GJ-100 Galvanized Steel Strand 1x19 100 Square mm for Substation Guy Anchors

GJ-100 galvanized steel strand, 1x19, 100 square millimetre section, the workhorse guy strand on substation and tower projects.

GJ grades exist so that a design office and a purchasing office can talk about the same thing. GJ-100 means a nominal one hundred square millimetre steel section, hot dip galvanized, in a defined construction with a defined minimum breaking load. When a specification calls for it, buying a strand that looks about the right size is not the same purchase.

At one hundred square millimetres the strand is stiff, heavy enough to hang in a straight line, and it takes standard guy clamps and anchor rods without special fittings. This is the size we ship most often for substation guy sets and for tower anchor systems where the guy is part of the structural design and not an afterthought.

• Defined section, not an approximate size: One hundred square millimetres of steel is stated as nominal area with a defined tolerance, so the strength calculation in the design office holds. Buyers who substitute a similar looking strand usually discover the difference when the guy is tensioned to specification.
• 1x19 for clamp and anchor compatibility: The nineteen wire construction is the standard fit for guy clamps, thimbles, anchor rods and tensioning hardware used on transmission and substation work. No adapter fittings required.
• Hot dip zinc at standard class: Two hundred and fifteen to two hundred and sixty grams per square metre, suitable for inland and general industrial atmosphere. For coastal sites ask for the Class C version of the same strand.
• Low relaxation under sustained tension: Guy strands sit loaded for decades. Controlled drawing and stress relieving keeps relaxation low so the guy does not need re-tensioning after the first year of service.
• Predictable modulus for tension charts: Measured modulus on each lot, quoted on request, so the tensioning crew works from the actual figure rather than an average that can be several percent out.
• Cut and served to length: For substation work we cut to the drawing length and serve or weld both ends, so the site team is not cutting a two kilometre reel into eighteen metre pieces on the ground.

The main uses are substation guy sets, transmission tower anchor guys, and heavy static tensioning on industrial structures. It is also used as a catenary support strand and as an anchorage element for safety netting on large construction sites.

Because the section and strength are standardised, it is also the strand buyers pick when a project specification lists GJ grades by name and the inspector will check the marking against the drawing before accepting delivery.

• Substation guy sets and anchor systems
• Transmission tower guys and anchor rods
• Heavy static tensioning on industrial structures
• Catenary support strand for services
• Safety net anchorage on construction sites

Each lot is sampled for breaking load, elongation and zinc mass, and the certificate is issued against the reel number. Marking is applied to the reel and, on request, to a stainless tag wired to the strand end so the inspector can identify the item after delivery.

Diameter, area and lay length are measured at three points per reel. We also inspect for broken wires and for exposed steel at wire crossover, which is where a galvanizing line that is running slightly cool leaves thin spots.

Wooden or iron reels of 500m to 2000m, or cut lengths coiled and strapped for substation work. Reels are marked with designation, area, length, breaking load and lot number, and the packing list matches reel numbers to the test certificates.