Landscaping License Practice Test

When pouring a concrete slab, what is the minimum length for stakes used for formwork?

1. 6 inches

2. 12 inches

3. 18 inches

4. 30 inches

The correct answer is: 12 inches

The minimum length for stakes used for formwork when pouring a concrete slab is typically 12 inches. Stakes need to be long enough to provide adequate support for the formwork and resist the lateral pressure exerted by the wet concrete. At 12 inches, the stakes are sufficiently embedded in the ground to ensure stability, preventing any movement that could result in misalignment of the form during the pour. Additionally, this length allows for easy handling and installation while maintaining strong support throughout the curing process. Stakes that are shorter than this may not adequately anchor the formwork, increasing the risk of structural issues in the concrete slab, such as uneven surfaces or cracks. Longer stakes may be used in certain situations depending on the specific site conditions, but 12 inches is a widely accepted minimum standard for typical concrete slab work.