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Frequently Asked Questions

How much better is a ring shank at resisting pull-out?

Substantially - it is the difference between friction on a smooth shank and shearing fibres off every ring.

Driving forces fibres over each ring, and they spring back into the grooves behind.

Withdrawal then has to shear all of that engaged fibre rather than slide past it.

The improvement is large rather than marginal, which is why sheathing and subfloor specifications call for them.

Shear capacity is broadly similar to a plain nail of the same diameter, so nothing is lost.

The trade is entirely in removal rather than in performance.

Where are ring shanks specified?

Anywhere a sheet is trying to lift off a frame - sheathing, subfloors, decking, cladding, pallets and packaging.

Roof and wall sheathing sees uplift and racking loads that work plain nails loose.

Subfloors flex underfoot continuously, and a plain nail eventually backs out and squeaks.

Pallets and crates are handled repeatedly and rely on withdrawal resistance at every joint.

External cladding moves with moisture and temperature and needs a fixing that does not creep.

In each case the load is along the nail rather than across it, which is a plain nail's weakest direction.

Can they be removed?

With great difficulty, and usually by destroying the timber around them.

The rings resist withdrawal by design, and that resistance does not diminish.

Levering a ring shank nail typically tears out a plug of timber or breaks the board.

In practice boards fixed with ring shanks are cut or broken out rather than lifted.

Cutting the nail between the members with a reciprocating saw blade is often the cleanest route.

Where a joint may need to come apart, a screw gives similar withdrawal resistance and removes cleanly.

What happens if a ring shank nail is overdriven?

It cannot be pulled back, and the head crushes into the sheet - which on thin panels means it has punched through and holds nothing.

The rings resist movement in both directions, so there is no correcting an overdriven nail.

A head sunk below the sheet surface has lost the bearing area it depends on.

On thin sheathing that is a fixing which looks driven and carries almost no load.

Nail gun depth settings matter more here than with plain nails, and should be checked on a scrap piece.

Overdriven fixings are usually left in place and a new nail added nearby.

Do they split timber more than plain nails?

Slightly, in dry dense material - the rings displace more fibre as they pass.

The same rules apply: end distance, edge distance and staggering the pattern.

Dry timber splits far more readily than green or recently treated material.

Pre-drilling is rarely practical at the volumes ring shanks are used in, so position does the work instead.

Smaller diameters split less and are often adequate given the withdrawal advantage.

Near ends of boards, which is exactly where fixings are wanted, is the highest-risk position.

How do they compare with twisted shank nails?

Both resist withdrawal; rings do it by fibre engagement, twists by a helical path, and rings generally hold more in softwood.

A ring shank's fibres spring into discrete grooves, which is a very direct mechanical lock.

A twisted shank rotates as it drives and engages along a helix, which resists both withdrawal and rotation.

Twisted shanks tend to be tougher in dense or abrasive material and in harder substrates.

Ring shanks are more widely available and are what most sheathing specifications name.

Both are effectively permanent, so neither solves the removal problem.

Are they available for nail guns?

Yes, and most ring shank nails are now gun-driven in collated strips or coils.

Collation type and strip angle are tool-specific, so compatibility is checked against the tool rather than the nail.

Depth setting is the critical adjustment, for the overdriving reasons above.

Gun nails are often slightly smaller in diameter than hand-driven equivalents, which the specification may or may not allow.

Coil nailers handle the high volumes that sheathing and pallet work involve.

Where a specification names a nail diameter and shank type, the collated product must meet it rather than merely resemble it.