Overview
The 35lb Sandbag is a counterweight filled with sand and is part of the basic equipment of any grip department on a film and television set. With a nominal 35 US pounds (around 15.9 kg), it is the heaviest of the common standard sizes, which typically range from 5 lb to 15 lb, 25 lb, and up to 35 lb. Its purpose is to secure tripods, C-stands, light stands, booms, frames (flags, floppies, frames), and rigging setups against tipping over and wind load.
Characteristic is the saddlebag design: two sand-filled chambers ("wings") are connected by a central carrying handle, allowing the bag to be placed like a saddle over the leg of a stand, over a knuckle, or over a crossbar. This distributes the weight on both sides and prevents the bag from slipping off.
Construction and Material
High-quality sandbags are made of durable, weather-resistant Cordura nylon (usually Cordura 1000D) with reinforced, multi-stitched seams and a robust carrying handle. Inside is the actual filling material, often in an additional plastic inner bag to prevent sand from escaping.
- Design: Saddlebag (two chambers, central handle)
- Outer Material: Cordura nylon (e.g., 1000D), water-repellent
- Filling: typically cleaned quartz/silica sand; alternatively gravel or steel shot
- Nominal Weight: 35 lb (≈ 15.9 kg) when filled
Sandbags are available for purchase pre-filled or empty. Teams fill empty bags themselves and sew or seal the filling opening; some models (e.g., with Velcro or double closure) can be transported empty for shipping and filled on location.
Use on Set
The 35lb Sandbag is primarily a safety tool. It is hung over the loaded (rear) leg of a C-stand or over the legs of a light stand to lower the center of gravity as soon as an arm extends sideways or a heavy load (light, flag, reflector) is mounted. Basic rule: the further a weight extends, the more sandbags should be placed at the base.
- Ballasting of C-stands, light stands, and combo stands
- Securing booms (arms) and overhanging setups
- Ballast for frames, butterflies/overheads, and greenscreen frames
- Fixing tripods, dollies, and loose setups against wind and kicks
Due to its weight, the 35lb bag is almost never carried on set, but rather held by the handle and transported hanging or placed directly over the tripod leg – this protects the back and corresponds to common handling practice.