auxiliary rafter
Above a principal rafter, a second principal rafter, occasionally used in a large queenpost truss.
Glossary
Glossary
Glossary
automatic load shedding
The automatic disconnection of a part of the electrical load in a building when there is an outage of the
Glossary
automatic operation
In an elevator: an operation whereby the starting of the elevator car is effected in response to the momentary actuation
Glossary
automatic smoke alarm system
An alarm system whose smoke detectors initiate and transmit an alarm automatically.
Glossary
automatic sprinkler
A sprinkler head having a nozzle which is normally closed, but opens when exposed to a predetermined quantity of heat
Glossary
automatic sprinkler system
1.A fire-protection sprinkler system connected to a suitable water supply; designed to provide an immediate and continuous flow of water