Produk Pengikat Formwork

Q: What is the difference between a standard tie rod and a water-stop tie rod?

A standard through-tie is withdrawn and reused after the concrete cures, leaving a hole through the wall that must be plugged. A water-stop tie rod keeps a middle section permanently embedded, fitted with a welded water-stop plate that breaks the capillary water path along the bar. It is required for basements, water tanks, tunnels, reservoirs and any water-retaining structure.

Q: What is a five-section water-stop tie rod?

It consists of two reusable outer threaded bars, two plastic cones and one embedded middle bar with a welded water-stop plate. After stripping, the two outer bars are unscrewed and reused on the next pour; only the middle section stays inside the wall. This keeps consumable cost low while producing a watertight wall penetration.

Q: What is the load difference between D15 and D20 tie rods?

D15 and D20 refer to the nominal bar diameter (about 15 mm and 20 mm). At the same steel grade, tensile capacity scales with cross-sectional area, so a D20 bar carries roughly 1.7 to 1.8 times the load of a D15. D15 is typical for residential slabs and light walls; D20 is used for thicker walls, higher pour rates and heavier hydrostatic loads. Final selection must always be checked against the formwork pressure calculation for the specific pour height and rate.

Q: Which steel grade and surface treatment should I choose?

Formwork tie rods are commonly produced from medium and high carbon steel in 8.8 and 10.9 property classes. For corrosion protection: hot-dip galvanizing gives the thickest coating and suits outdoor and marine exposure; Dacromet (zinc-flake) coating avoids hydrogen embrittlement and is preferred for high-strength grades; electro-galvanized is an economical option for general use; black oiled bar is used indoors or where the rod is recovered and reused quickly.

Q: What determines the safe spacing of tie rods?

Tie spacing is governed by the maximum lateral pressure of fresh concrete, which depends on pour rate, concrete temperature, slump and wall height, plus the allowable load of the rod, the waler and the panel facing. Spacing must be calculated per pour, not copied from a previous project.

Batang pengikat, sistem penghalang air, koni, baut, dan aksesori sesuai standar DIN & ISO. Ukuran tidak standar dibuat sesuai gambar Anda.

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Batang Pengikat & Batang Pengikat Penghalang Air

Batang Pengikat D12

D12 all-thread form tie rod at 0.74 kg/m, produced on CNC thread-rolling lines for burr-free threads and consistent geometry. Tested tensile capacity by material: A195 35 kN and 35K 42 kN (2026 catalogue data). Cut to length from 200mm to 8000mm, supplied plain, electro-galvanized, hot-dip galvanized or Dacromet.

D12 all-thread rod, 0.74 kg/m
Tested tensile: A195 35 kN · 35K 42 kN (2026 catalogue)
Length 200–8000mm, cut to length
A195 / 35K alloy steel