Suspending heavy lighting

At a glance

A coordination list, not a rating. No loads, anchors or sizes are given: the structural engineer chooses the fixing.

Fixing questions by ceiling type

The rule is simple: a heavy fitting must be carried by the structure, never by the finish. The structural engineer chooses the fixing for your ceiling and the declared weight. This sheet gives the questions, not the answers. It gives no loads, anchor types or sizes for any ceiling, because they depend on the fitting, the construction and the engineer’s design.

The drawing shows the five usual constructions and which can offer a structural fixing. In every case, someone must find out what is above the ceiling before the fixing is designed, by opening up, by looking at the drawings or by surveying. A fixing that looks sound from below can be fixed to nothing.

The table adds who normally decides. It is a coordination list. Do not read an entry as a rating.

Chains, cables, canopies and a secondary line

Primary and secondary suspension. The primary suspension is the chain, rod or cable that carries the fitting day to day. A secondary line is a second, independent connection to a separate fixing, usually slack, that is there to hold the fitting if the primary path fails. Whether to use one, what it is made of and where it fixes are for the structural engineer and the partner workshop to agree and record. A secondary line is not a substitute for a proper primary fixing, and it must not share a weak link with the primary line.

Weakest link. Every part between the fitting and the structure carries the whole load: the connection to the frame, each chain link or cable end, any shackle, turnbuckle or swivel, the canopy hook or plate, and the fixing. The partner workshop should declare a rating for each part it supplies and the basis for it. Do not rely on a part with no declared rating, and do not mix parts from different sources without the engineer’s approval.

Chains, rods and cables. Chain, rod or cable is chosen for strength, finish, durability and appearance. Check the rating, the corrosion resistance for the room (a pool hall or a coastal building is not a dry lobby), wear at moving joints, and how the length is adjusted at installation. Adjustment must not weaken the part or the fixing.

The canopy. The canopy hides the fixing and wiring. On a heavy fitting it should not be the thing that carries the load unless the partner workshop and the engineer say it is. A decorative ceiling rose is not a structural fixing for a heavy piece: an IET summary of BS 7671:2008, regulation 559.6.1.5, says a fixing for a pendant luminaire must carry not less than 5 kg and that for a heavier luminaire the installer must ensure the fixing is capable of supporting it. See chandelier weights and ceiling loads.

The electrical supply. The cable that powers the fitting is not its support. Keep the electrical connection slack, protected and separate from the load path. Earthing of a metal fitting and its protection class are covered in luminaire protection classes and earthing.

What is tested, and the site check

What the luminaire standard tests. BS EN IEC 60598-1 tests the strength of a luminaire’s suspension, and IECEE decision sheets show the test uses a load that is a multiple of the luminaire’s weight. We did not read the standard and give no factor. The test is about the luminaire, not the building. A fitting that passes it has a suspension that is strong enough for the fitting; it does not show that the fixing in your ceiling is.

Checks on site. The usual approach is to inspect and record each fixing before the fitting is hung and before the ceiling is closed, and to hang the fitting only when the engineer’s approval is in hand. Whether any proof load test is carried out, at what value, and by whom, is a matter for the engineer and the installer. We do not give a test load, because it is not ours to set. Photograph each fixing before the ceiling is closed, and keep the record.

Sign-off. The sign-off form (below) is a record of who checked what. It is not a certificate of safety, and it does not replace the engineer’s approval.

A sign-off record

Use a record like this, adapted by your engineer and installer. Complete it as the work is done, not afterwards.

1. Fitting [tag], declared weight [value, from the shop drawing ref], suspension components and their declared ratings recorded.
2. Ceiling construction at [location] confirmed by [method: survey / opening up / drawings], and the structure to which the load is fixed identified.
3. Fixing designed and approved by [structural engineer], ref [ref], dated [date].
4. Fixing installed by [installer] to that design; each fixing inspected and photographed before the ceiling was closed.
5. Secondary suspension, if any, fixed to a separate fixing as designed; electrical connection separate and slack.
6. Fitting hung by [installer], following the method statement; any proof test as the engineer directed recorded here [result or “none required by the engineer”].
7. Records filed in the O&M information; the next inspection date set by [operator].

Fitting [tag] is to be suspended from the building structure only, by a fixing designed and approved by [structural engineer] against the declared weight and the construction of [ceiling type] at [location]. No load is to be carried by plasterboard, plaster, a ceiling rose or a suspended ceiling grid unless the engineer has approved that arrangement in writing. [Approval ref.]

The supplier is to declare the rating of every part between the fitting and the structure, including chain, rod or cable, connectors, canopy hook or plate and any adjuster, and the basis of each rating [test / calculation / manufacturer’s declaration]. No part without a declared rating is to be used, and no part is to be substituted without [designer] and the structural engineer’s approval.

[A secondary suspension is / No secondary suspension is] to be provided for fitting [tag], as determined by [structural engineer]. Where provided, it is to be independent of the primary suspension, fixed to a separate fixing, and shown on the shop drawing [ref].

Each fixing is to be inspected and photographed before the ceiling is closed. The fitting is not to be hung until [structural engineer’s] approval and the supplier’s declared weight and ratings are on file. Any test load is to be as directed by the engineer and recorded. Completed records are to be included in the O&M information.

Standards and sources

• BS 7671:2018+A4:2026 Requirements for electrical installations: status from search summaries (published 15 Apr 2026); text not read. Regulation 559.6.1.5 read in an IET summary of the 2008 edition.
• BS EN IEC 60598-1 Luminaires, general requirements and tests: paywalled; text not read; confirm the edition and the suspension clause.
• Building Regulations 2010, Schedule 1, A1 Loading: read 7 Nov 2026.
• Work at Height Regulations 2005, reg 6: read 7 Nov 2026.

Questions we are asked

Can I hang a heavy chandelier from a ceiling rose?

Not as the load path. An IET summary of the 2008 wiring regulations says the fixing for a pendant must carry at least 5 kg and that for a heavier luminaire the installer must ensure the fixing can support it. A heavy decorative piece needs a structural fixing designed by an engineer.

Can a chandelier hang from plasterboard?

No, not as the load path for a heavy fitting. The load must reach the structure above, with a fixing designed and approved by a structural engineer.

What is a secondary suspension?

A second, independent connection to a separate fixing, usually slack, that holds the fitting if the primary suspension fails. Whether to use one and how is for the engineer and the partner workshop.

What safe working load should I specify for the chain?

Do not specify one yourself. Ask the partner workshop to declare the rating of every component and the basis for it, and give those to the engineer, who designs the fixing.

Does a luminaire that passes BS EN IEC 60598-1 mean the ceiling is safe?

No. The standard tests the luminaire and its suspension. Whether your ceiling can carry the fitting is a structural question.

Do I need to load-test the fixing?

That is for the structural engineer and installer to decide for your fitting and fixing, including any test value. We do not give one. Whatever is done, record it.