General Arrangement

Studio grids shall be arranged as a square matrix similar to acoustical ceiling tile grids. The most common dimensions are 4' x 4' and 5' x 5'. Alternative dimensions may be used depending on the height of the grid and the size of the room. The grid shall be centered in the room, unless it would create a perimeter bay smaller than 2' wide. If a perimeter bay would be less than 2', one row of pipes will be deleted and the grid re-centered.

The grid for this project shall be a _______' x _________' matrix.

The studio has nominal rectangular dimensions of _______ ft x ________ ft.

Consult plans for possible cutouts or extensions to the base rectangle.

Materials

All materials shall be provided, including miscellaneous trapeze hangers to avoid obstacles such as ductwork. Coordinate penetrations through acoustical ceiling (if any).

Pipe

Pipe for grid is to be 1-1/2 inch Sch 40 Steel Pipe, with an O.D. of 1.9 inches, and a wall thickness of .145. Pipe shall be painted semi-gloss black. Pipe is to be in sections 20 feet in length with exception of end piece being shorter to accommodate size needed. Consecutive sections to be spliced together with sleeves of 24 inch long pieces of 1-9/16 inch mechanical tubing, held in place with 4 each 5/16 inch bolts, two in each end of pipe through the sleeve, at 90 degrees of each other. Welded and riveted splices are acceptable.

Overlap Brackets

Overlap or intersection brackets are to be of Cold Rolled Steel, plated black, stamped to fit 1-1/2 inch pipe, with two 3/8 inch U-Bolts with heavy hex nuts, for secure and easy connection of two overlapping pipes. Install u-bolts "up" with the nuts on top. Rotolocks are acceptable. Intersections using flat plates which do not cradle the pipe are not acceptable. Provide one overlap at each point where two pipes cross (100%).

Wall Stabilizers

Wall Mount Stabilizers internal sleeve is to be at least 8 inches of 1-9/16 inch mechanical tubing, welded to a 5 inch disc of 1/4 inch steel which mounts to wall anchored by 4 bolts. Provide at least on flange per 16' of wall length. Additional flanges may be used where suspension points can not be easily rigged.

Hangers

Hangers of all types must fall plumb. Hangers 10' or less in length shall be unspliced 3/8" threaded rod. Provide a 1-1/2" pipe hanger (clevis or J-style). Hangers shall be located at all perimeter pipes and at approximately an 8' x 8' matrix for the interior. Compensate for ducts and joist spacing to achieve one hanger per 64 sq feet of interior space. Provide all miscellaneous materials for attachment to overhead structure. Hangers longer than 10' may be:

Cable = 1/4" G.A.C. aircraft cable with a trim device attachment to a pipe clamp.

Chain = 3/16" GR 30 proof coil chain with a trim device attachment to a pipe

Heavy threaded Rod = Rod shall be B-7 3/8" threaded rod with extra long coupling nuts. Provide a 3/8' hex nut jammed against both sides of the coupling nut. clamp. Attach to pipe using 1-1/2" pipe hangers, (clevis or J-style).

Finish

The finished grid shall be level within ½" over the entire studio floor. The grid shall resist horizontal sway as demonstrated by one man pushing horizontally while on a ladder a scaffold. The grid shall be free of bow and deflection. The pipes shall be installed in neat, even rows and columns. Provide necessary anti-sway devices if necessary.