would not be suitable for sustaining lateral pressure as they are oriented to support loads from above rather than resisting sideways forces. Temporary forms are designed to be used for a short period and may not have the necessary strength to withstand lateral pressures in all scenarios. Flexible forms, while adaptable for certain applications, may not provide the rigid support needed to counteract the forces generated by the weight of the concrete. Therefore, vertical forms are the most appropriate choice for sustaining lateral concrete pressure effectively.