In short: A sandbag adds weight to a stand's foot so it stays down. The safe working load belongs to each stand, arm, clamp and grip head, as set by the maker, and a sandbag does not raise it. Check every rating before you rig, keep the load low, and have a competent person assess anything above head height.
A sandbag is one of the simplest pieces of safety kit on a set, and one of the most often used without thought. It keeps a stand on the floor, but it does not change what the stand, the arm or the clamp is rated to carry.
What the rating covers
- The stand: rated for the load on its head and arm, and it has to stay stable with that load at its full reach.
- The arm: rated for the weight hanging at its end, taking account of how far that weight sits from the stand.
- The clamp and grip head: rated for the item they hold, such as a light or a flag.
- The sandbag: adds stability at the base. It does not raise the rating of the head, the arm or the clamp.
Checks before you rig
- Read the rated load on the stand, the arm, the clamp and the head. Add the weight of what they carry, and keep the total under each rating.
- Keep the load over the base of the stand and as low as the shot allows.
- Place bags on the stand's legs or foot, not hung from the top of the stand.
- Check the surface. A bag on a loose floor, a raised platform or a stage that moves has no solid base.
- Route cables so they cannot pull the stand over.
- Move the bags with the stand. A stand that has been moved without its bags is no longer balanced.
Flown equipment and height
The HSE says work at height must be planned, supervised and carried out by competent people, and that the risks must be assessed before the work starts. On events, its guidance for flown lighting says the weight of the equipment should not exceed the safe working load of the securing points, and that suspended equipment should not rely on a single cable, clamp or bolt.
Sandbags on a stand are not the same job as rigging to a grid. Anything above head height, or anything hung from a grid, needs a competent person to assess it, and that assessment comes before the rigging starts.
A worked example
A soft light on a boom arm needs a bag on the stand's foot. The arm is rated for the light and its yoke, and the team places one bag on each leg, keeps the arm within its rating and ties the cable to the stand's leg so it cannot pull.
The team does not hang a bag from the arm to make up for a light that is too heavy for it. The fix is a heavier stand, or a different light.
Common mistakes
- Assuming that sandbags make any stand safe with any load.
- Hanging bags from an arm or a grip head to cover for an overloaded rig.
- Using wet or split bags, which spill and shift.
- Working alone on a boom or a high stand.
- Moving a stand without moving its bags, so the weight is no longer where it was placed.
Every space hire at Granary includes grip: C-stands, flags, bounce and apple boxes. For the kit itself, read the grip kit guide, the grip glossary and the pages on the key grip and dolly grip roles.
This is general guidance. A competent person must assess the actual rig, the kit and the location, and the HSE duties for work at height apply to the job.
Sources
- HSE, The law (working at height), read 5 November 2026
- HSE, Common work at height tasks at events, read 5 November 2026
Related guides
Questions we get asked
What is a safe working load?
The maximum load a piece of equipment is rated to carry in use, as set by its maker. Use it as the limit for that item, and check the rating on the item or in its manual.
Can I hang a sandbag from a stand's arm to add weight?
Not as a way of stabilising a stand: put bags on the legs instead. Weight hung from an arm adds load to the arm and its fittings and can make the stand less stable. Counterweights on the back of a boom arm are a separate matter, and follow the maker's instructions and a competent person's check.
Does a sandbag need a safe working load?
A sandbag is dead weight, so the question is what it sits on. The stand, its legs and the surface beneath all have to carry the total load.
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