What are Baby and Jr. C-Clamps?
Baby and Jr. C-Clamps are heavy-duty rigging tools used by grips and lighting technicians. They are essentially specialized industrial C-clamps modified for film production. Unlike a standard hardware store clamp, these versions feature built-in mounting points for lighting fixtures. They allow crews to mount lights and modifiers in places where a traditional light stand cannot fit. This makes them indispensable for “rigging from the air” or mounting equipment to architectural features of a location.
Understanding the Differences
The names “Baby” and “Junior” refer to the size of the mounting hardware on the clamp, which matches the standard sizes used in the film industry.
| Baby C-Clamps | These features include a 5/8-inch (16mm) pin. This is the standard mounting size for most small to medium-sized lighting fixtures, such as small LEDs, Fresnels, or flags. |
| Junior C-Clamps | These feature a 1-1/8-inch (28mm) receiver (often called a “Junior Receiver”). This larger mounting point supports heavy-duty lighting fixtures, such as large HMIs or heavy LED panels. |
Versatile Mounting Options
These clamps can secure equipment to a wide variety of surfaces. Grips frequently use them to clamp onto wooden beams, steel rafters, or architectural ledges. Most professional C-clamps also feature a “V-groove” or channel on the pressure plate. This specific design allows the clamp to grip safely onto round metal or aluminum pipes without slipping. This makes them ideal for rigging lights to a permanent pipe grid in a studio or a temporary truss on location.
Best Practices for Location Safety
While these clamps are incredibly strong, they can easily damage surfaces if used incorrectly. Every grip must follow a few essential safety protocols when using C-clamps.
Use Cribbing
When you clamp onto wood, drywall, or finished surfaces, you must use cribbing. This usually consists of small pieces of 1×3 or 2×4 lumber placed between the clamp and the surface. The wood acts as a buffer. It spreads the pressure and prevents the metal teeth of the clamp from denting or scarring the location.
Safety Chains
Any light rigged with a C-clamp is technically an overhead hazard. Therefore, you must always use a safety chain or cable. You wrap the cable around the beam or pipe and secure it to the light fixture. If the clamp were to fail or loosen, the safety chain prevents the equipment from falling onto the cast or crew.
Don’t Over-Tighten
Because these clamps use a screw mechanism, they can exert massive force. Over-tightening can crush pipes or crack wooden beams. You should tighten the clamp until it is secure, but avoid using excessive force that could compromise the integrity of the surface you are rigging to.
