Stark Steel
INTRODUCTION
- STARK STEEL are Micro Alloyed High Tensile STEEL RODS.
- These Rods are Cold Drawn & Stress Relieved by heat treatment for Improved Yield Strength.
- HIGH TENSILE STEEL RODS are TWISTED with each other forming a SINGLE STARK STEEL ROD.
PURPOSE
- Major challenges of the construction industry : high cost & consumption of steel.
- Solution : stark steel is a smart & sustainable solution.
- Replacement of tmt bars, steel fibers & weldmesh with stark steel rods for concrete elements
- Improve strength & reduce cost of construction.
TECHNICAL SPECIFICATIONS & COMPARISONS
| Parameter | STARK STEEL RODS Grade Fe – 1700 |
|---|---|
| Diameter | 5.2 mm |
| Cross sectional area | 21.2 sq. mm |
| Surface Finish | Three High Tensile Rods of 3mm thickness are twisted with each other like strands giving it ribs all around |
| Condition | Cold drawn, twisted and Stress relieved by heat treatment for improved Yield Strength |
| Yield Strength (The load at which it will enter plastic deformation i.e. irreversible deformation) | 1700 N/mm² |
| Steel Composition | Low phosphorous & sulphur content S&P % max. 0.045 |
APPLICATIONS
Warehouse & Industrial Concrete Flooring (Concrete Grade Slabs )
Deck & Mezzanine Concrete
Concrete Roads
Apartments, Hotels, Parking Area, School Arena, Layouts
point load test conducted by iit - hyderabad
PUNCHING SHEAR TEST SET UP
- What we propose: The use of STARK STEEL as Reinforcement , by REPLACING the conventional TMT Bars, Steel Fibres, Weld Mesh with our STARK STEEL Rods
- STARK STEEL can be used as Reinforcement for CONCRETE FLOOR SLABS as per TR 34 4th Edition or IS 456 Standards
- Tests Conducted: Four slabs each of size 1mtr x 1mtr x 170mm & 1mtr x 1mtr x 150mm were casted. We subject the Concrete Slabs to PUNCHING / POINT LOAD testing method. The tests were conducted at IIT Hyderabad under the supervision of the respected Dr . S. SURIYA PRAKASH, Professor Dept. of Civil Engineering, IIT Hyderabad. The results were;
Failure mode of the specimen D170_S150 & Load v/s Deflection Response Graph (D means depth and S means spacing of Stark Steel rebar)
Specimen 1
- Slab Dimensions: 1000 mm × 1000 mm × 170 mm
- Grade of Concrete: M25
- STARK STEEL Spacing: 150 mm c/c
- Cover from Bottom: 40 mm
| Sl. No. | Sample Specification | Cracking Load (Mt) | Ultimate Load (Mt) |
|---|---|---|---|
| 1 | D170_S150 | 11.290 | 19.730 |
Failure mode of the specimen D170_S200 (D means depth and S means spacing of Stark Steel rebar)
Specimen 1
- Slab Dimensions : 1000 mm × 1000 mm × 170 mm
- Grade of Concrete : M25
- STARK STEEL Spacing : 200 mm c/c
- Cover from Bottom : 40 mm
| Sl. No. | Sample Specification | Cracking Load (Mt) | Ultimate Load (Mt) |
|---|---|---|---|
| 1 | D170_S200 | 8.910 | 42.080 |
Failure mode of the specimen D150_S150 (D means depth and S means spacing of Stark Steel rebar)
Specimen 1
- Slab Dimensions : 1000 mm × 1000 mm × 150 mm
- Grade of Concrete : M25
- STARK STEEL Spacing : 150 mm c/c
- Cover from Bottom : 40 mm
| Sl. No. | Sample Specification | Cracking Load (Mt) | Ultimate Load (Mt) |
|---|---|---|---|
| 1 | D150_S150 | 7.530 | 45.610 |
Failure mode of the specimen D150_S200 (D means depth and S means spacing of Stark Steel rebar)
Specimen 1
- Slab Dimensions : 1000 mm × 1000 mm × 150 mm
- Grade of Concrete : M25
- STARK STEEL Spacing : 200 mm c/c
- Cover from Bottom : 40 mm
| Sl. No. | Sample Specification | Cracking Load (Mt) | Ultimate Load (Mt) |
|---|---|---|---|
| 1 | D150_S200 | 5.060 | 39.480 |
- ESR INDUSTRIAL & LOGISTICS PARK (Chennai & Rajpura)
- WELSPUN ONE LOGISTICS PARK (Lucknow & Hyderabad)
- HIRANANDANI INDUSTRIAL PARKS (Chennai)
- NDR WAREHOUSES (Pune, Kolkata, Chennai, Bangalore, Goa)
- LOGOS (Bangalore & Chennai)
- TVS INDUSTRIAL & LOGISTICS PARK (Coimbatore & Madurai Tamil Nadu)
- SHAKTI WAREHOUSING & LOGISTICS PARK ( Padhga, Maharashtra)
- UNO MINDA (Gurugram, Hosur, Manesar)
- ANTARIKSH LOGISTICS (1.2 Lakh & 1.7 Lakh SqFt, Near Padhga, Maharashtra)
- VRL Logistics (Gurugram & Bangalore)
- SAFE EXPRESS WAREHOUSE (Bihar, Patna)
- FLIPKART WAREHOUSE (8 Lakh SqFt , Narsapur, Bangalore)
- AVIGNA SPACE (14.5 lakh SqFt Warehouse & Industrial Park, Shoolagiri, Tamil Nadu)
- First Cry Warehouse( 4 Lakh SqFt, Bangalore, Karnataka)
SOME OF OUR PROJECTS & CLIENTS
DECK & MEZANINE CONCRETE FLOORING
- There has been a steep rise in the Use of PRE-ENGINEERED BUILDING STRUCTURES for COMMERCIAL & RESIDENTIAL BUILDINGS.
- These buildings make use of Decking Sheets for the Concrete Flooring Slab support.
- What we propose : The use of STARK STEEL as Re-inforcement , by REPLACING the conventional 8mm TMT Bars in the DECK or MEZANINE Concrete Floor slab.
WEIGHT COMPARISON
| Parameter | STARK STEEL RODS | 8.0 mm dia. Hot Rolled TMT Steel Bar Grade Fe-500 | 10.0 mm dia. Hot Rolled TMT Steel Bar Grade Fe-500 |
|---|---|---|---|
| Grams per Metre (approx) | 165 grams | 395 grams | 620 grams |
| Metre per 1Kg | 6 mtrs/1Kg | 2.5 mtrs/1Kg | 1.6 mtrs/1Kg |
- Stark Steel saves 40% on cost of steel and an additional 5% on wastage of TMT bars.
- Saves labour cost up to 20%.
- No steel wasted in lapping.
In terms of tonnage
- The weight ratio of 8mm V/s STARK STEEL is 3 : 1
- The weight ratio of 10mm V/s STARK STEEL is 5 : 1
- Suppose you have a requirement of 8mm TMT – 3 Mt this can be fulfilled by using STARK STEEL – 1Mt
- Suppose you have a requirement of 10mm TMT – 5 Mt this can be fulfilled by using STARK STEEL – 1Mt
| PARTICULARS | 150mm (6 inch) spacing | 200mm (8 inch) spacing | 250mm (10 inch) spacing | WASTAGE & LAPPING |
|---|---|---|---|---|
|
STARK STEEL (165gms/mtr) UTS: 1700 N/mm² | 2.100 Kg | 1.610 Kg | 1.290 Kg | 0.3 – 0.5% |
|
8MM TMT BARS (400gms/mtr) UTS: 550 N/mm² | 5.480 Kg | 4.300 Kg | 3.550 Kg | 3 – 5% |
|
7MM WELD MESH (TATA MAKE) UTS: 600 N/mm² | 4.030 Kg | 3.020 Kg | N/A | 3 – 5% |
|
STEEL FIBERS (BAEKART MAKE) UTS: 1200 N/mm² | 2.700 Kg | 2.250 Kg | N/A | 0.3 – 0.5% |
CONSUMPTION OF STEEL PER SQUARE METER
BENEFITS OF STARK STEEL
- Better Yield Strength : 1700 N/mm2
- Cost Effectiveness : Savings up to 40%
- No Lapping & No Wastage
- Helps Companies Reduce their CARBON FOOTPRINT.
- Cold drawn steel : Better Surface Finish
- Steady & Stable chemical composition
- Low Sulphur & Phosphorus content : Higher Ductility
- Material Delivery : Coils are Double Packed to avoid Rusting or Corrosion
- Reduced Labor Time & Cost : Lesser Quantity , Faster Work
- Environment friendly : No LPG or COAL is used in Manufacture.