Structural · S-FJGNH

Typical Small Opening in Floor Slab

Materials

Concrete Reinforced Concrete Metal (misc.)Composite

Elements

Beams Floors / Slabs Decks Reinforcing Roof / Floor Openings

Connections

Welded Connection Shear Stud / Composite Deck Attachment

About this detail

Framing and reinforcement requirements for small penetrations through a concrete over metal floor deck supported by steel beams. Steel angles measuring three-quarters of an inch by three-quarters of an inch by one-quarter of an inch are placed on top of the deck and extend three webs past the opening on each side. Openings are required to be blocked out with the deck left intact until the concrete has cured. Individual holes cutting no more than two adjacent webs for twelve-inch module deck are governed by specific spacing and dimension criteria to determine single or grouped opening classification. Additional reinforcement including number four bars at sixteen inches on center is specified for beams framing into columns.

1 NOTES: 1. THIS DETAIL APPLIES TO HOLES CUTTING NO MORE THAN (2) ADJACENT WEBS FOR 12" MODULE DECK. 2. OPENINGS SHALL BE BLOCKED OUT AND THE DECK LEFT INTACT. AFTER THE CONCRETE HAS CURED, THE DECK IN THE AREA OF THE OPENING CAN BE REMOVED. 3. ANGLES SHALL BE PLACED ON TOP OF THE DECK, ANGLES SHAL EXTEND 3 WEBS PAST THE DECK OPENING (TYP) IF DIMENSION A IS >4D 1 , 4D 2 , OR 32" WHICHEVER IS LARGER, THERE IS NO RESTRICTION ON DIMENSION B IF DIMENSION B IS >4D 1 , 4D 2 , OR 32" WHICHEVER IS LARGER, THERE IS NO RESTRICTION ON DIMENSION A 4. IF DIMENSIONS A AND B ARE <4D 1 , 4D 2 , OR 32" WHICHEVER IS LARGER, THE OPENING GROUP SHALL BE CONSIDERED AS A SINGLE HOLE, AND SHALL BE REINFORCED AS REQUIRED FOR LARGER OPENING , SEE FOLLOWING DETAIL. 5. INDIVIDUAL HOLES LESS THAN 6" IN DIAMETER AND CUTTING NO MORE THAN ONE WEB DO NOT REQUIRE REINFORCING. BM BLW L1 3/4"x1 3/4"x1/4" TYP A 2 B SINGLE OPNG CONSIDERED A 12" MAX D DECKING WEB OF STL 12" MAX D CONC OVER MTL DECK 1/8 1/2" ADJACENT TO EA CUT WEB TYP TACK WELD AT 24"oc MAX #4 x 7'-0" AT 16"oc ON ALL BMS FRAMING INTO COLS, STAGGER ENDS OF BAR 12" EVERY OTHER BAR HSA AT COMPOSITE BMS, SEE PLAN AND COMPOSITE BM NOTES FOR SIZE, NUMBER AND SPACING LOW FLUTE OVER BM GAGE CLOSURE AT GIRDER DEPTH SLAB CONC OVER MTL FLR DECK STL BM 1" CLR #4 x 7'-0" AT 16"oc ON ALL BMS FRAMING INTO COLS, STAGGER ENDS OF BAR 12" EVERY OTHER BAR CONC OVER MTL FLR DECK HSA AT COMPOSITE BMS, SEE PLAN AND COMPOSITE BM NOTES FOR SIZE, NUMBER AND SPACING STL BM GAGE CLOSURE AT GIRDER 0" TO 5" 5"+ TO 7 1/2" 7 1/2"+ TO 9" 20 16 14 L * METAL GAGE (TYPE) * NOT TO EXCEED 12". ABOVE GAGES ARE BASED ON FLAT MATERIAL WITH NO STRENGTH INCREASE DUE TO ITS SHAPE. RECOMMENDED GIRDER FILLER THICKNESS L 1" CLR NO SCALE: S601 1 TYPICAL SMALL OPENING IN FLOOR SLAB 1 NOTES: 1. THIS DETAIL APPLIES TO HOLES CUTTING NO MORE THAN (2) ADJACENT WEBS FOR 12" MODULE DECK. 2. OPENINGS SHALL BE BLOCKED OUT AND THE DECK LEFT INTACT. AFTER THE CONCRETE HAS CURED, THE DECK IN THE AREA OF THE OPENING CAN BE REMOVED. 3. ANGLES SHALL BE PLACED ON TOP OF THE DECK, ANGLES SHAL EXTEND 3 WEBS PAST THE DECK OPENING (TYP) IF DIMENSION A IS >4D 1 , 4D 2 , OR 32" WHICHEVER IS LARGER, THERE IS NO RESTRICTION ON DIMENSION B IF DIMENSION B IS >4D 1 , 4D 2 , OR 32" WHICHEVER IS LARGER, THERE IS NO RESTRICTION ON DIMENSION A 4. IF DIMENSIONS A AND B ARE <4D 1 , 4D 2 , OR 32" WHICHEVER IS LARGER, THE OPENING GROUP SHALL BE CONSIDERED AS A SINGLE HOLE, AND SHALL BE REINFORCED AS REQUIRED FOR LARGER OPENING , SEE FOLLOWING DETAIL. 5. INDIVIDUAL HOLES LESS THAN 6" IN DIAMETER AND CUTTING NO MORE THAN ONE WEB DO NOT REQUIRE REINFORCING. BM BLW L1 3/4"x1 3/4"x1/4" TYP A 2 B SINGLE OPNG CONSIDERED A 12" MAX D DECKING WEB OF STL 12" MAX D CONC OVER MTL DECK 1/8 1/2" ADJACENT TO EA CUT WEB TYP TACK WELD AT 24"oc MAX #4 x 7'-0" AT 16"oc ON ALL BMS FRAMING INTO COLS, STAGGER ENDS OF BAR 12" EVERY OTHER BAR HSA AT COMPOSITE BMS, SEE PLAN AND COMPOSITE BM NOTES FOR SIZE, NUMBER AND SPACING LOW FLUTE OVER BM GAGE CLOSURE AT GIRDER DEPTH SLAB CONC OVER MTL FLR DECK STL BM 1" CLR #4 x 7'-0" AT 16"oc ON ALL BMS FRAMING INTO COLS, STAGGER ENDS OF BAR 12" EVERY OTHER BAR CONC OVER MTL FLR DECK HSA AT COMPOSITE BMS, SEE PLAN AND COMPOSITE BM NOTES FOR SIZE, NUMBER AND SPACING STL BM GAGE CLOSURE AT GIRDER 0" TO 5" 5"+ TO 7 1/2" 7 1/2"+ TO 9" 20 16 14 L * METAL GAGE (TYPE) * NOT TO EXCEED 12". ABOVE GAGES ARE BASED ON FLAT MATERIAL WITH NO STRENGTH INCREASE DUE TO ITS SHAPE. RECOMMENDED GIRDER FILLER THICKNESS L 1" CLR NO SCALE: S601 1 TYPICAL SMALL OPENING IN FLOOR SLAB

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