What is a method to double check your formwork dimensions?

• A. Check your diagonals
• B. Use a steel template
• C. Measure the height
• D. Confirm plan dimensions

Answer: (A)

Checking diagonals is a quick way to verify the formwork is square and the dimensions are true. For a rectangular form, the two diagonals should be equal in length and cross at the same midpoint, which indicates right angles at the corners and that the width and height match the intended plan. If the diagonals don’t match, something is out of square or the frame is twisted, and you’ll know to adjust before pouring. While other methods like using a template or measuring just the height can confirm individual aspects, they don’t guarantee overall squareness. Similarly, confirming plan dimensions verifies the overall size but won’t reveal misalignment in the corners. So, checking diagonals provides a reliable, in-the-field check that your formwork dimensions line up with the design and are truly square.