BS 110A Rail Joint (Fish Plate)
A BS 110A rail joint, also known as a BS 110A fish plate, BS 110A fishplate, or BS 110A joint bar, is a standardized mechanical rail connection component manufactured in compliance with BS 47-1:1997. It is designed to align and securely connect the ends of BS 110A flat-bottom steel rails, which have a nominal weight of 54.523 kg/m and are manufactured to BS 11.
| Attribute | Details |
|---|---|
| Type | BS Standard Railway Fish Plates (Rail Joint Bars) |
| Material | Q235, 55# (High-strength steel for long service life) |
| Standard Compliance | BS47-1:1997 |
| Certification | ISO9001:2008 (Quality management system) |
| Surface Finish | Natural (as-cast) or custom paint/coating (per client requirements) |
| Hole Configurations | 4-hole, 6-hole (matches rail bolt patterns for fast installation) |
| Customization | Dimensions/designs tailored to BS standards or customer-provided drawings |
The BS 110A fishplate joint assembly transfers bending and shear loads across the rail joint under heavy axle loads while accommodating longitudinal thermal expansion of the rails.
BS 110A rail joints are available in 4-hole (508 mm) and 6-hole (914.4 mm) configurations. GNEE RAILWAY RAILWAYL supplies precision-machined, rolled, and forged BS 110A fishplates, together with compatible 1-inch and 1-1/8-inch high-tensile fish bolts, spring washers, and insulated joints.
Technical Specifications & Dimensions of BS 110A Rail Fish Plates
BS 110A fishplates are designed to match the fishing angles (slope profiles) between the underside of the rail head and the rail base flange of British Standard 110A rails, ensuring a high contact area, uniform clamp force distribution, and minimal vertical deflection.
1. BS 110A Fishplate Dimensional Data (4-Hole vs 6-Hole)
| Parameter | 4-Hole Fishplate | 6-Hole Fishplate |
|---|---|---|
| Applicable Standard | BS 47-1:1997 | BS 47-1:1997 |
| Overall Length | 508.0 mm (20.00 in) | 914.4 mm (36.00 in) |
| Bolt Hole Diameter | 26.99 mm (1-1/16 in / 1.0625 in) | 26.99 mm (1-1/16 in / 1.0625 in) |
| Matched Bolt Diameter | 1" (25.4 mm) / 1-1/8" (28.58 mm) Oval Neck | 1" (25.4 mm) / 1-1/8" (28.58 mm) Oval Neck |
| Hole Spacing (Center to Center) | 127.0 mm – 127.0 mm – 127.0 mm (5 in spacing) | 114.3 mm / 127.0 mm staggered pattern |
| Hole Geometry | Alternating Round & Oval (anti-rotation) | Alternating Round & Oval (anti-rotation) |
| Theoretical Weight (Pair) | 30.11 kg / pair (approx. 15.05 kg/pc) | 54.64 kg / pair (approx. 27.32 kg/pc) |
| Primary Application | Standard line maintenance, secondary tracks, yard sidings | Heavy freight corridors, high-impact switches, mainline curves |
Material Grades, Chemical Composition & Standards
GNEE RAILWAY RAILWAYL manufactures BS 110A joint bars in accordance with BS 47-1:1997 (Specification for Fishplates for Bull Head and Flat Bottom Rails), with material specifications based on BS EN 13674-1, BS 11, or client-specified railway authority standards.
| Steel Grade / Standard | C (%) | Mn (%) | Si (%) | P (max %) | S (max %) | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation A5 (%) |
|---|---|---|---|---|---|---|---|---|
| BS 47-1 Class A (50# / C45 Equivalent) | 0.45 – 0.55 | 0.50 – 0.80 | 0.15 – 0.35 | 0.040 | 0.040 | ≥ 550 | ≥ 320 | ≥ 18 |
| BS 47-1 Class B (55# / C55 Equivalent) | 0.50 – 0.60 | 0.50 – 0.90 | 0.15 – 0.35 | 0.035 | 0.035 | ≥ 650 | ≥ 380 | ≥ 15 |
Get BS 110A Fishplate Quote
GNEE RAILWAY RAILWAYL supplies BS 110A fishplates manufactured to BS 47-1:1997, with precision-machined, rolled, and forged options, strict dimensional and quality control, matched high-tensile fish bolts and washers, insulated and transition joint solutions, corrosion-protection options, and support for customized specifications and special project requirements.
Frequently Asked Questions
Q1: What is the difference between a 4-hole and 6-hole BS 110A rail joint?
A 4-hole fishplate is 508 mm long, while a 6-hole fishplate is 914.4 mm long. The suitable configuration depends on the project requirements.
Q2: Can BS 110A fishplates be used on BS 113A rails?
Not directly. BS 110A and BS 113A require compatible fishplates, or a suitable compromise/transition fishplate.
Q3: What bolts are used with BS 110A fishplates?
BS 110A fishplates can be supplied with compatible 1-inch or 1-1/8-inch high-tensile fish bolts.
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