Before anyone digs or cores, get a utility locate. In Ontario that’s Ontario One Call; every province has an equivalent. A slab can hide conduit, radiant heat or post-tension cables: scan it before coring.
Published fittings
| Product | Ground fitting | Rating |
|---|---|---|
| ännt RM150/C40-900 | Steel ground sleeve with anchor bars and base plate | ASTM F2656-20 C40 P1 |
| ännt RM275/K4-900 | Reinforced ground fitting 400 mm below grade, anchor bars 110 mm below that, 590 × 590 mm base plate | ASTM M30 (K4), PAS 68, IWA 14-1 |
| Gibraltar G-1631R | 8.5 in foundation | ASTM F3016-19 S30 P1 |
Getting it right
- Set the sleeve flush with the finished surface, so ploughs and wheels ride over it when the post is out.
- Give it drainage or a sealed cap: a sleeve that fills with water freezes solid, and the post won’t go back in until spring.
- For a rated removable, the sleeve is installed to the maker’s drawing; the rating covers the post and the fitting together.
- Plan where the posts live when they’re out, and who has the key.