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ROOF PRESSURE [11 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2019-10-30

English

Subject field(s)
  • Modern Construction Methods
  • Roofs (Building Elements)
DEF

The practice of providing regularly spaced or continuous openings at a roof perimeter.

OBS

This [practice] to some extent relieves water vapour pressure or dries out the roofing system, usually combined with venting channels in the insulation and stack venting towards the centre of the roof.

French

Domaine(s)
  • Procédés de construction modernes
  • Toitures (Éléments du bâtiment)
DEF

Pratique consistant à prévoir des ouvertures continues ou à intervalles réguliers sur le périmètre d'un toit.

OBS

Ces ouvertures permettent dans une certaine mesure de libérer la pression de vapeur d'eau ou de faire sécher la couverture.

Spanish

Campo(s) temático(s)
  • Métodos de construcción modernos
  • Techos (Elementos de edificios)
Save record 1

Record 2 2017-10-17

English

Subject field(s)
  • Occupation Names (General)
  • Mining Operations
DEF

[One who] operates machine to install roof-support bolts in underground mine : Positions safety jack to support roof until bolts can be installed. Drives machine into position, inserts bit in drill chuck, and starts drill. Moves lever to advance bit into roof at specified distance from rib or adjacent bolt. Removes bit from chuck and replaces with bolt. Starts hydraulic action which forces bolt into hole. Starts rotation of chuck to turn bolt and open expansion head to exert pressure upon rock formation. Tests bolt for specified tension, using torque wrench.

French

Domaine(s)
  • Désignations des emplois (Généralités)
  • Exploitation minière
DEF

[Personne qui] conduit une machine qui installe les boulons d'étançonnement dans le toit des galeries des mines : Place les vérins de sécurité pour soutenir le toit jusqu'à l'installation des boulons. Met la machine en position, place le fleuret dans le mandrin et met la machine en marche. Manœuvre le levier pour faire pénétrer le fleuret dans le roc du toit, à une certaine distance de l'étançon ou du boulon voisin. Retire le fleuret du mandrin et met un boulon dans le mandrin. Déclenche la poussée hydraulique qui force le boulon à entrer dans le trou creusé par le fleuret. Met en marche le mouvement rotatif du mandrin pour visser le boulon et ouvrir la tête à expansion qui fera pression dans le roc. Vérifie la tension de boulons à l'aide d'une clef dynamométrique.

Key term(s)
  • boulonneur dans le toit
  • boulonneuse dans le toit

Spanish

Save record 2

Record 3 2000-04-10

English

Subject field(s)
  • Oil and Gas Distribution Facilities
  • Storage of Oil and Natural Gas
DEF

A tank whose roof rises and falls with the changes of pressure in the tank but does not float on the product stored in the tank.

French

Domaine(s)
  • Install. de distrib. (Pétrole et gaz naturel)
  • Stockage du pétrole et du gaz naturel

Spanish

Save record 3

Record 4 1999-05-11

English

Subject field(s)
  • Mining Operations
DEF

The sliding or reduction in height of a support to accommodate roof pressure.

OBS

(Of props, arches, etc.).

PHR

Resistance yield curve, resistance to yield.

French

Domaine(s)
  • Exploitation minière
DEF

Glissement de poinçon dans le fût d'un étançon lorsque la pression atteint un certain niveau dit charge de coulissement.

PHR

Courbe caractéristique de résistance-coulissement, résistance au coulissement.

Spanish

Save record 4

Record 5 1999-05-11

English

Subject field(s)
  • Mining Operations
CONT

The driving of a narrow roadway results in the development of a pressure arch over the excavation. The strata within the arch bend slightly and cease to support the overlying beds, and the load is transferred to the solid coal or rock along the sides. The wider the roadway, the greater is the span of the arch and its height at the crown. A similar but larger pressure arch is formed across a longwall face, with one leg resting on the solid coal and the other on the solid pack behind the coal face.

PHR

Roadway pressure arch, roof pressure arch, span of pressure arch, width of pressure arch.

Key term(s)
  • floor pressure arch

French

Domaine(s)
  • Exploitation minière
PHR

Voûte de pression au-dessus d'une galerie.

PHR

Largeur d'une voûte de pression, portée d'une voûte de pression.

Key term(s)
  • voûte de toit

Spanish

Campo(s) temático(s)
  • Explotación minera
Save record 5

Record 6 1998-08-04

English

Subject field(s)
  • Mine Passages
DEF

A device to allow roadway steel arches a measure of yield under roof pressure to prevent buckling.

French

Domaine(s)
  • Galeries et soles (Mines)

Spanish

Campo(s) temático(s)
  • Galerías (Minas)
Save record 6

Record 7 1998-06-01

English

Subject field(s)
  • Mining Operations
DEF

The initial pressure of the roof strata when undermined by coal or metal mining at the face. This movement is natural and inevitable and normally the face supports are able to control it.

French

Domaine(s)
  • Exploitation minière

Spanish

Save record 7

Record 8 1994-12-22

English

Subject field(s)
  • Storage of Water
CONT

Even gravity fed water from a roof tank is sufficient pressure for flushing....

French

Domaine(s)
  • Stockage des eaux
CONT

Même l'eau alimentée par gravité d'un réservoir au toit assure une pression suffisante.

Spanish

Save record 8

Record 9 1994-07-13

English

Subject field(s)
  • Papermaking Machines
CONT

Pressure Formers. Beloit modified their design of suction former to produce the Hydraulic Former.... It had been found that the pressure differential was easier to control when the vacuum system was removed and hydraulic pressure increased within the forming lid. Subsequently, the hydraulic channel was simplified utilizing an adjustable throat as the flow control. The only other operating variables are the area of the roof(which helps to control forming pressure) and the location of the couch roll.

French

Domaine(s)
  • Machines à papier
CONT

Les formeurs hydrauliques. Après avoir constaté qu'il était plus facile de régler et de maintenir une différence de pression en supprimant le système d'aspiration et en augmentant la pression hydraulique sous le plafond de la zone de formation, Beloit a modifié le formeur Stevens pour fabriquer le formeur hydraulique Hydraulic Former [...] Le canal hydraulique a été simplifié ultérieurement, une gorge réglable étant utilisée pour réguler le débit. Les autres variables d'exploitation sont la surface du plafond, qui permet de régler la pression de formation, et la position du cylindre aspirant.

Spanish

Save record 9

Record 10 1992-01-22

English

Subject field(s)
  • Fixed Rescue Facilities (fire)
CONT

The automatic electric water system with a capacity of not less than 5 gpm at 30 pounds pressure, and 3/4" garden hose with ordinary nozzle, will reach the roof of the ordinary farm building. This is a minimum of fire protection and is not recommended or recognized by the Underwriters.

French

Domaine(s)
  • Installations fixes de secours (incendies)
CONT

Un réseau de distribution, alimenté par une électropompe ayant un débit minimum de 5 gal/min sous 30 livres de pression, et un tuyau d'arrosage de 3/4 po muni d'un ajutage ordinaire, suffisent à projeter l'eau à hauteur de la toiture des bâtiments de ferme ordinaire. Il s'agit là d'une protection minimum qui n'est ni recommandée, ni reconnue par les Laboratoires des assureurs du Canada.

Spanish

Save record 10

Record 11 1985-01-17

English

Subject field(s)
  • Estimating (Construction)
  • Civil Architecture
CONT

There are two main types of pressurized structure but really unambiguous descriptions of them do not yet exist :(a) those that are held up by ribs or inflated "tyres" and therefore do not need an air lock to allow inward or outward access;(b) those that do need an air lock, have no inflated ribs and therefore must be held up by an internal air pressure slightly above atmospheric.... The ribbed structures are called "air inflated" and the non-ribbed ones "air supported".... The air-supported structures... are often used as a temporary shelter.... The edges must be weighted, or buried in soil which comes to the same thing, so as to counterbalance the upthrust on the roof skin of the small excess pressure.

French

Domaine(s)
  • Évaluation et estimation (Construction)
  • Architecture civile
OBS

Il existe divers types de structures gonflables : l'enveloppe entièrement close, amarrée par un filet et soutenue par la surpression de l'espace interne; la couverture solidaire du sol en périphérie, soutenue de la même façon; la couverture fixée à une ossature gonflable. Sauf dans le dernier type où l'espace n'est pas surpressé, l'accès se fait par un sas ou par une porte tournante.

Spanish

Save record 11

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