This is the inspection people call “the annual”, and it is the only one in
this section you do not carry out yourself.
Who does it
Sakkyndig kontroll is carried out by an independent certified body — not by
the operator, not by the employer, and not by the workshop that did the
maintenance. The independence is the entire point.
What the regulations say
Chapter 13 of the regulations on the performance of work governs this. Cranes
and lifting gear are covered by the requirement, the regulation states when
inspection falls due, a separate inspection is required in connection with
assembly or erection — which applies every time a tower crane goes up — and the
inspection must be documented.
The specific provisions, with links to Lovdata, are under
regulations. Read the text there rather than
trusting anyone’s memory, including mine.
What it means for you as operator
You do not perform the inspection, but you still have a job here:
- Know when the crane was last inspected, and that the documentation exists
- Know that the gear you use is covered too — slings, shackles and beams have
their own inspection regimes - Report findings so they are known before the inspection rather than
discovered during it - A valid inspection is not a guarantee that the crane is sound today. It
says it was sound on the day it was inspected
Assembly and erection
Tower cranes are inspected in connection with assembly or erection. That is a
separate inspection, not the same as the periodic one. See the
regulations and the article
Climbing the tower.
No thresholds here — by design. Discard criteria, torque values, lubricant types and intervals are specific to your machine and your equipment. They are in the manufacturer's documentation, on the equipment certificate, and in the report from sakkyndig kontroll. This page tells you what to look at and what a fault looks like — it does not tell you when something is condemned. If a check leaves you unsure, the equipment stays out of use until someone competent has seen it.