Final answer:
To check for a square foundation, Larry and Joe can measure diagonals to ensure they are equal, use a level to verify horizontal planes and right angles, and directly check for right angles at each corner with a carpenter's square.
Step-by-step explanation:
The question at hand involves the methods Larry and Joe could use to check the foundation for square. There are several ways to ensure that a foundation is square, which is crucial in construction to make sure that the building to be constructed upon this foundation will have properly aligned walls and be structurally sound.
- Measure diagonals: By measuring the diagonals, Larry and Joe can make sure that they are equal in length. If the diagonals of a rectangular or square foundation are equal, it is an indication that the corners are right angles, and therefore, the foundation is square.
- Use a level: They can also use a level to check that all the sides are perfectly horizontal and that the corners form 90-degree angles. A level helps in verifying that there are no inclines or declines on the foundation's surface which could lead to an unsquare foundation.
- Check for right angles: Another method is to directly check each corner of the foundation with a carpenter's square or a triangle to ensure they each have a right angle. If each corner is at 90 degrees, then the foundation is square.
While inspecting for cracks (option D) is an important part of foundation inspection, it does not directly relate to checking if the foundation is square. Therefore, the three methods listed that Larry and Joe are likely to use to check the foundation for square are A, B, and C.