Shields Precision Corner Offset (PCO-1) 90-degree corner location survey jig with ASA frame and 6061-T6 aluminum corner plates.

Precision Corner Offset (PCO) — 90° Corner Location Jig for Land Surveying

$214.99
Sale price  $214.99 Regular price 
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Shields Precision Corner Offset (PCO-1) 90-degree corner location survey jig with ASA frame and 6061-T6 aluminum corner plates.

Precision Corner Offset (PCO) — 90° Corner Location Jig for Land Surveying

$214.99
Sale price  $214.99 Regular price 

Locate any 90° corner that needs surveying — building corners, structural tie-in points, masonry walls, foundations, bridges, and piles — from a fixed, repeatable offset.

If a crew can't get a clean shot on a corner, the Precision Corner Offset gives them an accurate, repeatable position and angle from a known offset. It was born on a job locating thousands of batter and plumb piles, where Dan Shields built two metal prototypes to do it at a 3″×3″ offset. This is the production version — refined, lighter, and now with selectable offsets — and the same method works on homes, garages, shops, bridges, and heavy-civil structures alike.

Attach your mini-prism to the top of the ribbed grab handle, seat the corner in the machined 90° aluminum pocket, and store the point. Because the offset is a known, machined geometry, the true corner position and angle back out cleanly — every time, across every crew.

Why crews use it

  • Locates any surveyed 90° corner — buildings, structures, walls, foundations, bridges, and piles — from one repeatable setup: position, plumbness, and batter angle.
  • Selectable 1″×1″, 2″×2″, or 3″×3″ offset to clear obstructions or match your workflow.
  • High-strength ASA frame and ribbed grab handle; 6061-T6 aluminum corner plates that hold their geometry in the field.
  • Your standard mini-prism mounts right on top — 5/8-11 thread, no proprietary target required.
  • Engineered and manufactured in the USA, engineer-direct.

Specifications

  • Frame & grab handle: high-strength ASA plastic
  • Corner plates (90° pocket): 6061-T6 aluminum
  • Fasteners: 18-8 stainless steel
  • Selectable offset: 1″×1″, 2″×2″, 3″×3″
  • Prism mount: 5/8-11 thread
  • Overall size: approx. 8.4″ × 7.0″ × 5.0″

Made in the USA of American materials. Approx. 2-week lead time. Free shipping.

Prism not included.

Coming soon: an inside-corner model that reads inside corners as cleanly as this one reads outside corners.


Technical Resources

Download the full specs and documentation:

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