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1HEAVY DUTY SUSPENDED CEILING TYPICAL DETAILS <br />1.GENERAL REQUIREMENTS: THE FOLLOWING REQUIREMENTS APPLY TO CEILING SYSTEMS WHOSE TOTAL WEIGHT, INCLUDING CEILING MOUNTED AIR TERMINALS, SERVICES AND LIGHT FIXTURES, DOES <br />NOT EXCEED FOUR (4) PSF. HEAVIER SYSTEMS, AND THOSE SUPPORTING LATERAL LOADS FROM PARTITIONS, WILL REQUIRE SPECIAL DESIGN DETAILS. <br />1.1 #12 GAGE WIRE SHALL BE 0.106 INCHES IN DIAMETER CONFORMING TO ASTM A641. #12 GAGE WIRE SHALL BE SOFT ANNEALED, GALVANIZED STEEL WIRE WITH A CLASS 1 COATING. <br />1.2 #12 GAGE HANGER WIRES MAY BE USED FOR UP TO AND INCLUDING 4 FT. BY 4 FT. GRID SPACING AND SHALL BE ATTACHED TO MAIN RUNNERS. <br />1.3 PROVIDE #12 GAGE HANGER WIRES AT THE ENDS OF ALL MAIN AND CROSS RUNNERS WITHIN EIGHT (8) INCHES OF THE SUPPORT OR WITHIN ONE-FOURTH (1/4) OF THE LENGTH OF THE END TEE, <br />WHICHEVER IS LEAST, FOR THE PERIMETER OF THE CEILING AREA. SEE DETAIL 8/A913. PERIMETER WIRES ARE NOT REQUIRED WHEN THE LENGTH OF THE END TEE IS EIGHT (8) INCHES OR LESS. <br />1.4 PROVIDE TRAPEZE OR OTHER SUPPLEMENTARY SUPPORT MEMBERS AT OBSTRUCTIONS TO TYPICAL HANGER SPACING. SEE DET 9/A914. PROVIDE ADDITIONAL HANGERS, STRUTS OR BRACES AS <br />REQUIRED AT ALL CEILING BREAKS, SOFFITS, OR DISCONTINUOUS AREAS. HANGER WIRES THAT ARE MORE THAN 1 (HORIZONTAL) IN 6 (VERTICAL) OUT OF PLUMB ARE TO HAVE COUNTER-SLOPING WIRES. <br />1.5 CEILING GRID MEMBERS SHALL BE ATTACHED TO TWO (2) ADJACENT WALLS PER ASCE 7-05, SECTION 13.5.6.2(B). CEILING GRID MEMBERS SHALL BE AT LEAST 3/4 INCH CLEAR OF OTHER WALLS. IF WALLS <br />RUN DIAGONALLY TO CEILING GRID SYSTEM RUNNERS, ONE END OF MAIN AND CROSS RUNNERS SHOULD BE FREE, AND A MINIMUM OF 3/4 INCH CLEAR OF WALL. <br />1.6 THE WIDTH OF THE PERIMETER SUPPORTING CLOSURE ANGLE SHALL BE NOT LESS THAN 2 INCHES. <br />1.7 AT THE PERIMETER OF THE CEILING AREA WHERE MAIN OR CROSS RUNNERS ARE NOT CONNECTED TO THE ADJACENT WALL, PROVIDE INTERCONNECTION BETWEEN THE RUNNERS AT THE FREE END TO <br />PREVENT LATERAL SPREADING. A METAL STRUT OR A #16 GAGE WIRE WITH A POSITIVE MECHANICAL CONNECTION TO THE RUNNER MAY BE USED. WHERE THE PERPENDICULAR DISTANCE FROM THE <br />WALL TO THE FIRST PARALLEL RUNNER IS 8 INCHES OR LESS, THIS INTERLOCK IS NOT REQUIRED. <br />1.8 EXPANSION JOINTS SHALL BE PROVIDED IN THE CEILING AT INTERSECTIONS OF CORRIDORS AND AT JUNCTIONS OF CORRIDORS WITH LOBBIES OR OTHER SIMILAR AREAS. <br />1.9 PROVIDE LATERAL-FORCE BRACING ASSEMBLIES CONSISTING OF A COMPRESSION STRUT AND FOUR (4) #12 GAGE SPLAYED BRACING WIRES ORIENTED 90 DEGREES FROM EACH OTHER (SEE DETAIL 5 / A913). <br />1.10 PROVIDE BRACING ASSEMBLIES AT LOCATIONS NOT MORE THAN ONE HALF (1/2) THE CALCULATED SPACING IN EACH DIRECTION FROM EACH PERIMETER WALL AND AT THE EDGES OF ANY CHANGE IN <br />ELEVATION OF THE CEILING. <br />1.11 THE SLOPE OF BRACING WIRES SHALL NOT EXCEED 45 DEGREES FROM THE PLANE OF THE CEILING AND WIRES SHALL BE TAUT. SPLICES IN WIRES ARE NOT PERMITTED WITHOUT SPECIAL DSA APPROVAL. <br />1.12 COMPRESSION STRUTS SHALL NOT BE MORE THAN 1 (HORIZONTAL) IN 6 (VERTICAL) OUT OF PLUMB. <br />1.13 SUSPENDED ACOUSTICAL CEILING SYSTEMS WITH A CEILING AREA OF 144 SQUARE FEET OR LESS, AND FIRE RATED SUSPENDED ACOUSTICAL CEILING SYSTEMS WITH A CEILING AREA OF 96 SQUARE <br />FEET OR LESS, SURROUNDED BY WALLS WHICH CONNECT DIRECTLY TO THE STRUCTURE ABOVE OR WALLS INDEPENDENTLY BRACED ABOVE CEILING TO STRUCTURE ABOVE, DO NOT REQUIRE BRACING <br />ASSEMBLIES WHEN ATTACHED TO TWO ADJACENT WALLS. <br />1.14 FOR CEILING AREAS EXCEEDING 2500 SQUARE FEET A SEISMIC SEPARATION JOINT SHALL BE PROVIDED TO DIVIDE THE CEILING INTO AREAS NOT EXCEEDING 2500 SQUARE FEET. ALTERNATIVELY, <br />STRUCTURAL ANALYSIS SHALL BE PERFORMED TO DEMONSTRATE COMPLIANCE WITH ASTM E580-08 SECTION 5.2.9. <br />1.15 PENETRATIONS THROUGH THE CEILING FOR SPRINKLER HEADS AND OTHER SIMILAR DEVICES THAT ARE NOT INTEGRALLY TIED TO THE CEILING SYSTEM IN THE LATERAL DIRECTION SHALL HAVE A TWO <br />(2) INCH OVERSIZED RING, SLEEVE OR ADAPTER THROUGH THE CEILING TILE TO ALLOW FREE MOVEMENT OF ONE (1) INCH IN ALL HORIZONTAL DIRECTIONS. ALTERNATIVELY, PER ASTM E580 SECTION <br />5.2.8.8, A FLEXIBLE SPRINKLER HOSE FITTING THAT CAN ACCOMMODATE 1 INCH OF CEILING MOVEMENT SHALL BE PERMITTED TO BE USED IN LIE OF THE OVERSIZED RING, SLEEVE OR ADAPTER. <br />1.16 FASTEN #12 HANGER WIRES WITH NOT LESS THAN THREE (3) TIGHT TURNS IN 3 INCHES. HANGER WIRE LOOPS SHALL BE TIGHTLY WRAPPED AND SHARPLY BENT TO PREVENT ANY VERTICAL MOVEMENT <br />OR ROTATION OF THE MEMBER WITHIN THE LOOPS (SEE ASTM E580, SECTION 5.2.7.2).FASTEN #10 OR #12 BRACING WIRES WITH FOUR (4) TIGHT TURNS. MAKE ALL TIGHT TURNS WITHIN A DISTANCE OF <br />1-1/2 INCHES. HANGER OR BRACING WIRE ANCHORS TO THE STRUCTURE SHOULD BE INSTALLED IN SUCH A MANNER THAT THE DIRECTION OF THE ANCHOR ALIGNS AS CLOSELY AS POSSIBLE WITH THE <br />DIRECTION OF THE WIRE. NOTE: WIRE TURNS MADE BY MACHINE WHERE BOTH STRANDS HAVE BEEN DEFORMED OR BENT IN WRAPPING CAN WAIVE THE 1-1/2 INCH REQUIREMENT, BUT THE NUMBER OF <br />TURNS SHOULD BE MAINTAINED, AND BE AS TIGHT AS POSSIBLE. <br />1.17 SEPARATE ALL CEILING HANGER AND BRACING WIRES AT LEAST SIX (6) INCHES FROM ALL UNBRACED DUCTS, PIPES, CONDUIT, ETC. <br />1.18 WHEN DRILLED-IN CONCRETE ANCHORS OR SHOT-IN ANCHORS ARE USED IN REINFORCED CONCRETE FOR HANGER WIRES, 1 OUT OF 10 WIRE/ANCHOR ASSEMBLIES MUST BE FIELD TESTED <br />FOR 200 LBS. IN TENSION. WHEN DRILLED-IN CONCRETE ANCHORS ARE USED FOR BRACING WIRES, 1 OUT OF 2 WIRE/ANCHOR ASSEMBLIES MUST BE FIELD TESTED FOR 440 LBS. IN TENSION IN <br />THE DIRECTION OF THE WIRE. SHOT-IN ANCHORS IN CONCRETE ARE NOT PERMITTED FOR BRACING WIRES. NOTE: DRILLED-IN OR SHOT-IN ANCHORS REQUIRE SPECIAL DSA APPROVAL PRIOR <br />TO USE IN PRESTRESSED CONCRETE. <br />1.19 ATTACH ALL LIGHT FIXTURES AND CEILING MOUNTED AIR TERMINALS, TO THE CEILING GRID RUNNERS TO RESIST A HORIZONTAL FORCE EQUAL TO THE WEIGHT OF THE FIXTURES. SCREWS OR <br />APPROVED FASTENERS ARE REQUIRED. <br />1.20 FLUSH OR RECESSED LIGHT FIXTURES, WEIGHING LESS THAN 56 LBS. AND MECHANICAL TERMINALS AND SERVICES, WEIGHING LESS THAN 20 LBS., MAY BE SUPPORTED DIRECTLY ON THE RUNNERS OF <br />A HEAVY DUTY GRID SYSTEM BUT, IN ADDITION, THEY MUST HAVE A MINIMUM OF TWO (2) #12 GAGE SLACK SAFETY WIRES ATTACHED TO THE FIXTURE AT DIAGONAL CORNERS AND ANCHORED TO THE <br />STRUCTURE ABOVE. ALL 4 FT. X 4 FT. LIGHT FIXTURES MUST HAVE SLACK SAFETY WIRES AT EACH CORNER. ALL FLUSH OR RECESSED LIGHT FIXTURES WEIGHING 56 LBS. OR MORE AND MECHANICAL <br />TERMINALS AND SERVICES, WEIGHING 20 LBS. OR MORE, MUST BE INDEPENDENTLY SUPPORTED BY NOT LESS THAN FOUR (4) TAUT #12 GAGE WIRES, EACH ATTACHED TO THE FIXTURE AND TO THE <br />STRUCTURE ABOVE. THE FOUR (4) TAUT #12 GAGE WIRES, INCLUDING THEIR ATTACHMENT TO THE STRUCTURE ABOVE, MUST BE CAPABLE OF SUPPORTING FOUR (4) TIMES THE WEIGHT OF THE UNIT. <br />FLUSH OR RECESSED LIGHT FIXTURES, WEIGHING LESS THAN 56 LBS. AND MECHANICAL TERMINALS AND SERVICES, WEIGHING LESS THAN 20 LBS., MAY BE SUPPORTED DIRECTLY ON THE RUNNERS OF <br />A HEAVY DUTY GRID SYSTEM BUT, IN ADDITION, THEY MUST HAVE A MINIMUM OF TWO (2) #12 GAGE SLACK SAFETY WIRES ATTACHED TO THE FIXTURE AT DIAGONAL CORNERS AND ANCHORED TO THE <br />STRUCTURE ABOVE. ALL 4 FT. X 4 FT. LIGHT FIXTURES MUST HAVE SLACK SAFETY WIRES AT EACH CORNER. <br />1.21 SUPPORT SURFACE MOUNTED LIGHT FIXTURES BY AT LEAST TWO POSITIVE DEVICES WHICH SURROUND THE CEILING RUNNER AND WHICH ARE EACH SUPPORTED FROM THE STRUCTURE ABOVE BY A <br />#12 GAGE WIRE. SPRING CLIPS OR CLAMPS THAT CONNECT ONLY TO THE RUNNER ARE NOT ACCEPTABLE. PROVIDE ADDITIONAL SUPPORTS WHEN LIGHT FIXTURES ARE 8 FT. OR LONGER. MAXIMUM <br />SPACING BETWEEN SUPPORTS SHALL NOT EXCEED 8 FEET. <br />1.22 SUPPORT PENDANT MOUNTED LIGHT FIXTURES DIRECTLY FROM THE STRUCTURE ABOVE WITH HANGER WIRES OR CABLES PASSING THROUGH EACH PENDANT HANGER AND CAPABLE OF SUPPORTING <br />TWO (2) TIMES THE WEIGHT OF THE FIXTURE. A BRACING ASSEMBLY, PER DETAIL 5 / A913, IS REQUIRED WHERE THE PENDANT HANGER PENETRATES THE CEILING. SPECIAL DETAILS ARE REQUIRED TO <br />ATTACH THE PENDANT HANGER TO THE BRACING ASSEMBLY TO TRANSMIT HORIZONTAL FORCE. IF THE PENDANT MOUNTED LIGHT FIXTURE IS DIRECTLY AND INDEPENDENTLY BRACED BELOW THE <br />CEILING, I.E. AIRCRAFT CABLES TO WALLS, THEN BRACE ASSEMBLY IS NOT REQUIRED ABOVE THE CEILING. SEE IR 16-9 FOR ADDITIONAL REQUIREMENT FOR PENDENT MOUNTED FIXTURES. <br />1.23 THE CEILING GRID SYSTEM MUST BE RATED AS HEAVY DUTY AS DEFINED BY ASTM C635. <br />1.24 METAL PANELS AND PANELS WEIGHING MORE THAN 1/2 PSF, OTHER THAN MINERAL FIBER ACOUSTICAL TILE, ARE TO BE POSITIVELY ATTACHED TO THE CEILING SUSPENSION RUNNERS. <br />1.25 ALL LIGHT-WEIGHT MISCELLANEOUS DEVICES, SUCH AS STROBE LIGHTS, SPEAKERS, ETC., SHALL BE ATTACHED TO THE CEILING GRID PER SECTION 7.1 OF IR. IN ADDITION, DEVICES WEIGHING MORE <br />THAN 10 LBS SHALL HAVE A #12 SLACK SAFETY WIRE ANCHORED TO THE STRUCTURE ABOVE. DEVICES WEIGHING MORE THAT 20 LBS SHALL BE SUPPORTED FROM THE STRUCTURE ABOVE <br />METAL SUSPENSION SYSTEMS FOR LAY-IN PANEL CEILINGS <br />ALL FLUSH OR RECESSED LIGHT FIXTURES WEIGHING 56 LBS. OR MORE AND MECHANICAL TERMINALS AND SERVICES, WEIGHING 20 LBS. OR MORE, MUST BE INDEPENDENTLY SUPPORTED BY NOT LESS <br />THAN FOUR (4) TAUT #12 GAGE WIRES, EACH ATTACHED TO THE FIXTURE AND TO THE STRUCTURE ABOVE. THE FOUR (4) TAUT #12 GAGE WIRES, INCLUDING THEIR ATTACHMENT TO THE STRUCTURE <br />ABOVE, MUST BE CAPABLE OF SUPPORTING FOUR (4) TIMES THE WEIGHT OF THE UNIT. <br />12 GA. HANGER WIRE, 3 TIGHT TURNS. <br />10 OR 12 GA. BRACING WIRE; 4 TIGHT <br />TURNS AT BOTH ENDS OF WIRE, <br />TYPICAL <br />12 GAUGE WIRE, TYPICAL - 12 GA. <br />WIRE SHALL BE 0.106 INCHES IN <br />DIAMETER CONFORMING TO ASTM <br />A641. 12 GA. WIRE SHALL BE SOFT <br />ANNEALED, GALVANIZED STEEL <br />WIRE WITH A CLASS 1 COATING. <br />NOTE: <br />HANGER OR BRACING WIRE ANCHORS TO <br />THE STRUCTURE AND SHOULD BE INSTALLED <br />IN SUCH A MANNER THAT THE DIRECTION OF <br />THE ANCHOR ALIGNS AS CLOSELY AS <br />POSSIBLE WITH THE DIRECTION OF THE <br />WIRE. <br />COMPRESSION STRUT <br />CROSS RUNNER <br />(4) 12 GA. BRACING WIRE AT EA. <br />COMPRESSION STRUT W/ MIN. 4 <br />TIGHT TURNS IN 1-1/2" BOTH ENDS OF <br />WIRE CONNECT TO MAIN RUNNER <br />12 GA. VERTICAL HANGER <br />WIRE AT 4'-0" EACH WAY (4' <br />OC. AT MAIN RUNNER) <br />MINIMUM 3 TIGHT TURNS IN <br />1 1/2" BOTH ENDS (TYPICAL) <br />2" (MAX) FROM BRACING <br />WIRES TO COMPRESSION <br />STRUT AND CROSS RUNNER <br />COMPRESSION STRUTS: <br />COMPRESSION STRUTS SHALL NOT REPLACE HANGER WIRES. MAXIMUM KL/R RATIO OF 200 <br />OR LESS. ATTACH COMPRESSION STRUTS TO MAIN RUNNERS WITHIN TWO (2) INCHES OF <br />CROSS RUNNER. THE ATTACHMENT AT THE TOP SHALL BE CAPABLE OF SUPPORTING FOUR <br />TIMES THE WEIGHT OF THE STRUT. <br />MAIN RUNNER <br />WALL SLIP <br />2" LEDGER <br />ANGLE <br />2" STANDARD LEDGER <br />ANGLE- CONNECT TO <br />STRUCTURE, NOT FINISH <br />RUNNER <br />SPLICE <br />POP RIVET <br />TYP. HANGER WIRE AT 4'-0" WITH <br />ONE PAIR OF BRACING WIRES <br />PARALLEL TO WALL AT 12'-0" O.C. <br />SEE SECTIONS 1.9, 1.10 AND 1.11 <br />TYPICAL <br />HANGER <br />WIRE <br />POP RIVET <br />CONNECTED WALLCROSS RUNNER OR MAIN RUNNER <br />HANGER WIRE, TYP. <br />#12 GAUGE MIN.HANGER WIRE @ 48" O.C. <br />MAX.EACH WAY (MAXIMUM 16 SQUARE <br />FEET SUPPORTED AREA) OR METAL <br />STUD COMPRESSION STRUT, ATTACHED <br />TO STRUCTURE ABOVE; PROVIDE STRUT <br />AT EACH BRACING ASSEMBLY, TYPICAL. <br />SCHEMATIC SUSPENDED LAY-IN PANEL CEILING FRAMING PLAN <br />BRACING ASSEMBLY <br />PER A-3.1 <br />ATTACHED (OR FIXED) EDGE <br />FREE EDGE <br />FR <br />E <br />E <br /> <br />E <br />D <br />G <br />E <br />AT <br />T <br />A <br />C <br />H <br />E <br />D <br /> <br />( <br />O <br />R <br /> <br />F <br />I <br />X <br />E <br />D <br />) <br /> <br />E <br />D <br />G <br />E <br />B <br />A-3.1 <br />A <br />A-3.1 <br />A <br />A-3.1 <br />B <br />A-3.1 <br />MAIN RUNNERS <br />CR <br />O <br />S <br />S <br />RU <br />N <br />N <br />E <br />R <br />S <br />SCHEMATIC SECTION <br />METAL T GRID <br />SUSPENSION SYSTEM <br />ACOUSTIC TILE <br />BLOCKING BETWEEN <br />STUDS <br />METAL STUD <br />COMPRESSION STRUT, <br />ATTACH TO STRUCTURE <br />ABOVE; PROVIDE STRUT <br />AT EACH BRACING <br />ASSEMBLY PER A-3.2 <br />INTERIOR STUD WALL PER <br />PLAN AND WALL SCHEDULE <br />A-3.1 <br />A/B <br /> 6" <br />M <br />A <br />X <br />. <br />CROSS METAL RUNNER <br />MAIN METAL RUNNER <br />SUSPENDED LIGHT FIXTURE <br />ATTACHED TO CEILING GRID <br />TO RESIST HORIZONTAL <br />FORCE EQUAL TO WEIGHT OF <br />FIXTURE WITH SCREWS <br /> #12 STEEL WIRE HANGERS, <br />ATTACH TO PERMANENT <br />STRUCTURE, TYPICAL 6 PLACES <br />A B <br />DETAILS <br />10 <br />9 <br /> <br />E <br /> <br />4 <br />T <br />H <br /> <br />S <br />T <br />. <br />, <br /> <br />S <br />A <br />N <br />T <br />A <br /> <br />A <br />N <br />A <br />, <br />C <br />A <br /> <br />9 <br />2 <br />70 <br />1 <br />AR <br />T <br />E <br /> <br />R <br />E <br />S <br />T <br />A <br />U <br />R <br />A <br />N <br />T <br />SHEET NO.: <br />RE <br />V <br />I <br />S <br />I <br />O <br />N <br />SHEET TITLE: <br />DATE: SCALE: <br />02/21/2025 <br />5- <br />2 <br />8 <br />- <br />2 <br />5 <br />1S <br />T <br /> <br />H <br />E <br />A <br />L <br />T <br />H <br /> <br />P <br />C <br />CD <br />I <br />Ci <br />r <br />c <br />a <br /> <br />D <br />o <br />m <br />i <br />n <br />i <br /> <br />I <br />n <br />t <br />e <br />r <br />n <br />a <br />t <br />i <br />o <br />n <br />a <br />l <br />, <br /> <br />L <br />L <br />C <br />En <br />g <br />i <br />n <br />e <br />e <br />r <br />i <br />n <br />g <br /> <br />- <br /> <br />C <br />o <br />n <br />s <br />u <br />l <br />t <br />i <br />n <br />g <br />98 <br />9 <br />0 <br /> <br />R <br />e <br />s <br />e <br />a <br />r <br />c <br />h <br /> <br />D <br />r <br />. <br />, <br /> <br />S <br />u <br />i <br />t <br />e <br /> <br />1 <br />0 <br />0 <br />, <br /> <br />I <br />r <br />v <br />i <br />n <br />e <br />, <br /> <br />C <br />A <br /> <br /> <br />9 <br />2 <br />6 <br />1 <br />8 <br />Ph <br />o <br />n <br />e <br />. <br /> <br />( <br />9 <br />4 <br />9 <br />) <br /> <br />5 <br />3 <br />3 <br />- <br />4 <br />1 <br />1 <br />7 <br /> <br />9- <br />4 <br />- <br />2 <br />5 <br />2N <br />D <br /> <br />H <br />E <br />A <br />L <br />T <br />H <br /> <br />P <br />C <br />10 <br />- <br />7 <br />- <br />2 <br />5 <br />1S <br />T <br /> <br />B <br />U <br />I <br />L <br />D <br />I <br />N <br />G <br /> <br />P <br />C <br />10 <br />- <br />7 <br />- <br />2 <br />5 <br />3R <br />D <br /> <br />H <br />E <br />A <br />L <br />T <br />H <br /> <br />P <br />C <br />2N <br />D <br /> <br />B <br />U <br />I <br />L <br />D <br />I <br />N <br />G <br /> <br />P <br />C <br />A-3.1