The jack hole must be drilled straight, plumb, and to the proper what?

The requirement for the jack hole to be drilled to the proper depth is crucial for ensuring the effective operation and stability of the jack. Drilling to the correct depth allows the jack to be fully embedded in the material it is meant to support or lift, which contributes to the jack's ability to distribute weight evenly. This prevents potential failure due to inadequate support.

Additionally, having the proper depth is essential for safety considerations. If the jack hole is too shallow, the jack may not function as designed and could lead to catastrophic failure during operation. Conversely, drilling too deep might compromise the structural integrity of the surrounding material or lead to unnecessary complications during installation.

Understanding the significance of depth ensures that operators can install jacks that will perform optimally and safely.