Adjustable screed rail

Road structure – process – or apparatus – Apparatus – Screed or drag

Patent

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Details

52365, E01C 1912

Patent

active

051545365

ABSTRACT:
Disclosed is an adjustable screed rail or guide comprising a top T-shaped element and an inverted lower T-shaped element which cooperate to form an adjustable elongated I-beam. The top T-shaped element and the lower T-shaped element are respectively formed of a flange element and at least one web element centrally located and perpendicular to the respective flange element. The lower T-shaped element has a second web element spaced from said at least one web element, the web element of the top T-shaped element being slidably located between the two lower web elements to adjust the height of the screed surface. The screed rail is locked in the adjusted position by bolts and wing nuts. The upper and lower flanges are provided with depending lips which serve the purpose of retaining poured cement or mortar against the screed rail, the screed rail providing reinforcement for the cement or mortar bed. The depending webs also have openings through which cement, mortar and/or reinforcing rods may be passed. The top T-shaped element is provided with a second depending web element parallel to the one centrally located web element, the bottom edge of the second web element being engageable with the top edge of one of the two lower web elements to provide a minimum-thickness gauge whereby a poured concrete or mortar bed will meet minimum code requirements for thickness.

REFERENCES:
patent: 1977076 (1934-10-01), Mann
patent: 2025576 (1935-12-01), De Spirt
patent: 2197278 (1940-04-01), Sverdahl
patent: 3333380 (1967-08-01), Wolf
patent: 4371330 (1983-02-01), Heffernan
patent: 4752156 (1988-06-01), Owens
patent: 4909002 (1990-03-01), Clifton et al.
patent: 4945698 (1990-08-01), Jertberg et al.
"Handbook for Ceramic Tile Installation", 1990, Tile Council of America, Methods F101-90, F102-90, F103-90, F111-90, F112-90, F113-90.

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