472. No warranty that plans are practicable.

472.     No warranty that plans are practicable.

An architect or engineer does not warrant to the builder or contractor the practicability of the plans, drawings and specifications prepared by him, or of the temporary means of construction indicated in the specification. It is the duty of the contractor to investigate these matters for himself, and it has been held that any usage or custom1 for him to rely on the drawings or specifications will not assist him2. If he does not inquire into the matter he runs the risk of not being able to carry out