A frame jib consists of what components?

A frame jib typically consists of two side rails and cross members made of rectangular tubing. This design allows for a robust frame that can support loads effectively while providing stability. The rectangular tubing is often strong yet lightweight, making it ideal for constructing jibs that need to extend out and lift or move materials efficiently.

The two side rails provide the primary structural support, while the cross members add rigidity and prevent twisting or bending under load. This configuration is essential in various applications, such as construction and manufacturing, where precision and strength are required.

The other options do not describe the standard configuration of a frame jib. For instance, mentioning a single vertical column and a horizontal plate suggests a different kind of structure that might not provide the necessary support for horizontal loads. Additionally, the presence of four diagonal supports with a central pole could imply a different type of bracing system that doesn't align with the typical frame jib configuration.