A. Provide all supports, supplementary steel and channels required for the proper Seismic installation, mounting, and support of all work installed under this Section.
B. All supports, supplementary steel and channels shall be furnished, installed, and secured with all fittings, support rods, and appurtenances required for a complete support or mounting system. C. Supplementary steel and channels shall be firmly connected to the building construction in a
manner approved by the Architect prior to the installation of same. Submit to the Architect, via the General Contractor, the locations proposed for using supplementary steel and channels for the support of equipment, fixtures, and raceways. The submittal shall indicate the mounting methods, size, and details of the supports, channels and steel. Submittal shall also indicate the weight that the supports, channels, and supplementary steel are to carry.
D. The type and size of the supporting channels and supplementary steel shall be of sufficient strength and size for seismic restraint and shall allow only a minimum deflection in
conformance with the channel and supplementary steel manufacturer's requirements for loading. E. All supplementary steel and channels shall be installed in a neat and workmanlike manner,
parallel to the walls, floor, and ceiling construction. All turns shall be made with 90-degree and 45-degree fittings, as required to suit the construction and installation conditions.
F. All supplementary steel, channels, supports, and fittings, shall be Underwriters' Laboratories, Incorporated-approved, be galvanized steel, and be manufactured by Steel City, Unistrut, Power-Strut, T. J. Cope, Chalfant, or approved equal.
G. Provide supports to meet the required Seismic rating, as indicated under "Part One" of this Specification.
H. Provide beam clamps with set screws (C-clamp type).
J. Supporting from the roof decking will not be acceptable.
K. Provide expansion anchors on masonry units or brick work. Power-actuated supports will not be accepted.
L. Provide stainless steel or corrosion-resistant supports in corrosive areas , or in wet or damp areas.
M. Support work from the building structure, independent of suspended ceilings, roof deck, or other trades work. Where ductwork, pipes, pipe racks, type of building construction materials, or structural framing members provide obstruction or difficult support means, hanger rods shall be used in association with horizontal sections of steel support channels, in an approved manner.
N. All work shall be installed in a rigid and satisfactory manner, and shall be supported by bar hangers in frame construction, or shall be fastened directly with wood screws on wood, bolts with expansion shields on concrete, or brick toggle bolts on hollow masonry units, and machine screws or welded threaded studs on metal. Threaded studs of the proper type and holding capacity, driven in by a power charge, and provided with lock washers and nuts, are acceptable for mounting of equipment on solid concrete walls or slabs.
O. Obtain written permission from the General Contractor to allow use of power-activated charges. Use only properly trained and licensed operators.
P. Do not use power charge-driven supports for any work that is to be hung from a horizontal surface without written permission from the Architect.
Q. Preset inserts of the proper type and holding capacity shall be used in overhead slab construction wherever possible.
R. Provide lateral supports for work to prevent excessive movement during a seismic event, using rods, braces, or galvanized or stainless steel cables.
S. Pendants, supports, or hanging rods longer than 12 inches (300mm) shall be laterally braced. T. Where installed in damp, wet areas, and areas requiring wash-down, all surface-mounted panels,
boxes, junction boxes, conduits, etc., shall be supported by spacers to provide clearance between wall and equipment.
3.11 CABLE SUPPORTS
A. Provide strain-relief hardware for backbone cables at each floor level as they pass from one floor to the next.
B. Provide hook-and-loop (Velcro) cable wraps at all panels, equipment racks, and cabinets. Cable ties are specifically prohibited.
C. Cable ties for horizontal cables shall be secured with minimum required compression in order to secure the cables properly without impeding the signal-transmission rating (geometry) of the cable. Hook-and-loop (Velcro) cable wraps may be used in lieu of cable-ties for copper cables only. Cable-ties are specifically prohibited for fiber optic cables.
DOUGLAS MIDDLE SCHOOL
D. When pathways are not provided or specified, provide J-Hook supports from the building structure, as required for cable runs to the cable drop location. Maximum distance between supports shall be five feet, depending on the structural elements of the building. Maximum number of cables per support shall be thirty. Provide additional supports as required when cable quantities exceed thirty, and to maintain required bending-radius of cables. Cables installed exposed or in areas subject to abuse (below 10 feet (3m) above finished floor), or in accessible areas, shall be installed in conduit.
E. All cables shall be supported directly from building structure. Under no circumstance shall cable be installed using cross-bracing, plumbing/sprinkler pipes, ceiling systems, or any other system that is not a specifically approved method to independently support cables. Cables shall not be allowed to rest on ceiling tiles, duct work, piping, etc. Supports shall be provided as required in order for cables to avoid contact with any other building system. Bundle cables in groups by Room