Sling & Quickdraw Retirement Calculator

Based on UIAA Standard 104 guidelines for sling age, usage, and damage.

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For reference only. UIAA 104 maximum guidelines. Textile equipment degrades without visible signs. Retire immediately if any damage is present.

UIAA maximum sling age

UsageNylonDyneema
Never used10 yrs8 yrs
Rarely (few times/yr)7 yrs5 yrs
Monthly5 yrs3 yrs
Weekly3 yrs1 yr
Daily1 yr1 yr
Dyneema/Spectra slings show less visible wear before failure. When in doubt, retire it — slings are inexpensive compared to the risk.

Source: UIAA Standard 104 — Sling Inspection & Retirement

Also useful: Check rope retirement → · Check carabiner retirement →

Sling safety explained

UIAA Standard 104 — Slings

UIAA Standard 104 (and EN 566) defines minimum strength, elongation, and marking requirements for textile slings used in climbing. All slings sold for climbing must meet these standards and bear CE marking.

Minimum strength requirements

  • Loop strength — minimum 22 kN for a sewn sling tested as a loop
  • Single strand — minimum 12 kN per strand

Sling types covered

  • Sewn slings — factory-sewn loops of flat or tubular webbing (most common)
  • Tied slings — webbing tied with a water knot; reduce rated strength by 30–40%
  • Quickdraws — two carabiners connected by a short sewn sling
  • Alpine draws — long sling doubled through a carabiner for route-specific extension

A sling's rated strength assumes proper loading on the major axis. Cross-loading, choker configurations, or loading the stitching area directly all reduce effective strength significantly.

Frequently asked questions

When should I retire a climbing sling?

Retire a sling immediately if it has any visible damage (cuts, fraying, discolouration, stiffness, or glazing from heat), after any severe shock load, or when it exceeds UIAA maximum age: Nylon — 1 year daily, 3 weekly, 5 monthly, 7 rarely, 10 never used. Dyneema — 2 years shorter at each level, minimum 1 year.

How long do Dyneema slings last?

UIAA 104 guidelines recommend shorter service lives for Dyneema/Spectra slings than for nylon at equivalent usage levels: daily or weekly use — 1 year; monthly use — 3 years; occasional use — 5 years; rarely used — 5 years; never used — 8 years. Dyneema degrades under UV and heat without visible signs, making inspection less reliable than with nylon.

Can I inspect a Dyneema sling the same way as nylon?

Not reliably. Dyneema fibres show less visible fraying before failure than nylon. A Dyneema sling can look pristine while having lost significant strength from UV exposure. This is why UIAA recommends shorter maximum service lives for Dyneema. In addition to visual inspection, follow age guidelines strictly for Dyneema slings.

What is the difference between a sling and a quickdraw?

A quickdraw consists of two carabiners connected by a short, usually rigid sewn sling (typically 10–12cm). A sling is a longer loop of webbing (typically 60cm or 120cm) used for building anchors, extending protection, or threading through natural features. Both use the same webbing materials and follow the same UIAA 104 retirement guidelines.

Can a nylon sling be used as a belay loop?

No. Slings are not designed to be used as harness belay loops. The belay loop on a harness is a specific load-bearing component tested to UIAA 105 standards as part of the harness system. Using a sling in this role creates a cross-loading or gate alignment risk. Always use a sling in its designed configuration — looped through protection or as an anchor component.

What does "shock loaded" mean for a sling?

A shock load occurs when a sling transitions from slack to taut under a dynamic falling load. Peak forces can be several times the static weight of the load, lasting only milliseconds. A shock load (from a fall where the sling is load-bearing) may internally damage fibres that are not visible from outside. Retire any sling that has held a real fall directly.