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In the U.S. and Canada, grips are lighting and rigging technicians in the film and video industries. They make up their own department on a film set and are led by a key grip. Grips have two main functions. The first is to work closely with the camera department, especially if the camera is mounted to a dolly, crane or other unusual position. Some grips may specialize in operating camera dollies or camera cranes. The second is to work closely with the electrical department to put in the lighting set-ups necessary for a shot.

In the U.K., Australia and most parts of Europe, grips are not involved in lighting. In the "British System", adopted throughout Europe and the British Commonwealth (excluding Canada), a grip is solely responsible for camera mounting and support.

The term 'grip' dates back to the early era of the circus. From there it was used in vaudeville and then in today's film sound stages and sets. Some have suggested the name comes from the 1930s-40s slang term for a tool bag or "grip" that these technicians use to carry their tools to work. Another popular theory states that in the days of hand-cranked cameras, it would be necessary for a few burly men to hang on to the tripod legs to stop excessive movement of the camera. These men became known as the 'good grips'- as they were constantly being instructed to 'keep a good grip on the tripod'.

U.S. grips may belong to the International Alliance of Theatrical Stage Employes. Canadian grips may also belong to IATSE or to Canada's other professional trade unions including Toronto's Nabet 700, or Vancouver's ACFC. British grips usually belong to BECTU (Broadcasting Entertainment Cinematograph & Theatre Union).

Lighting

On all union jobs, grips do not touch the lights themselves. The placement of lighting instruments and the power distribution to deliver electricity is handled by the electricians who work under a gaffer. Grips do, however, handle all of the equipment not directly attached to the lights that diffuse and shape the light. This work is done by setting stands that hold flags, nets, diffusion frames or other gobos in place in front of a lighting instrument to shape the beam of light. This is called "cutting light" and is where much of the art of lighting is achieved.

Grips also set "passive fill" which is a term for the reflected light that is "bounced" back onto a subject on the fill or non key light side. The first choice for most film-makers' fill is a product known in the US as beadboard and called "poly", short for polystyrene, in Europe. It is actually rigid insulation made for the construction trade, but was adopted to the film trade because of its "true-white" color and "soft" bounce.

Grips may also be called on to set "negative fill", which is the cutting of ambient or non-directional light to raise contrast on the subject. This is achieved by setting "solids" made of black fabric, either flags (up to 4'x4') or rags (6'x6' or larger) on the non key light side or wherever the negative fill is desired.

When shooting day exteriors, grips perform similar functions, but with the sun as the light source. Grips use overhead frames up to 20'x20' or larger for the shaping or filtering of sunlight. The lighting set-ups for these exterior shots can become quite extensive, with the use of boom lifts common. Lifts are especially useful at night when they are rigged to raise lights high in the air to create moon-effect lighting.

Rigging

Grips also satisfy rigging needs on set. Simple rigs can be menace arms that offset lighting instruments to reach over set walls or goalposts that span the set to rig over actors and crew. More advanced rigs can include working with pulleys, steel cable or trusses. Grips are also called on to rig picture cars on process trailers and placing camera and lights all around the vehicle to achieve driving shots. This often includes the use of hood mounts, side mounts, suction cup mounts and other proprietary clamps to attach film equipment to vehicles.

Grips are also called on for "blackouts" and "tenting-out" windows and doors. When shooting interiors day-for-night on location, grips need to cut all the daylight entering onto set. If the scene is "blocked" or staged away from windows or other openings to the outside, the light may be simply blacked out with cloth or plastic sheeting. However when windows or doors are seen from camera, these openings must be tented to allow some exterior dressing to be seen. In some cases windows must be tented to allow a light, usually a tungsten source, to be placed just outside to create a needed effect.

Safety

Grips are also responsible for safety on the set as it relates to the force of gravity. Insofar as stands, ladders, scaffolds, and overhead rigs are properly installed, grips are charged with making them safe because the other crew members will invariably have to climb on, walk around, or otherwise negotiate the different grip set-ups. As regards legal statute, the key grip may even be held liable for injuries that happen on set, especially if the injury is the cause of something falling down onto somebody.

Tools

A grip's job is a craft that is a cross between that of a mechanic and that of a construction worker. As in those vocations, grips need hand tools at the ready and most carry the following items: a walkie-talkie, a razor knife, an eight-inch adjustable wrench, a 25-foot tape measure, a 3/16" hex speed-wrench, a multitool, a small flashlight, a permanent ink marker, and work gloves. Additionally, a grip might also carry a torpedo level, spring clamps and a roll of 2" black paper tape and or Gaffers Tape on his or her belt.

Types of Grips

• key grip or grip boss—the foreman of the grip department
• best boy grip or second company grip—assists the key grip in logistical issues, such as scheduling crew and equipment rental
• 3rd grip, company grip or gang grip—the grips who work the set and take direction from the key
• construction grip—Constructs and dismantles the set. On the sound stage, construction grips are responsible for building, moving, and adjusting major set pieces (e.g. walls, ceiling flats) when something needs to be moved to get a camera or lights into position.
• dolly grip—operates the dollies
• crane operator—operates the camera crane

• Articles lacking sources from October 2006
• Film crew