DO’S AND DONT’S IN REINFORCEMENT DETAILING CHOICE OF MANDREL FOR BAR BENDING MIXED OF BARS 25 20 MANDREL 25 100 MANDREL d MANDREL DIA < 4d GENERAL d MANDREL DIA > 4d 4d DON’T DO DON’T DO DON’T DO TQR 40 (Fe 415) TQR 50 (Fe 500) COLUMN COLUMN COLUMN BARS (TQR 40) ELEVATION PLAN PLAN ELEVATION - TQR 40 (Fe 415) - TQR 40 (Fe 415) (ALTERNATIVELY ALL BARS TQ 60 (Fe 600) TO DESIGN) - TQR 50 (Fe 500) Acknowledgement: Sourced from ‘Reference Manual for Field Engineers on Building Construction’, Task Force for Quality Assurance in Public Constructions, Government of Karnataka
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DO’S AND DONT’S IN REINFORCEMENT DETAILING
CHOICE OF MANDREL FOR BAR BENDING
MIXED OF BARS
25
20
MANDREL
25
100
MANDREL
d
MANDRELDIA < 4d
GENERAL
d
MANDRELDIA > 4d
4d
DON’T
DO
DON’T DODON’T DO
TQR 40 (Fe 415)
TQR 50 (Fe 500)
COLUMN COLUMN
COLUMN BARS (TQR 40)
ELEVATION
PLAN PLAN
ELEVATION
- TQR 40 (Fe 415) - TQR 40 (Fe 415) (ALTERNATIVELY ALL BARS TQ 60 (Fe 600) TO DESIGN)- TQR 50 (Fe 500)
Acknowledgement: Sourced from ‘Reference Manual for Field Engineers on Building Construction’,Task Force for Quality Assurance in Public Constructions, Government of Karnataka
STAGGERING BARS FOR CONTINUITY IN COLUMNS
BAR LAPPING AT COLUMN - BEAM JUNCTION
Note: Alternatively, if staggering is not done, spacing of ties shall be reduced to half the normal spacing in the lapping region.
Acknowledgement: Sourced from ‘Reference Manual for Field Engineers on Building Construction’,Task Force for Quality Assurance in Public Constructions, Government of Karnataka
DEVELOPMENTLENGTH(MINIMUM)
COLUMNTIES
TIEPREFERABLE
COLUMNBARS
BEAM BARS
BEAM STIRRUPS
DON’T DO
DON’T DO
ABRUPT KINKING OF BARS OUTSIDE THE COLUMNS
ABRUPT KINKING OF BARS IN COLUMNS
DON’T DO
TIEPREFERABLE
COLUMNTIES
BEAM
EXPOSED BAR
DON’T DO
Acknowledgement: Sourced from ‘Reference Manual for Field Engineers on Building Construction’,Task Force for Quality Assurance in Public Constructions, Government of Karnataka
DISCONTINUITY OF BARS IN COLUMNS
DEFECTIVE PROVISION OF TIES IN COLUMN
THEPREFERABLE
(ALTERNATIVELYSTIRRUPS INBEAMS TO BECONTINUED)
TIE ATBEAM LEVEL
RECOMMENDEDWELD LENGTH
HOLE DRILLED ANDBAR ANCHOREDWITH BONDINGCHEMICAL
COLUMNBARSCOLUMN
DO
DO
DON’T
DON’T
160
MIN
Acknowledgement: Sourced from ‘Reference Manual for Field Engineers on Building Construction’,Task Force for Quality Assurance in Public Constructions, Government of Karnataka
LAPPING OF BARS IN TENSION MEMBERS
LEAVING THE BARS FOR FUTURE EXPANSIONFU
TURE
EXP
AN
SIO
N
BARS STRAIGHTENEDAS AND WHENCONSTRUCTION IS TAKEN UP
DUMMYCOLUMN
BARS COATEDWITH ZINCRICH PRIMER
BENT AT TOP
STIRRUPS AT1/2 SPACING
WELDEDJOINT
DODON’T
DO DODON’T
1d 10d
21d
Acknowledgement: Sourced from ‘Reference Manual for Field Engineers on Building Construction’,Task Force for Quality Assurance in Public Constructions, Government of Karnataka
LAPPING / PLACEMENT OF BARS IN BEAMS
CURTAILMENT OF BARS IN BEAMS
KINK 1 IN 10PREFERABLE
ABOUT12 DIA
CURTAILED BARS(>50%)
ABOUT12 DIAAst
DON’T
DO
DON’T
DO 0.1L
>0.2L
0.1L
A
A
B
B
>0.2L
Acknowledgement: Sourced from ‘Reference Manual for Field Engineers on Building Construction’,Task Force for Quality Assurance in Public Constructions, Government of Karnataka
DEFECTIVE POSITION OF BARS IN BEAMS
LAPPING OF BARS IN CANTILEVER BEAMS
MAIN REINFORCEMENT
MAIN REINFORCEMENT
CANTILEVER BEAM
1.2 TIMES DESIGN
EFFE
CTI
VE
DEP
TH
EFFE
CTI
VE
DEP
TH
CLEAR COVER
LAP LENGTH
R.C.BEAM
R.C.BEAM
DON’T
DON’T
DO
DO
DO
Acknowledgement: Sourced from ‘Reference Manual for Field Engineers on Building Construction’,Task Force for Quality Assurance in Public Constructions, Government of Karnataka
PLACEMENT OF BARS AT SLAB SUPPORT
UNEQUAL COVERS IN BEAMS
UNEQUALCOVER
EQUAL & ADEQUATECOVER
EQUAL & ADEQUATECOVERUNEQUAL
COVER
DON’T
DON’T
DO
DO
L0.2L
0.3L0.3L
Acknowledgement: Sourced from ‘Reference Manual for Field Engineers on Building Construction’,Task Force for Quality Assurance in Public Constructions, Government of Karnataka
MIXING UP OF BARS IN TWO-WAY SLABS
BAR PLACEMENT IN CANTILEVERED SLAB
TOR 50 ORTORKARI
TOR 40
CANTILEVERSLAB
DON’T
DON’T
DO
DO
L
0.3L
0.2L
TOR 40
TOR 40
Acknowledgement: Sourced from ‘Reference Manual for Field Engineers on Building Construction’,Task Force for Quality Assurance in Public Constructions, Government of Karnataka
REINFORCEMENT DETAILING IN GABLES
ARRANGEMENT OF BARS IN ONE-WAY SLAB
MAINBARS
MAINBARS
MAINBARS
DISTRIBUTIONBARS
DISTRIBUTIONBARS
DISTRIBUTIONBARS
SECTION A-APLAN - ONE - WAY SLAB
DO
DON’T
DO
DON’T
1d
A A
SECTION A-A
Acknowledgement: Sourced from ‘Reference Manual for Field Engineers on Building Construction’,Task Force for Quality Assurance in Public Constructions, Government of Karnataka
REINFORCEMENT DETAILING IN LARGE DOMES
REINFORCEMENT IN FOLDED STAIRCASE
DOME
DODON’T
1d
Acknowledgement: Sourced from ‘Reference Manual for Field Engineers on Building Construction’,Task Force for Quality Assurance in Public Constructions, Government of Karnataka
PLACEMENT OF BARS IN WAIST SLAB
REINFORCEMENT AT WALL INTERSECTIONS
WAIST SLAB
PLAN
ANCHORAGELENGTH
ANCHORAGELENGTH
WALL REINFORCEMENT
WALL REINFORCEMENT WALL REINFORCEMENT
WALL REINFORCEMENT
R.C. WALL
R.C. WALL R.C. WALL
R.C. WALL
WAIST SLAB
DON’T
DON’T
DO
DO
PLAN PLAN
PLAN
Acknowledgement: Sourced from ‘Reference Manual for Field Engineers on Building Construction’,Task Force for Quality Assurance in Public Constructions, Government of Karnataka
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