Solar End Clamp with U Bolt

Product Description:

Our solar end clamp with U-bolt is designed to secure the outer edge of a solar panel to a compatible U steel rail or RHS purlins. The U-bolt connection provides a firm, reliable attachment. Dimensions and materials can be customized to suit your mounting system and project requirements.

On a carport canopy or ground mount, the failure after last typhoon season was not in the middle of the array. The U bolt mid clamps had held the paired frames down across every interior bay. What moved was the edge: the first and last module in each row, where the clamp had nothing to press against but a single frame, had begun to slide sideways and lift at the corner. Arrays fail from their boundaries — and the boundary is a different part.

That part is the solar end clamp with U bolt. Where the mid clamp presses two adjacent frames together, the end clamp grips a single outer frame against the purlin while a hot-dip galvanized U bolt wraps the U-steel or square tube section beneath it, closing the load path at the row ends.

Why a Solar End Clamp with U Bolt Is the Boundary of the Structure, Not an Afterthought

Row ends see the worst of the wind, so they need their own fixing. Wind suction over a PV array is not uniform — the perimeter and corner zones of a roof or ground field attract the highest uplift pressures in every major load standard, and the outermost module is where those pressures land. An end clamp is not a trimmed-down mid clamp; it is the fixing that carries the boundary case.

One frame, one torque cycle, one locked connection. The clamp wing engages the single outer frame, the backing plate seats under the purlin, and the U bolt wraps the steel section. Tightening the two nuts evenly secures the frame, the clamp and the purlin as one assembly — no rail bolt, no intermediate joint, nothing left for the wind to work loose.

It pairs with the U bolt mid clamp to complete the array. Both parts share the same U bolt family, the same purlin fitment and the same frame-height range, so a row is specified as one kit: end clamps at the boundaries, mid clamps between. See the companion article on the solar mid clamp with U bolt for the interior-bay case — the two URLs are designed to be read together.

No drilling and no welding on site. The alternative at row ends is usually a through-bolt into the purlin or a welded tab. Drilling breaks the coating at the hole edge and welding destroys it across a heat-affected zone; both invite rust exactly where the structural demand is highest. The U bolt clamps from outside the section and leaves the galvanizing intact.

Lateral restraint where the array can drift. The outer frame has no neighbouring frame to key against, so sideways movement and misalignment start at the boundary. The end clamp’s wing profile and the wrapped U shape hold the frame square against the purlin, keeping row spacing true across the whole array.

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