Abstract: An interlocking block has a specially configured interlocking block element having accurately positioned surfaces which are inclined to provide a guiding and seating action and an accurate position stop for an adjacent block that is interengaged with the interlocking block element.

Abstract: A storefront system for commercial buildings includes a series of spaced mullions with horizontal supports connected at their ends to the mullions to form a rear support for glass panels. A series of support clips are located at the intersections of the mullions and horizontal supports, with the support clips being fastened to the mullions and with the horizontal supports being mounted to the support clips. Similar support clips are attached to the horizontal supports intermediate the mullions and function to support the glass panels. A plurality of attachment clips also extend from the mullions and horizontal supports, between the glass panels, and cover plates are mounted on the attachment clips. The attachment clips are fabricated from a material having a low coefficient of heat transfer, so that heat from one side of the storefront is not readily transferred to the other side of the storefront.

Abstract: An apparatus and method for covering the ridge or peak of a metalroof system is disclosed. After the metal roofing panels are set in place on the sloping surfaces of the roof and seamed together, mating halves of a ridge panel are positioned along the ridge and parallel thereto. The mating halves have cut-outs corresponding to the rib seams of the roofing panels, the cut-outs each being covered by a seam cap. After the ridge panel halves are secured to the roofing panels, the interlocking joint between them is folded over and permanently seamed together. Finally, the areas at the ends of the ridge adjacent the rakes of the building are covered by filler panels. The filler panels have cut-outs corresponding to the rib seam of the ridge panel, and the cut-outs are similarly covered by seam caps.

Abstract: The panel fastener includes an externally driven crank having a first pin slidably engaging a first cam surface formed on a hook member. A second pin fixed on said hook member slidably engages a second cam surface having a fixed position. Rotation of said crank on center axis induces cam action causing said hook member to first rotate and then retract. Thereby, the hook member when located on one panel can engage a pin fixed on an independent second panel and join and draw together said panels. Alignment of the pins and crank axis prevents loosening or disengagement of the joined panels without intentional reverse operation of the crank.

Abstract: A prefabricated aeration block for silo bases in which at least two aeration blocks are mounted on the top side of a flat plate and shaped, hollow support sections are fixed on the bottom side of the plate, defining air channels for distribution of air to the aeration blocks.

Abstract: A rotatable gutter system including a longitudinally elongated gutter, a plurality of supports and a pulley and cable drive mechanism is disclosed. The support may be attached to the facia board of a building, or the underside of an eave. Each support includes a support bracket for attachment to the building and a gutter support member having roller bearings. The support member is attached to the gutter. The gutter can be rotated into a substantially inverted position for emptying debris therefrom by a cable actuated pulley affixed to one end of the gutter. A specially designed downspout having a gutter receiving aperture permits unhampered rotation of the gutter.

Abstract: A clamping device (FIG. 1) is provided for joining together boards (1,2) lying edge to edge in the same plane, and comprises a fixing rail (20) with upwardly directed flanges (21,22) at a mutual angle of about 90.degree., a pair of trough-like members (12,13) each bearing against the inside of one of said flanges (21,22), the side surface of one side (14) of said members (12,13) each bearing against the under side of a board (1,2) with its other side edge (15) engaging in a groove (16,17) in each board (1,2), there being a tensioning rail (9) with outwardly directed flanges engaging in slots (7,8) in the edge surfaces (3,4) of the boards (1,2), and clamping bolts (23) between the fixing rail (20) and tensioning rail (9) for urging the fixing rail towards the members (7,8) serving to support the boards (1,2) and press their edges (3,4) towards each other.

Abstract: An improved manhole structure is disclosed which comprises a cover having a rim inclined inwardly at 45.degree., on which a plurality of protrusions are provided; a ring for elevating the cover, having an upright inner wall and outer wall and an upper face and lower face, both inclined inwardly at 45.degree., on the said upper face a plurality of holes are formed for engagement with the protrusions formed on the cover, and on the said lower face a plurality of protrusions are formed; and a base having an upper surface inclined inwardly at 45.degree., and a flat lower face, on the said upper surface a plurality of holes are formed for engagement with the protrusions formed on the lower face of the said ring.

Abstract: A conjoint facia, hood and water dam is provided having dam and first engagable means affording dam means with ridge structure, and first engagable means. Sheet roofing leading onto the dam means is clamped to the ridge structure by clamp means subsequently to be covered by a facia and hood member, the latter having hood structure and facia means with second engagable means extending from the facia means. The first and second engagable means together form restraining means to be engaged for maintaining the facia means horizontally laterally restrained and the first engagable means includes detaining means for detaining the facia and hood member against upward movement relatively to the dam and first engagable means with the restraining means being engaged.

Abstract: A conjoint facia, hood and water dam is provided having dam and first engagable means affording dam means and first engagable means. Ridge structure of the dam means, against which ridge structure sheet roofing rests, is covered by hood structure of at least one facia and hood member, with there being second engagable means of the conjoint facia, hood and water dam available as an extension of the facia and hood member. The first and second engagable means together form tongue means and grooved means for these means to be engaged and the first engagable means includes detaining means for upward movement of the facia and hood member relatively to the dam and first engagable means to be stopped.