Savings in steel consumption

Based on proof or yield strength of steel
1 mt of torkari replaces 1.33 mt of tor-40 ( fe-415)
1 mt of torkari replaces 2.42 mt of ms ( fe-250)

QUANTITY SAVINGS CHART
SLABS TORKARI TORSTEEL MS

BASED ON PROOF OR YIELD STRENGTH

1 MT

1.325 MT

2.42 MT

Slab Thickness

Based on Min. Area of Steel , Min. dia available and Max. spacing permitted

100 mm

1 MT

1.57 MT

1.67 Mt

120 mm

1 MT

1.47 MT

1.67 MT


Substitution Chart based on Strength Considerations.
Tor – 40 or Fe- 415 TORKARI
8mm @ spacing S mm 7mm @ spacing S mm
10mm @ spacing S mm 9mm @ spacing 1.07Smm or 8.5mm @ spacing S mm.
12mm @ spacing S mm 9mm @ 0.75 S mm
16mm @ spacing S mm 9mm @ 0.42 S mm.

Substitution Chart for Distribution Steel in Slabs
From Original Design with Convert to
8mm Tor-40 (Fe-415) 7mm TORKARI with no change in spacing
6mm MS 5mm TORKARI with no change in spacing

CONVERSION TO TORKARI STIRRUPS

CONVERT FROM

CONVERT TO TORKARI

Grade of Steel
N/sq.mm

Dia & spacing of stirrups

Based on restricted Characteristic strength of 415N/sq.mm

Based on Actual proof strength of 550

Fe-415 ( Tor-40)

8mm @ S mm c/c

7mm @ 0.77S mm c/c

7mm @ S mm c/c

Fe-415 Tor-40

10mm @ S mm c/c

9mm @ 0.8 S mm c/c

9mm @ 1.07 S mm c/c

Fe-415 Tor-40

12mm @ S mm c/c

9mm @ 0.56 S mm c/c

9mm @ 0.74 S mm c/c

MS  Fe-250

5, 6, 6.5 or 7mm @ S c/c

5mm @ S mm c/c

5mm @ S mm c/c


CONVERSION TO COLUMN TIES
From Original Design with Convert to Remarks
8mm Tor-40 / Fe-415 7mm Torkari with no change in spacing This conversion ensures atleast same strength as with original design
7, 6.5, 6 mm MS Fe-250 5mm Torkari with no change in spacing

COST SAVINGS AS PER DESIGN
TORKARI TORSTEEL MS
BASED ON PROOF OR YIELD STRENGTH

1 MT

1.325 MT NA
BASIC RATE / TON 37960/- 32400/- NA
COST 37960/- 42930/- NA

COST SAVINGS  – Price Comparison Torkari Vs TMT
Sl No Grade Dia
in
mm
Noml. Wt/m
tr
Length Mtr/ton Eqlnt. Qty Tons. Landed cost per ton Net Cost/MT Your Net Savings per ton(Rs) % of Cost Savings    *
1 TMT 10 0.617 1621 1.272 41000 52159 4159 8.0
TORKARI 9 0.485 2062 1.000 48000 48000
2 TMT 8 0.395 2532 1.308 42000 54934 6934 12.6
TORKARI 7 0.302 3311 1.000 48000 48000
3 M S 6 0.222 4505 1.442 48000 57662 9662 16.8
TORKARI 5 0.154 6494 1.000 48000  48000

COST SAVINGS FOR TYPICAL SLAB

SLAB PANEL = 4m x 4m ( 2 way slab)

1.SAVINGS DUE TO MATERIAL.
“Spacing as  per design” No of rods for 4 mt span per mt length
“Weight
in kgs”
Landed cost in Rs.per ton
Total Cost in Rs.
CONVENTIONAL DESIGN USING 8mm TMT
 8mm TMT @250 mm c/c 136 53.72 48380 2598.57
TORKARI DESIGN USING 7mm Torkari ( Fe-550) grade steel
 7mm torkari  @200mm c/c 136 41.072 55460 2277.85
SAVINGS 321.12
PERCENTAGE SAVINGS 12.36%
SAVINGS PER TON IN RS. 5,977.67
  2.SAVINGS DUE TO LABOUR
Steel Used “Labour cost
per ton”
“Weight in kgs
as per above”
“Labour cost for
above quantities”
8mm Tor-40 5000 53.72 268.60
7mm TORKARI 5000 41.072 205.36
SAVINGS in Rs.  63.24
PERCENTAGE SAVINGS 23.54%
SAVINGS PER TON IN RS. 1,177.22
TOTAL SAVING PER TON 7,154.89

PROJECT CASE STUDY – GREEN ACRES
S.No Tor-40 Wt/Mtr Qty.mt Rate/mt Amount
1 6mm MS 0.250 8.25 25480 204600
2 8mm 0.395 33.50 26000 871000
3 10mm 0.617 2.5 25600 64000
TOTAL 44.250 11,39,600
4 5mm Tk 0.154 5.082 30100 152968
5 7mm Tk 0.302 25.613 29400 753012
6 8mm Tk 0.500 2.026 29400 59562
TOTAL 32.721 9,65,542

TOTAL SAVINGS PER LOCK

1,74,057

% AGE OF SAVINGS

15%

SAVINGS FOR 21 BLOCKS

36.50 lakhs

L&T – SERENE COUNTY,HYDERABAD
Estimation of Steel Quantities
“Area per slab ( sq.ntr)” “Total Area
G+ 14 X 10 towers”
Co-efficient for 8mm Tor-40(kg/m3) “Total quantity of 8mm tor-40
( slab thickness = 115mm)”
2143 321450 65 2402.84
1.SAVINGS DUE TO MATERIAL
“Spacing as per design” Total length in mts Total Quantity in tons Landed cost per ton in Hyderabad in Rs.
( March 2008)
TOTAL COST
“8y( Fe-415)
@ 200mm c/c”
6083136.08 2402.84 43160 103706520
“7y ( TORKARI)
@ 200mm c/c”
6083136.08 1837.11 50805 93334226

TOTAL SAVINGS in Rs.

10372294

PERCENTAGE SAVINGS

10%

SAVINGS PER TON IN RS.

4317

TOTAL SAVINGS in Rs.

7930210

CLIENT: JAIN HOUSING , CHENNAI
PROJECT: INSELLI PARK OMR ( 588 flats – Multi storeyed building)

Grade

Dia

Weight per mtr

Estimated quantity in tons

Landed cost per ton

Amount in Rs.

MS 6mm 0.250 44 37500 1650000
tor-40 8mm 0.395 412 39200 16150400
tor-40 10mm 0.617 197 38800 7643600
Total Qty in ton 653 TOTAL 25444000

Grade

Dia

Weight per mtr

Equivalent Qty in tons

Landed cost per ton

Amount in Rs.

TORKARI 5mm 0.154 27 45655 1237433
TORKARI 7mm 0.302 315 45140 14218986
TORKARI 9mm 0.500 160 45140 7206305
Total Qty in ton 502 TOTAL 22662724
TOTAL COST SAVINGS IN Rs 2781276
% AGE OF COST SAVINGS 10.93%
SAVINGS PER TON 4259