Abstract: A building structural element having a plurality of air pockets defined therein. The air pockets are each essentially completely closed on all sides to completely trap air therein, and are all essentially completely isolated from each other to prevent air movement through and/or between pockets. One form of the invention includes a multi-layer panel unit and another form of the invention includes a stud.

Abstract: A device for establishing and maintaining a predetermined gap spacing between a post which is supported in an upright orientation and a supporting base. The device is adjustable to permit lateral movement of the supported post while maintaining the gap spacing constant.

Abstract: An electric service panel for underground service installations, wherein the electrical cable for supplying electrical power to the service panel leads to the service panel from below ground, said service panel having an elongate opening in a bottom wall portion thereof and a cable attaching adapter at the opening. The adapter can be laterally adjusted relative to the bottom wall and secured in adjusted position to thereby permit the point of entry of the cable into the service panel to be adjusted to compensate for misalignments between the cable and the service panel.