The drawing provides clear guidelines and dimensional criteria for creating rectangular and circular openings in concrete walls for mechanical, electrical, and plumbing conduits. It details minimum clearance dimensions, spacing requirements between multiple adjacent conduits, and sizing limitations for clustered penetrations. Additionally, it specifies requirements for maintaining or supplementing structural wall reinforcing patterns and adding trim bars around wall penetrations.
Text on the drawing
d D D 1" TYP. ALL SIDES 2'-0" MAX. 4'-0" MAX. 2. FOR A SERIES OF HORIZONTAL OR VERTICAL CONDUITS, PROVIDE MIN. CLEAR SPACING OF 4" OR THE MAX. DIAMETER OF ADJACENT OPENINGS, WHICHEVER IS GREATER. 3. FOR CONDITIONS WHERE MULTIPLE CONDUIT OPENINGS ARE TIGHTLY CLUSTERED, CONTRACTOR MAY OPT TO PROVIDE A SINGLE LARGE OPENING, WITH PRIOR REVIEW & APPROVAL OF ENGINEER. MAX. SIZE TO BE 4'-0" WIDE x 2'-0" HIGH. 4. WHEREVER POSSIBLE, LOCATE SMALL OPENINGS SUCH THAT TYPICAL WALL REINFORCING PATTERN IS NOT INTERRUPTED. A. FOR SINGLE WALL OPENING WITH MAX. DIMENSIONS LESS THAN REINFORCING SPACING MINUS 4", PLACE OPENINGS SO AS NOT TO INTERRUPT REINFORCING. B. WHERE REINFORCING IS INTERRUPTED, PROVIDE MATCHING STEEL TO LAP WITH INTERRUPTED BARS. LENGTH OF LAPPING BARS TO BE TWICE LAP SPLICE LENGTH SHOWN ON TYPICAL DETAIL SHEET PLUS DEPTH OR LENGTH OF INTERRUPTION. 5. PROVIDE TRIM BARS AROUND ALL WALL PENETRATIONS LARGER THAN 10" x 10". A. FOR CLEAR SPACING BETWEEN OPENINGS BETWEEN 4" & 8", PROVIDE A MIN. OF ONE PAIR OF #6 TRIM BARS, w/ LENGTH EQUAL TO SIZE OF OPENINGS PLUS 6'-0". B. FOR CLEAR SPACING BETWEEN OPENINGS GREATER THAN 8", PROVIDE A MIN. OF TWO PAIRS OF #6 TRIM BARS, w/ LENGTH EQUAL TO SIZE OF OPENINGS PLUS 8'-0". C. REF. TYP. WALL REINFORCING AT OPENINGS FOR TRIM STEEL AT ALL OTHER LOCATIONS. 6. NO OPENINGS FOR CONDUITS ARE PERMITTED IN STEEL BEAMS, COLUMNS, OR CONNECTING PLATES ENCASED IN CONCRETE WALL. 7. REF. MECH, ELEC, AND PLUMBING FOR ALL WALL OPENINGS NOT SHOWN ON STRUCTURAL DRAWINGS. CONTRACTOR TO COORDINATE PLACEMENT OF THESE OPENINGS AND PROVIDE REINFORCING AS REQUIRED BY THESE NOTES. OPENING DIA. TO BE d + 2" MAX. OF D OR D , MIN. OF 4" 1 2 1 1. ALL RECTANGULAR OPENINGS TO BE MINIMUM 1" CLEAR ON ALL SIDES OF CONDUIT. CIRCULAR WALL OPENING TO BE OF DIAMETER 2" LARGER THAN NOMINAL CONDUIT DIAMETER. PROVIDE CLOSURE AS PER MECH, ELEC, AND PLUMBING DRAWINGS.
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