Abstract: A preferred fire-rated dome housing assembly (10) is mountable in a space (12) formed between a ceiling (14) and a false ceiling (16) and having a height (20) as little as 8.9 cm. The housing assembly includes a housing (22) that is mountable through a hole (24) in the false ceiling, and is protected from heat by a thermal insulation blanket (32). Support straps (34) are attached to a ceiling ring (36) that surrounds the hole for securing the housing assembly to false ceiling supporting members (18). A spacing collar (50) is fastened to the ceiling ring by threaded spacers (52) that extend below the false ceiling. The housing protrudes below the false ceiling and includes a mounting flange (48) that is fastened to the spacing collar. A dome (62) is secured to the mounting flange. The housing assembly preferably encloses a video camera (102).

Abstract: A preferred fire-rated dome housing assembly (10) is mountable in a space (12) formed between a ceiling (14) and a false ceiling (16) and having a height (20) as little as 8.9 cm. The housing assembly includes a housing (22) that is mountable through a hole (24) in the false ceiling, and is protected from heat by a thermal insulation blanket (32). Support straps (34) are attached to a ceiling ring (36) that surrounds the hole for securing the housing assembly to false ceiling supporting members (18). A spacing collar (50) is fastened to the ceiling ring by threaded spacers (52) that extend below the false ceiling. The housing protrudes below the false ceiling and includes a mounting flange (48) that is fastened to the spacing collar. A dome (62) is secured to the mounting flange. The housing assembly preferably encloses a video camera (102).

Abstract: A machine and process for assembling flanges to a web to produce an I-beam. The machine has conveyors for conveying each flange and a separate conveyor system for conveying the web. The web is rigidly held to prevent lateral movement as the flanges and web are assembled. The conveyance mechanism for the webs is adjustable upwardly and downwardly to accommodate changes in the flange dimension and web thickness. The conveyance mechanism for the web is mounted on inclined ramps. Movement of the conveyance mechanism in one direction elevates the conveyance mechanism and movement in the other direction lowers the conveyance mechanism. The flanges as conveyed are sensed and relatively adjusted to assure alignment of the leading ends.