Strapping cable drums and reels: closures, flange edges and safe release

A cable drum looks like a simple load: two flanges, a barrel and a known gross mass. In transport it is anything but. It wants to roll, its flanges present hard edges to anything wrapped around them, and the cable it carries is usually worth far more than its packaging. Strap does several different jobs on a drum, and each job needs its own specification.

Four places strap is used on drums and reels

Most drum packing combines some of the following:

1. Battens or lagging across the flanges. Timber battens fixed across the flange rims protect the outer layers of cable. Steel strap with seals is a common way of holding them.
2. Fixing a drum to a pallet or skid. Small and medium reels are often strapped down to a pallet, with strap passing through the arbour hole or around the barrel and under the pallet deck.
3. Unitising small reels. Several reels of wire or small cable can be stacked on one pallet and strapped together as a single handling unit.
4. Closing protective wrap or covers. Film, sheeting or board over the reel face may be retained with a light strap.

These are different loads with different failure modes. A buyer who orders “strap for drums” without saying which of the four applies leaves the supplier guessing.

Strap holds the unit together; it does not secure the drum in the vehicle

The IMO/ILO/UNECE CTU Code is clear on the hierarchy. Its annex on packing and securing describes bundling, strapping and wrapping as auxiliary measures that should always be combined with direct securing or friction securing. For a drum, securing in the transport unit usually means chocks, cradles or blocking against rolling, plus lashings designed for the mass. The strap on the drum is no substitute for that. The code itself is non-mandatory, as the IMO’s overview explains, but it is written for everyone in the chain, from those who pack and secure cargo to those who receive and unpack it.

This distinction helps when an enquiry asks for a “stronger” buckle or seal. If the real problem is a drum shifting inside a container, a heavier closure on the battens will not solve it.

Flange edges and pallet decks

Strap that crosses a flange rim or a pallet edge bears on a hard corner. The CTU Code notes that the maximum securing load values it quotes for lashing materials assume smooth or smoothed edges, and that sharp edges and corners substantially reduce them; it recommends edge protectors wherever practicable. The same logic applies to strap on a drum: protect the contact point, or expect damage exactly where the strap is most stressed.

Pallets need attention too. HSE’s warehousing guidance, HSG76, warns that strapping loads down to pallets can pull deck boards away from the bearers. A heavy reel strapped hard to a light pallet may arrive with the reel intact and the pallet broken, which then becomes a handling hazard at the receiving end.

What to put in the specification

Item	Why it matters
Flange diameter, overall width, barrel and arbour hole diameter	Determines strap length, routing and whether strap can pass through the centre
Gross mass of the loaded drum	Sets the scale of the strap, closure and pallet discussion
Which of the four applications applies	Each has a different load path
Strap material, nominal width and thickness	Steel, woven polyester and PET strap use different closures and tools
Closure type and tool	Seal profile and sealer, or buckle and tensioner, must suit the strap
Exposure and storage	Outdoor storage, humidity and route length frame finish choices such as galvanized or phosphated
Receiving method	Forklift, crane or rolling, and who removes the strap

For steel strap on battens, the seal has to suit the strap width, the strap thickness and the sealer. Our article on steel strapping seal compatibility lists the questions to settle. For woven strap with buckles, the strap construction, buckle wire diameter and tensioner belong in the same review, because wire diameter alone is not a load rating.

Releasing the strap safely

Drum strapping is often removed by people who did not apply it: site electricians, cable-pulling crews, a distributor’s yard team. A few points belong in the packing instruction and, where practical, on the drum label:

• Check that the drum is chocked or cradled before any strap is cut. HSG76 advises checking the vehicle and load before loosening load-bearing straps, so that nothing can fall.
• Stand to the side of a tensioned strap when cutting it, and control the free end where possible.
• Collect cut strap straight away. HSG76 lists banded strapping loops among common trip hazards in warehouses.
• Do not use battens or strap as lifting points unless they were designed for that purpose.

Reels in mixed loads

When reels share a container with other cargo, the CTU Code lists reels among the packages normally packed in a tight stowage arrangement. That only works if each reel is stable on its own base, which brings the conversation back to pallets, chocks and the drum-to-pallet strap. When the unpacking side of the code is followed, every package is recorded as it is removed, so a clear drum label with cable reference and drum number saves time at both ends.

Closures for drum and reel strapping

YAKU supplies steel strapping seals, galvanized and phosphated wire buckles, and woven strap on request. Send the drum dimensions, gross mass, strap and tool through our enquiry page, and say which of the four applications you are specifying. Strength values for any combination are on request.