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INFRA

ADSS installation accessories & fixtures

Every spanholds.

Fly up one village pole and stop at each of the 12 fittings on it
Or just scroll on — the range is next
Scroll to climb

§ 01 — The fittings, up close

Builtto hold.

01SYN-T1-TPA

Tension Pole Assembly

Open fitting→

§ 02 — Why this hardware exists

No metal
in the cable.
All of it
in the fittings.

§ 03 — The assemblies

010203040506
Tension assembly for ADSS cable
After TEC GR/TX/OAF-001/03 · BSNL Type-II
Drawing
12.1 (A)
Syntel Infra
SYN-000 · Rev A

Bill of material · OFC tension termination fittings

Take it apart in 3D →

Also required per route: demountable pulley (installation) and cable storage bracket with 1.5 m SS strap and two buckles at splice points.

§ 04 — The range

TEC GR/TX/OAF-001/03 sorts every accessory into three types, and a purchaser specifies by type. So do we: heavy helix for long rural spans, light helix for urban routes, wedge for fast, tool-less drops.

§ 05Numbers the GR holds us toTEC GR/TX/OAF-001/03
34

Drawings in the governing GR

100 m

Maximum span, pole to pole

10M

Vibration cycles, type tested

16 kN

Highest anchoring load value

§ 06 — Type tests

Tested to the point
of letting go.

Fourteen tests in the GR, from a visual check to ten million cycles of galloping on a hundred-metre span. A helix has to hold — and then, past its rating, slip, because a fitting that never lets go destroys the cable.

The full regime →
Test 01 Live

Visual examination

Workmanship and finish on every accessory and fixture, before anything else is done to it.

No manufacturing defects

Test 02 Live

Verification of dimensions

Every fitting checked against the dimensions on its own drawing.

IS 2102 class C

Test 03 Live

Verification of raw material

Data sheet and mill test certificate checked against the material column of the drawing.

Certificate per lot

Test 04 Live

Tensile strength

Load-bearing metal fittings taken to their rated load on a calibrated rig.

6W / 3W / 2.5W, safety factor 2

Test 05 Live

Slip strength

Terminating helix loaded on cable until it moves. It must hold, then slip — a grip that never releases destroys the cable.

No slip below 90% of 6W

Test 06 Live

Resilience

Formed fittings wrapped and unwrapped on cable three times in succession, then slip tested again.

Passes after third application

Test 07 Live

Galloping / fatigue

A complete tension set and suspension set on a 100 m span, driven at anti-nodal amplitude of a full cable diameter.

10 M cycles, 30–100 Hz

Test 08 Live

Aeolian vibration

The same assembly at half a cable diameter, across the frequency band wind actually excites.

10 M cycles, 10–100 Hz

Test 09 Live

Attenuation under load

Optical loss measured on every fibre after the dead-end assembly has been installed and loaded.

≤ 0.1 dB after recovery

Test 10 Live

Wrapping

Formed aluminium alloy wire wrapped on a mandrel of its own diameter to a close helix.

8 times, no fracture

Test 11 Live

Galvanising

Coating uniformity on every galvanised component.

IS 2633 uniformity

Test 12 Live

Shore hardness

Durometer on the polychloroprene inserts of suspension and jumper clamps.

65 – 80 Shore A

Test 13 Live

Climatic ageing

Wedge-type clamps held at 70 °C facing the light source, then tensile tested again inside 72 hours.

≥ 80% of rated load

Test 14 Live

Corrosion

Wedge-type clamps in a gaseous atmosphere in their service position, then retested.

No trace of rust

VID-01
§ 07 — The works

Forged, dipped,
formed, pulled.

Hot forging · machining · hot-dip galvanising to IS 2629 · helix forming · proof load — under one roof.

§ 08 — Where the line goes

IMG-01
01
Energised spans

Power Line Alignments

Fibre on a live transmission or distribution alignment, strung without an outage.

Cable diameter
15 – 17 mm
Tensile strength
11.2 – 14 kN (6W)
IMG-02
02
Long spans

Hilly and Rural Areas

Long spans over ground that will not take a trench, following the terrain on poles.

Cable diameter
15.1 – 18.5 mm
Tensile strength
11.5 – 16.75 kN (6W)
IMG-03
03
Dense routes

Urban Alignments

Short spans, dense pole routes and constant access — where installed cost per pole decides.

Cable diameter
11.2 – 14.7 mm
Tensile strength
3.4 – 5.8 kN (3W)
IMG-04
04
Subscriber drop

Last Mile and Drop Cable

Aerial drop from the distribution pole to the subscriber, at 6.5 to 7.5 mm.

Cable diameter
6.5 – 7.5 mm
Tensile strength
1.0 – 1.23 kN (2.5W)

§ 09 — Span planner

< 15 mm: light-duty Type-II helix range assumed. Quantities follow the BSNL BOM for Type-II installation accessories; add angle and splice poles as tension points.

Strip map92 poles · 11 T · 81 S
§ 10Standards invoked
TEC GR/TX/OAF-001/03Installation accessories for aerial OFC✳IEEE 1222Galloping and aeolian vibration test method✳IEC 60794-1-2-E1Tensile performance of the fitting on cable✳NF EN 50483-6Climatic ageing and corrosion, wedge type✳IS 2629Hot-dip galvanising practice✳IS 2633Uniformity of the galvanised coating✳
IS 617Aluminium alloy for die castingsIS 6061Aluminium alloy wire for formed helixIS 2062 / IS 2004Structural and forged steelIS 3400 Pt 10Compression set of the elastomerIS 2102General dimensional tolerancesISO 9001Quality management system
Syntel Infra
TEC GR/TX/OAF-001/03
000