Distribution Range · Vetted Partner Mills · Ahmedabad
Tie Rod Manufacturer & Formwork Shuttering Hardware
D15 and D20 continuous coil-threaded formwork tie rods supplied alongside matching malleable wing nuts, anchor spreader plates, water-stop assemblies, and chamfer cones. Sourced through vetted primary mills in Ahmedabad with complete EN 10204 3.1 MTC pass-through.
Overview: formwork tie rods, shuttering mechanics & supply model
In reinforced cement concrete (RCC) construction, the formwork tie rod is the critical tensile element that holds opposing timber, steel, or aluminum shuttering panels together during high-pressure concrete pours. As fresh concrete is placed, hydrostatic and dynamic pressures push outward against the form faces in accordance with DIN 18218 standards. Tie rods pass through the wall envelope, bearing the entire bursting force so wall thickness remains exact without panel blowout.
The primary formwork tie rod is characterized by a continuous, coarse, cold-rolled coil thread (10 mm pitch on D15 and D20). This self-cleaning pitch allows heavy cast-iron wing nuts to spin on and off effortlessly, even when the rod is caked with cured cement slurry or jobsite dirt. We distribute standard D15 and D20 coil rods in standard 6.0-meter lengths or precision cut-to-length bundles, accompanied by complete hardware kits including forged wing nuts, 120 mm anchor spreader plates, PVC chamfer cones, and cast water-stop barriers.
KP Fasteners supplies formwork tie rods through vetted, audit-verified partner primary rolling mills as part of our comprehensive civil hardware distribution portfolio. While our in-house manufacturing lines in our Ahmedabad manufacturing facility are dedicated to heavy custom foundation bolts for the column bases, stud bolts, and structural PEB sag rods, our wholesale distribution network enables civil contractors to consolidate their formwork hardware.
Civil contractors and shuttering subcontractors can consolidate their coil tie rods, wing nuts, water stoppers, and scaffold base jacks and formwork clamps onto a single purchase order, backed by verified EN 10204 3.1 mill test certificates.
Technical Disambiguation: Formwork Tie Rod vs. PEB Sag Rod vs. Continuous Stud Bolt
Industrial procurement terms frequently conflate threaded tension rods across civil and structural steel disciplines. Review the distinct applications below to ensure you order the exact engineered component:
Formwork Tie Rod (This Page)
Coarse coil thread (D15/D20). Temporary tensile rod clamped with wing nuts to resist fresh concrete hydrostatic pressure in RCC shuttering per DIN 18216 / EN 12812. Traded distribution line.
PEB Sag Rod (Structural)
Metric threaded ends (M12-M20). Permanent structural tension rod installed between PEB roof purlins or wall girts to resist lateral sag and dead loads. Manufactured in-house by KP Fasteners.
Explore PEB sag rods and bracing →Continuous Stud Bolt
Continuous metric/UN thread. Permanent alloy or stainless rod (ASTM A193 B7 / B8M) clamped with hex nuts for piping flanges and machinery mounts. Manufactured in-house.
Explore all-thread stud bolts →Tie-rod product families & shuttering accessory hardware
From standard high-rise shear wall shuttering to specialized water-retaining structures and structural sway bracing, we supply complete tie-rod hardware systems.
D15 Formwork Coil Tie Rod
The standard workhorse of high-rise building construction and commercial shuttering. Features continuous 10 mm pitch cold-rolled coil threads (outer diameter ~15.5 mm) delivering a reference safe working load of approximately 90 kN. Compatible with all standard D15 wing nuts and anchor plates.
- • Outer Diameter: 15.0 - 16.0 mm
- • Core Diameter: ~13.0 mm
- • Standard Length: 6.0 m bundles (cut to size)
D20 Heavy Formwork Coil Rod
Engineered for heavy civil engineering, massive foundation pours, bridge piers, and precast concrete manufacturing. Delivers a reference safe working load of approximately 160 kN, resisting extreme dynamic concrete heads without formwork bulging or deflection.
- • Outer Diameter: 20.0 - 21.0 mm
- • Core Diameter: ~17.5 mm
- • Standard Length: 6.0 m bundles
D22 / D24 Heavy Infrastructure Tie Rod
Specialized high-capacity tie rods specified on confirmed project engineering quotes for deep diaphragm walls, hydro-electric power dams, marine docks, and heavy industrial machine foundation blocks requiring safe working loads exceeding 195 kN.
- • Outer Diameter: 22.0 - 24.0 mm
- • Application: Deep civil infrastructure
- • Availability: Project-specific quote
Hex Wing Nuts (D15 / D20)
Manufactured from high-strength malleable cast iron or forged steel. Features dual wide wings spanning 100 mm for manual spin-on tightening and a wide hexagonal center boss compatible with standard scaffold wrenches or scaffolding podger spanners.
- • Drive: Manual wings + Hex center boss
- • Base: Integrated flat bearing face
- • Finish: Zinc electroplated or self-colour
Anchor Spreader Plates
Heavy structural steel load-distribution plates (standard 120×120 mm with 10 mm thickness) that bridge across double steel channel soldiers or timber walers, spreading the concentrated tension load across the formwork face to prevent timber crushing.
- • Dimensions: 120×120 mm (Custom on quote)
- • Hole Diameter: 20 mm central hole
- • Finish: Hot-dip galvanized or self-colour
Water-Stop Assemblies & Cones
For basement retaining walls and liquid-retaining tanks where tie rods penetrate the concrete thickness. Incorporates a cast iron central water barrier disc that blocks moisture capillary tracking, paired with reusable plastic cones for clean de-moulding.
- • Type: Cast iron seal with rubber flange
- • Cones: Reusable 22 mm HDPE plastic cones
- • Service: Water treatment, basements, culverts
Engineering standards cross-reference & safe working loads (SWL)
Shuttering tie systems operate under strict European and Indian falsework safety standards. Review the standard cross-reference and published mechanical load capacity data below.
Standards Harmonization: Falsework & Concrete Formwork
| Governing Standard | Publishing Body | Technical Scope | Engineering Implementation |
|---|---|---|---|
| EN 12812 | CEN (European Standard) | Falsework - Performance requirements and general design for formwork assemblies | Defines safety factors, structural deflection limits, and design load combinations |
| DIN 18216 | DIN (German Standard) | Formwork tie anchors - Anchor plates, wing nuts, and tie bars for concrete construction | Governs dimensional geometry, thread pitch profile, and proof tensile testing |
| DIN 18218 | DIN (German Standard) | Pressure of fresh concrete on vertical formwork | Specifies hydrostatic lateral pressure calculation models based on pour rate and slump |
| IS 14687 | BIS (Bureau of Indian Standards) | Guidelines for falsework for concrete structures | Indian standard detailing permissible stresses, lateral bracing, and tie-rod spacing |
| IS 2062 Grade E250 | BIS (Bureau of Indian Standards) | Hot rolled medium and high tensile structural steel | Specifies chemical melt limits (C ≤ 0.23%) and minimum yield strength of 250 MPa |
| EN 10080 | CEN (European Standard) | Steel for the reinforcement of concrete - Weldable reinforcing steel | Provides metallurgical and mechanical benchmarks for cold-rolled coil-thread profiles |
| ISO 898-1 | ISO (International Standard) | Mechanical properties of fasteners made of carbon steel and alloy steel | Governs proof load and hardness verification for companion hex nuts and anchor hardware |
Safe Working Load (SWL) & Ultimate Tensile Capacity
Reference tensile values summarized from international civil formwork engineering standards. The design safe working load incorporates a standard 2:1 factor of safety against ultimate tensile strength.
| Rod Type | Nominal Diameter | Thread Geometry | Typical UTS (MPa) | Reference SWL (2x Factor) | Recommended Formwork Service |
|---|---|---|---|---|---|
| D15 Formwork Tie Rod | 15.0 - 16.0 mm | Continuous 10 mm Pitch Coil Thread | ~500 MPa | ~90 kN (~9.1 Tonnes) | RCC columns, lift core shear walls, and perimeter foundation walls up to 3.5 m height |
| D20 Formwork Tie Rod | 20.0 - 21.0 mm | Continuous 10 mm Pitch Coil Thread | ~500 MPa | ~160 kN (~16.3 Tonnes) | Deep basements, bridge piers, precast concrete box culverts, and heavy shuttering |
| D22 / D24 Heavy Tie Rod | 22.0 - 24.0 mm | Continuous Heavy Coil Thread | ~500 MPa | ~195 - 230 kN (~19.8 - 23.4 T) | Mass concrete dams, deep diaphragm walls, and heavy industrial machine foundation forms |
| Structural Metric Tie Rod (M16 - M48) | 16.0 - 48.0 mm | Standard Metric Coarse Pitch (ISO 68-1) | 400 - 800 MPa (PC 4.6 / 8.8) | 45 - 350 kN (Tension Yield) | PEB roof diagonal turnbuckle bracing, canopy hanger stays, and marine bulkhead ties |
Source Footnote: Safe working load values are referenced from publicly cited DOKA, PERI, and MEVA technical product datasheets and standard EN 12812 falsework calculations. KP Fasteners’ certified lot-specific mechanical ratings are provided on the accompanying mill test certificate (MTC EN 10204 3.1) with each shipment.
Fresh concrete pressure calculation & tie-rod spacing guide
In accordance with DIN 18218 and IS 14687, the maximum lateral pressure exerted by fresh concrete on vertical shuttering depends on pour height, vertical concrete rise rate (m/hr), concrete temperature, and slump consistency.
| Formwork Height | Vertical Pour Rate | Max Concrete Pressure (DIN 18218) | Illustrative D15 Spacing Grid | Tributary Area / Rod | Typical Structural Application |
|---|---|---|---|---|---|
| 2.5 m Vertical Wall | 2.0 m / hour | ~55 kN/m² | 500 mm Vertical × 750 mm Horizontal | 0.375 m² | Standard residential and commercial building basement and core walls |
| 3.5 m Vertical Wall | 2.0 m / hour | ~70 kN/m² | 500 mm Vertical × 500 mm Horizontal | 0.250 m² | Heavy shear walls, commercial lift shafts, and infrastructure abutments |
| 4.5 m High-Pour Wall | 3.0 m / hour | ~90 kN/m² | 400 mm Vertical × 400 mm Horizontal | 0.160 m² | Rapid high-slump industrial pours, self-compacting concrete, bridge pylons |
Engineering Notice: Spacing calculations above are illustrative benchmarks for standard normal-weight concrete at 20°C. The shuttering designer or structural falsework engineer on record must calculate the specific tie rod spacing pattern based on actual concrete mix design, self-compacting concrete (SCC) fluidity, and vibration method. KP Fasteners supplies certified hardware, not formwork structural designs.
Indicative Shuttering Hardware Kit per 100 Meters of D15 Rod
For project estimating and bill of materials (BOQ) preparation, the following accessory quantities are typically paired per 100 linear meters of D15 coil rod based on average 2.0-meter wall pass-through lengths:
| Hardware Component | Material & Specification | Estimated Qty / 100m Rod | Functional Role in Shuttering Assembly |
|---|---|---|---|
| Hex Wing Nut (D15 / D20) | Malleable Cast Iron / Forged Steel | ~50 pcs (2 per 2 m rod run) | Two-wing or three-wing ergonomic profile; 100 mm span for rapid scaffold spanner or hammer tightening |
| Square Anchor Spreader Plate | Mild Steel IS 2062 / HDG (120×120×10 mm) | 50 pcs | Spreads tie-rod tension across timber walers or steel channel soldiers to prevent local formwork crushing |
| Water Bar / Water Stop Barrier | Ductile Cast Iron with PVC Sealing Flange | 25 pcs (Water-retaining walls) | Positioned at the midpoint of embedded rod; stops moisture penetration through concrete along the rod track |
| Plastic Chamfer Cones & Sleeves | High-Density Polyethylene (HDPE) | 50 pairs (Consumable sleeves) | Protects tie rod from slurry adhesion during pour; easily extracted post-cure for grout-plug patching |
| Heavy Flat Washer (D15 / D20) | Hardened Structural Carbon Steel | 100 pcs | Provides smooth bearing interface between the rotating wing nut base and the static anchor spreader plate |
Dimensional schedule & product specifications (D15 to D24 & M16 to M48)
Standard stocking inventory covers nominal diameters from D15 to D24 coil rods and M16 to M48 metric tension rods. Coil rods are stocked in 6.0 m bundles with automated cut-to-length service available.
| Product Designation | Nominal Outer Dia | Thread Pitch Profile | Available Length Range | Steel Grade / Class | Standard Surface Coatings | Governing Standard |
|---|---|---|---|---|---|---|
| D15 Formwork Coil Rod | 15.0 - 16.0 mm | Coil (10 mm Pitch) | Up to 6.0 m (Cut to Spec) | Mild Steel (500 MPa) | Self-Colour (Plain), Oil-Dipped, Hot-Dip Galvanized | DIN 18216, IS 14687 |
| D20 Formwork Coil Rod | 20.0 - 21.0 mm | Coil (10 mm Pitch) | Up to 6.0 m (Cut to Spec) | High-Strength Carbon Steel | Self-Colour (Plain), Hot-Dip Galvanized | DIN 18216, EN 12812 |
| D22 / D24 Formwork Coil Rod | 22.0 - 24.0 mm | Coil (10 mm Pitch) | Up to 6.0 m (On-Quote) | High-Strength Carbon Steel | Self-Colour (Plain) | DIN 18216, EN 12812 |
| Turnbuckle Tie Rod M16-M24 | 16.0 - 24.0 mm | Metric Coarse (ISO 68-1) | Cut to Architectural Drawing | IS 2062 E250 / Class 4.6 | Zinc Electroplated, Hot-Dip Galvanized | IS 1367, IS 800 |
| Turnbuckle Tie Rod M27-M36 | 27.0 - 36.0 mm | Metric Coarse (ISO 68-1) | Cut to Architectural Drawing | IS 2062 E250 / Class 8.8 | Hot-Dip Galvanized, Black Oxide | IS 1367, IS 800 |
| Heavy Bulkhead Tie Rod M42-M48 | 42.0 - 48.0 mm | Metric Coarse / Rolled Thread | Up to 12.0 m with Couplers | Property Class 8.8 / 10.9 | Hot-Dip Galvanized (ISO 1461) | ASTM A193, ISO 898-1 |
Tie rod variant matrix & surface protective treatments
Overview of standard SKU combinations detailing nominal diameter, thread geometry, material metallurgy, surface protection, and primary civil engineering use cases.
| Product Variant | Thread Form | Steel Material Grade | Surface Protection | Standard Supply Lengths | Target Civil / Structural Application |
|---|---|---|---|---|---|
| Formwork Coil Tie Rod D15 (Plain) | Continuous Coarse Coil (10 mm pitch) | Mild Steel (~500 MPa UTS) | Self-Colour (Lightly Oiled) | 1.0 m, 2.0 m, 3.0 m, 6.0 m | Standard RCC columns, beam boxes, and wall shuttering; consumable or multi-use with sleeve |
| Formwork Coil Tie Rod D15 (HDG) | Continuous Coarse Coil (10 mm pitch) | Mild Steel (~500 MPa UTS) | Hot-Dip Galvanized (ISO 1461) | 1.0 m - 6.0 m | Coastal construction, bridge piers, marine splash-zones, and long-stay external formwork |
| Formwork Coil Tie Rod D20 (Plain) | Continuous Heavy Coil (10 mm pitch) | High-Strength Carbon Steel | Self-Colour (Plain) | 1.0 m, 2.0 m, 3.0 m, 6.0 m | Heavy civil infrastructure, high-pour retaining walls, tunnel liners, and precast casting yards |
| Water-Stop Tie Rod Assembly | D15 Coil with Centered Sealing Disc | Cast Steel Core + PVC Sealing Lip | Self-Colour / Bitumen Primer | 0.5 m - 3.0 m (Cut to Wall Width) | Water retaining structures, underground metro boxes, wastewater treatment tanks, and swimming pools |
| PEB Structural Turnbuckle Tie Rod | Metric Left/Right Threaded Ends | IS 2062 Grade E250 / PC 4.6 | Zinc Electroplated (IS 1573) | Fabricated to Drawing | PEB roof diagonal bracing, canopy wind-trusses, and industrial warehouse lateral sway stabilization |
| Marine & Civil Bulkhead Anchor Tie Rod | M24 - M48 Rolled Metric Thread | Property Class 8.8 High-Tensile Steel | Hot-Dip Galvanized (ISO 1461) | Up to 12.0 m with Turnbuckles | Sheet-pile dock retaining walls, cofferdams, marine jetties, and deep basement tie-back anchors |
Engineering decision framework: selecting rod profile & application
Use this selection framework to match your project’s structural or concrete boundary conditions to the optimal tie rod system.
| Structural Application Context | Recommended Tie System | Material Grade | Protective Coating | Technical Justification & Operational Advantage |
|---|---|---|---|---|
| RCC Wall & Column Shuttering (Up to 3.5 m) | D15 Coil Tie Rod + Wing Nut | Mild Steel (500 MPa) | Self-Colour / Oiled | Continuous self-cleaning coil thread sheds slurry easily; wing nuts spin on in seconds with zero thread binding |
| Water-Retaining Walls & Basement Pours | D15 Water-Bar Tie Rod Assembly | Mild Steel + Cast Barrier | Self-Colour with PVC Seal | Integral center water-stop disc prevents capillary water seepage along the embedded rod after concrete cure |
| Heavy Retaining Walls & Infrastructure Pours | D20 Heavy Coil Tie Rod | High-Strength Carbon Steel | Self-Colour / HDG | Reference SWL of 160 kN resists severe hydrostatic pressures generated by high-pour-rate concrete pumps |
| PEB Structural Roof & Wall Sway Bracing | Turnbuckle Tie Rod Assembly (Metric) | IS 2062 E250 / PC 4.6 | Zinc Plated / HDG | Opposing left/right threaded ends allow turnbuckle rotation to pull diagonal framework into strict plumb |
| PEB Roof Purlin & Girt Dead-Load Sag Mitigation | PEB Sag Rods (Threaded Ends + Jam Nuts) | IS 2062 Grade E250 | Zinc Plated / HDG | Engineered specifically to support purlin channel dead-load; redirect to our dedicated Sag Rods page |
| Structural Steel Column Base Anchoring | Cast-in Foundation Bolts (L/J/Plate) | IS 2062 / Property Class 8.8 | HDG / Black | Embedded into reinforced concrete footings to resist uplift and overturning; redirect to Foundation Bolts |
Formwork System Compatibility
Our D15 and D20 coil rods are compatible with standard Indian, European, and international modular shuttering frames. We supply generic high-grade coil rods; specific proprietary trademark accessories are sourced and certified upon project request.
Waterproofing & Retaining Pours
Never utilize plain through-rods without water-stops on underground water tanks or basements. Always specify water-stop tie rod assemblies with central cast barrier discs to eliminate capillary leakage channels through the set concrete.
Structural PEB Bracing Stays
For structural portal frame tension bracing, specify turnbuckle tie-rod assemblies with right/left threaded ends to pull steel columns into plumb. For light purlin alignment, redirect to our manufactured PEB sag rods.
Industrial applications: high-rise RCC, infrastructure & PEB bracing
From commercial high-rise tower cores to heavy bridge piers and precast yards, tie rods provide essential tensile resistance across modern civil construction.
RCC High-Rise Shuttering & Shear Walls
D15 continuous coil tie rods paired with malleable iron wing nuts and 120 mm spreader plates clamp formwork shutters across building elevator cores, column boxes, and shear walls against lateral concrete pressure.
Heavy Civil Infrastructure & Bridge Piers
D20 high-load coil rods provide the 160 kN safe working load needed for deep flyover abutments, bridge pylons, retaining walls, and hydro-power culverts where pour rates create extreme dynamic concrete head.
Water-Retaining & Subterranean Concrete
Water-stop tie rod assemblies containing central cast barriers eliminate capillary groundwater seepage paths through basement perimeter walls, sewage treatment digesters, and commercial underground pump rooms.
Precast Concrete Manufacturing Yards
Precast casting yards employ reusable D15 and D20 tie rods across modular steel moulds for precast box culverts, retaining wall panels, and prestressed girder shuttering requiring repeatable rapid assembly.
PEB Structural Bracing & Turnbuckle Stays
Fabricated metric tie-rod assemblies equipped with central forged turnbuckles provide diagonal tension bracing across industrial PEB portal frames, canopy cantilevers, and structural crane gantry towers.
Scaffolding Falsework & Staging Assemblies
Formwork tie rods integrate directly with scaffold wall clamps, push-pull props, and heavy staging towers, securing vertical shuttering panels to exterior tubular scaffold staging.
Related structural & civil engineering fasteners
Consolidate your civil hardware procurement by pairing formwork tie rods with companion scaffold staging jacks, foundation anchors, and structural PEB sag rods.
PEB Sag Rods
In-house manufactured tension sag rods with single-end or double-end threading for secondary structural steel purlin and girt alignment.
PEB sag rods and bracing
Foundation Bolts
Heavy L-type, J-type, and plate-welded anchor bolts manufactured in Ahmedabad for PEB column base plate foundation anchoring.
foundation bolts for the column bases
Scaffold Accessories
Formwork clamps, swivel couplers, hollow base jacks, and u-head jacks supporting complete concrete staging installations.
scaffold base jacks and formwork clamps
Construction & Infrastructure Fasteners
Comprehensive fastener catalog for EPC contractors, covering bridge bearings, PEB frameworks, and structural heavy connections.
RCC and PEB construction fasteners
Custom Fasteners
Specialized tension rods, oversized marine bulkhead tie-backs, and bespoke threaded components machined to structural engineering drawings.
custom drawing-based tie rodsFrequently asked questions: formwork tie rods & shuttering systems
Technical answers regarding tie-rod diameter selection, concrete pressure resistance, formwork system compatibility, and delivery logistics.