open shaft

open shaft

A vertical duct or small enclosed passage within a building, open to the outer air at the top, and used to ventilate interior spaces connected to it. Also see light well.
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References in periodicals archive ?
To predict the quantity of smoke entering a shaft, Marshall (1986) developed an empirical equation based on the experiments in a 1/5 scale model of a fire compartment with a corridor and a 5-storey open shaft.
THE management company behind a Cardiff pub has been fined PS7,000 after a customer fell through an open shaft into the cellar.
To his horror, he realised that if the apparition had not diverted him he would have plunged down an open shaft to an almost certain death.
He stepped into the narrow open shaft in the expectation that the lift would be present for him to walk into, as it should have been.
He stepped into the narrow open shaft expecting the lift to be present for him to walk into.
Police and labour authorities have begun investigating the incident, which construction company officials say might have taken place when Mr Kumar slipped into the open shaft.
The seven-year-old called Kershi was out for a walk with his owner when he tumbled down the open shaft on wasteland near Bowesfield Industrial Estate, Stockton.
Lower Long Churn is a cave system which comes out half way down a large open shaft called Alum Pot 200 ft deep.
A short open shaft connected the engine to the three-speed gearbox, with top gear giving direct drive just like modern cars.
The new technical developments needed to allow TWINs with glass cabs to run in an open shaft allowed the architects of the Main Triangel building to maintain the light, open concept of the largely glass facade.
Tenders are invited for Covering Of Open Shaft Between Toilet And Bath In Type-Iv Qtrs.