The present technique relates to a welding torch handle that has an unenclosed slot extending from one end thereof. The TFT array panel includes a substrate, a plurality of gate lines formed on the substrate, a plurality of data lines formed on the substrate and intersecting the gate lines, and a plurality of thin film transistors. A base schema is defined that defines existing network services, and extension schemes may also be defined which are specific to new network services. The controller converts the hash value into a hash address which is communicated to the hash pointer unit, which receives the hash address and provides a hash pointer that is communicated to and used by the memory to look up respective search results. Joist assemblies can be positioned within the box-frame.