Red Seal Carpenter Practice Exam 2026 – All-in-One Resource to Master Your Certification!

Wood and metal shores posts should never be used together under the formwork for a suspended slab because wood and metal react differently to loading, creating an imbalance and potentially causing a failure. Option A is incorrect because while wood cannot be wedged as tightly as metal, the main concern is the reaction to loading rather than snugness. Option B is also incorrect because the need for lacing is not the main reason for avoiding the use of wood and metal together. Option D is incorrect because the potential for failure due to incompatible reactions to loading outweighs the reusability or cost benefits of using metal posts.