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 |
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SLABS | TORKARI | TORSTEEL | MS |
BASED ON PROOF OR YIELD STRENGTH |
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1 MT |
1.325 MT |
2.42 MT |
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Slab Thickness |
Based on Min. Area of Steel , Min. dia available and Max. spacing permitted |
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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. |
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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 |
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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 |
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Grade of Steel |
Dia & spacing of stirrups |
Based on restricted Characteristic strength of 415N/sq.mm |
Based on Actual proof strength of 550 |
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Fe-415 ( Tor-40) |
8mm @ S mm c/c |
7mm @ 0.77S mm c/c |
7mm @ S mm c/c |
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Fe-415 Tor-40 |
10mm @ S mm c/c |
9mm @ 0.8 S mm c/c |
9mm @ 1.07 S mm c/c |
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Fe-415 Tor-40 |
12mm @ S mm c/c |
9mm @ 0.56 S mm c/c |
9mm @ 0.74 S mm c/c |
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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 |
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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 |
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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 |
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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 |
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SLAB PANEL = 4m x 4m ( 2 way slab) |
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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 |
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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 |
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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 , CHENNAIPROJECT: INSELLI PARK OMR ( 588 flats – Multi storeyed building) |
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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 |