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Solar frame pilots

Solar frame pilots make it easier for South African teams to brief contractors or on-site crews, cutting down on unexpected issues. We share first-hand lessons from our own shop floor, covering plate preparation, kerf habits, and mounting steps that keep jobs moving smoothly.

Mr Pieter van Wyk · Metrology

Site checks before cutting pilots

Before we run any solar frame pilot job, our team double-checks site constraints with the client. For example, on a Joburg industrial roof, we learned late that the mounting points had to avoid existing cable trays. By confirming this before cutting, we adjusted the hole pattern to suit the real layout and avoided a costly rework.

Another tip from the floor: always measure the access points yourself, not just from plans. One crew arrived with pilots that fit the spec on paper, but could not fit through a narrow rooftop hatch. Now, we ask for a quick phone photo or a measurement from the actual site, which saves time and keeps the job on track.

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Workshop context

Plate and kerf habits for mounting pilots.

What solar frame pilots are, and who uses them

Solar frame pilots are the starter plates, punched or cut with mounting positions, that teams use to align and fasten solar structures on roofs, yards, or industrial racks. Our cut pilots show up on the floor when a workshop needs to turn digital layouts or sketches into a handoff part for the next crew, usually an installer, contractor, or in-house team. You see this most in George, Gqeberha, Pretoria, and smaller Gauteng towns feeding solar upgrades. These pilots suit operations that want tidy, consistent mounting points and no wasted time on ad hoc drilling. They are less suited for projects where every site or panel uses a different frame or offset, or where the contractor prefers to mark and drill in situ.

How pilot cutting works in South African workshops

Most requests start with a drawing or a call about spacing and plate size. We look for constraints: does the crew need to hand-carry the frame onto a tile roof in morning mist, or will everything be craned up in a warehouse yard? Is the site in the Highveld’s dry dust, or is it facing coastal humidity in Durban? Those details shape both the material choice (aluminium, mild steel, galvanised plate) and the kerf value, which affects fit-ups. Our cut path makes sure mounting holes nest cleanly and that all pilot plates land square with minimal bench rework. The pilots leave our Germiston bay with a short note on the cutting order and habitual marks for easy handover.

A typical worked example: Gqeberha solar install

A crew in Gqeberha needed fifty pilot plates for commercial solar racks. The process began with a one-page drawing showing the panel spacing and hole pattern. We asked about roof access, finish (bare aluminium or powder coat), and bolt clearance, since site access was by ladder through a narrow stairwell. Once the constraint was set, plates must fit through a 600 mm opening and weigh under four kilos each, we selected a machines path that kept burrs low and all holes round. The pilots shipped with a marking key and an install note. The contractor handed these straight to their team without a second site visit or extra drilling.

What to prepare before you email

A smooth project handoff relies on solid, organised notes. We always ask clients to gather the main details upfront, which lets us quote and cut accurately from the start. Sending everything together also helps avoid delays from shifting municipal approvals or unexpected power cuts. For practical tips on nesting and workflow, see Nesting before you cut and Machines.

A drawing or marked-up photo showing hole locations and overall plate size

Details on plate material, thickness, and if a finish is required

Notes on site access (stairwells, cranes, ladders, or rooftop)

Any critical measurements for clearance or weight

Who signs off and the expected install date (even if soft)

Any special marks, numbering, or pilot hole sizes preferred

Common pitfalls and how we prevent them

Skipping the constraint step leads to the wrong plate size, holes that fight your fasteners, or pilots that are too heavy to get onsite. Sometimes teams leave off key details, expecting to fill in later, this risks a re-cut at your cost or a delivery day lost to emails. We avoid these problems by stopping to check constraints before choosing a finish, machine, or path. Our team sees fewer second visits and rush fees by checking the sign-off and process plan in advance. If you are new to pilot plates, our resources page explains common terms, and we reply to practical emails about solar frame pilots from Isando most weeks.