Riser

A riser is a stage deck used on its own rather than as part of a main stage. Standard uses are a drum riser, a camera platform, a choir or band level, a podium riser that lifts a short speaker to the microphone, and a press riser at the back of a room.

The reason it is called out separately is that each use carries different requirements, and they are easy to get wrong by treating a riser as generic staging. A drum riser wants to be isolated so it does not transmit into the deck. A camera riser needs to be deep enough for a tripod, an operator and a step back, and it needs a clear line to the stage that nobody will stand in front of. A choir riser is a tiered unit with its own guard requirements, not a flat deck.

The common failure is the press riser. It is the last thing added, usually at the back, and the position is set by what is left over — which puts cameras behind a chandelier, or at a height where the lens is looking at the backs of heads rather than at the stage.

Risers also decide what the room seats, because every one of them removes floor. A twelve-by-eight camera platform is four tables.

Staging and rigging — owned inventory, our own crew, and a site survey before anything is specified.

• Stage deck The modular platform a stage is built from — four feet by eight in most of the country, with the height set by the legs rather than by the deck.
• Sightlines What each seat can actually see — the thing that decides stage height, screen height and where a camera platform may stand, and the thing a flat floor ruins.
• Guardrail The barrier along an open edge — required by code above thirty inches, built at forty-two inches high, and carrying an exception for performance areas that is routinely misread as a blanket one.