3a. referring to Part 3.2.5.3(b) and Figure 3.2.5.1 of the NCC 2015 BCA Volume Two Class1 & 10 Describe with the aid of a sketch how to reduce shrinkage cracks in a typical concrete slab.
3b. referring to Q3a, state the (3) three different types of steel reinforcement that can be used, the minimum length and how it must be placed and where.
3c. referring to the above, describe with the aid of a sketch the potential locations and effects of shrinkage in cases where reinforcement is omitted in any concrete slab.
3d. referring to Sheet # S101 of the Structural drawings state the RE specified for the ground floor slab and at how many locations
3e. referring to Sheet # S203 of the Structural drawings state the (2) different types of corner reinforcement specified for the upper suspended floor slab and at how many locations for each type.
3f. referring to Sheet # S101 and S203 of the Structural drawings fill in the schedule below pertaining to the required corner / re-entrant reinforcement.
| # of different Types Specified 1-3 | # of bars | Grade type | Diameter of bars mm | Spacing of bars mm | B = Bottom Reo B1 = up/down B2 = Left/right | T = Top Reo T1 = up/down T2 = Left/right T3 = Diagonally | Tied to | Length mm | Location Ground/F Upper /F |
| 1 | | | | | | | | | |
| 2 | | | | | | | | | |
| 3 | | | | | | | | | |
5206 ABUT & SITE WELD LINTEL TO COLUMN FACE T-LINTEL 11 @28c T-LINTEL T4 @ 31C CONTINUOUS 1 1R10 GALV ROD CENTRAL TO PIER. COG 150 INTO FOOTING ALTERNATIVELY DRILL AND EPOXY GROUT 150 INTO FOOTING. THREAD AT TOP AND FIX TO T-LINTEL OVER (TYPICAL AT I LOCATIONS) 5.208 VOID BUILDER'S NOTE: ATTACHED PIER TO PROVIDE MIN 350 x 190 BEARING TO EACH END OF BEAM OVER T-LINTEL T2 @ 280 $206 CB2 5205 T-LINTEL T3 @ 25C OD All T-LINTEL T1 @28c VOID 3 te SOFFIT STEP $200 EA1 CB1 Fiant ==== hool! EA1 10 SLAB STEP BUILDER'S NOTE: PROVIDE EXTRA BRICK LEAF TO PIER TO PROVIDE MIN 290 x 190 BEARING TO EACH END OF BEAM OVER S206 T-LINTEL T3 @ 25c. MITRE CUT & FULLY WELD AT CORNERS BALCONY SLAB VARIES 172 - 160 MIN. CURE CONCRETE CAREFULLY TO MINIMIZE SHRINKAGE CRACKING. DRAIN AND WATERPROOF TO BUILDERS DETAIL. T-LINTEL T3 @ 25c. MITRE CUT & FULLY WELD AT CORNERS. 1R10 GALV ROD CENTRAL TO PIER.COG 300 INTO SUSPENDED SLAB THREAD AT TOP AND FIX TO T-LINTEL OVER (TYPICAL AT O LOCATIONS) . 7 S20 8 5201 D 20mm SET DOWN EAS 310 HIGH . SUSPENDED SLAB LAYOUT 1:100 2c (172mm) THICK SLAB U.N.O. ( FFL= 33c 40MPa CONCRETE THROUGHOUT U.N.O. CB1 = 8c (686mm) DEEP X 190 WIDE DOWNTURN CONCRETE BEAM CB2 = 6c 514mm DEEP X 350 WIDE DOWNTURN CONCRETE BEAM. EA1 = 100 x 100 x 8.0 EA SHELF LINTEL, REFER TO SECTION 1 FOR DETAILS. 30c HIGH -2N16-150 B1 00SX 18 001-OZN? -N12-225 B2 2N16-150 B2 -3N24-100 81 N12-225 B1 -2N20-150 B2 -3N20-150 B2 N12-300 B1 5N24-100 B1 CB2 -3N20-150 B2 5N24-100 B1 N12-300 B1 -2N20-150 B2 -2N16-150 61 -N12 225 B1 -2N20-100 B1 N12-300 B1 -2N16-150 B2 1 N12-300 B1- N12-300 81- SUSPENDED SLAB BOTTOM STEEL LAYOUT 1:100 2c (172mm) THICK SLAB U.N.O. REFER TO S201. REFER TO S201 FOR CONCRETE GRADE 30 COVER TO REINFORCEMENT FROM EXPOSED SURFACES OF EXTERNAL CONCRETE BOTTOM DISTRIBUTION STEEL = N12-300 U.N.O. SITION DETAIL 3.2.5.3 FOOTINGS AND SLABS Figure 3.2.5.1 REINFORCING AT RE-ENTRANT CORNERS Re-entrant or internal corner reinforcing in accordance with 3.2.5.3(b) |2m 2 m Plan 5206 ABUT & SITE WELD LINTEL TO COLUMN FACE T-LINTEL 11 @28c T-LINTEL T4 @ 31C CONTINUOUS 1 1R10 GALV ROD CENTRAL TO PIER. COG 150 INTO FOOTING ALTERNATIVELY DRILL AND EPOXY GROUT 150 INTO FOOTING. THREAD AT TOP AND FIX TO T-LINTEL OVER (TYPICAL AT I LOCATIONS) 5.208 VOID BUILDER'S NOTE: ATTACHED PIER TO PROVIDE MIN 350 x 190 BEARING TO EACH END OF BEAM OVER T-LINTEL T2 @ 280 $206 CB2 5205 T-LINTEL T3 @ 25C OD All T-LINTEL T1 @28c VOID 3 te SOFFIT STEP $200 EA1 CB1 Fiant ==== hool! EA1 10 SLAB STEP BUILDER'S NOTE: PROVIDE EXTRA BRICK LEAF TO PIER TO PROVIDE MIN 290 x 190 BEARING TO EACH END OF BEAM OVER S206 T-LINTEL T3 @ 25c. MITRE CUT & FULLY WELD AT CORNERS BALCONY SLAB VARIES 172 - 160 MIN. CURE CONCRETE CAREFULLY TO MINIMIZE SHRINKAGE CRACKING. DRAIN AND WATERPROOF TO BUILDERS DETAIL. T-LINTEL T3 @ 25c. MITRE CUT & FULLY WELD AT CORNERS. 1R10 GALV ROD CENTRAL TO PIER.COG 300 INTO SUSPENDED SLAB THREAD AT TOP AND FIX TO T-LINTEL OVER (TYPICAL AT O LOCATIONS) . 7 S20 8 5201 D 20mm SET DOWN EAS 310 HIGH . SUSPENDED SLAB LAYOUT 1:100 2c (172mm) THICK SLAB U.N.O. ( FFL= 33c 40MPa CONCRETE THROUGHOUT U.N.O. CB1 = 8c (686mm) DEEP X 190 WIDE DOWNTURN CONCRETE BEAM CB2 = 6c 514mm DEEP X 350 WIDE DOWNTURN CONCRETE BEAM. EA1 = 100 x 100 x 8.0 EA SHELF LINTEL, REFER TO SECTION 1 FOR DETAILS. 30c HIGH -2N16-150 B1 00SX 18 001-OZN? -N12-225 B2 2N16-150 B2 -3N24-100 81 N12-225 B1 -2N20-150 B2 -3N20-150 B2 N12-300 B1 5N24-100 B1 CB2 -3N20-150 B2 5N24-100 B1 N12-300 B1 -2N20-150 B2 -2N16-150 61 -N12 225 B1 -2N20-100 B1 N12-300 B1 -2N16-150 B2 1 N12-300 B1- N12-300 81- SUSPENDED SLAB BOTTOM STEEL LAYOUT 1:100 2c (172mm) THICK SLAB U.N.O. REFER TO S201. REFER TO S201 FOR CONCRETE GRADE 30 COVER TO REINFORCEMENT FROM EXPOSED SURFACES OF EXTERNAL CONCRETE BOTTOM DISTRIBUTION STEEL = N12-300 U.N.O. SITION DETAIL 3.2.5.3 FOOTINGS AND SLABS Figure 3.2.5.1 REINFORCING AT RE-ENTRANT CORNERS Re-entrant or internal corner reinforcing in accordance with 3.2.5.3(b) |2m 2 m Plan
