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Ch 4 Construction
Doors
| Question | Answer |
|---|---|
| Doors are classified by | style and construction material (influences its effectiveness) |
| Swinging Doors | rotates by hinges secured to the side jambs of the doorway or on a pivot post supported at the top and bottom. Single or double leaf. required exit doors in means of egress |
| Sliding Doors | suspended from an overhead track and uses steel or nylon rollers so door doesn't swing laterally. never allowed as a means of egress, used to protect openings that are part of a means of egress |
| Fire Doors | specially tested, constructed and approved fire rated door assembly designed and installed to prevent fire spread by automatically closing and covering a doorway in a fire wall to block the spread of fire through the door opening |
| Folding Doors | overhead track with rollers or guides, bifolding or multifolding, residential occupancies, divide large conference rooms and as horizontal fire doors |
| Vertical Doors | open in vertical plane known as overhead doors, industrial occupancies (Loading dock, garage doors, freight elevator doors, fire doors) single leaf raise in vertical guides or two horizontal panels |
| Revolving doors | wings are design to collapse under pressure and provide an unobstructed opening. Most models employ a collapsing mechanism that allows the wings to open to a book fold position when wings are pushed in operate direction |
| Wood panel door | vertical and horizontal members that frame a rectangular area. The panels of wood, glass, or louvers are placed within the framed rectangular area |
| Flush door | flat face panels that are full height and width of door. attached to solid or hollow core. designed with openings to accommodate glass vision panels or ventilation louvers. smooth unbroken finish |
| Solid Core doors | formed with an interior core of laminated blocks of wood, particleboard, or a mineral composition. covered with two or three layers of surface material made of plywood, better fire barriers |
| Hollow Core door | constructed with spacers between the face panels to provide lateral support, interior spacers consist of a grid or honeycomb of wood, plastic, or fiberboard, Lighter and less expensive. used interior |
| Glass doors | both exterior and interior. used in office buildings and mercantile buildings, framed or frameless. Glass must be tempered glass |
| Metal doors | hollow door made from steel or aluminum or heavy steel. sound deadening material placed between the ribs |
| Fire Doors | protect openings in fire related walls and block the spread of fire within a structure |
| Construction and operation of fire doors depend on | Type of occupancy, amount of space around the door opening, required fire protection rating for the door |
| Most fire doors are constructed of | metal and may roll, slide, or swing into place when released |
| Special types of fire rated doors are available for | Freight and passenger elevators, security, chute openings, service counter openings, dumbwaiters |
| Overhead rolling steel fire doors | protect fire wall openings in an industrial occupancy or an opening in a wall separating buildings into fire areas, relatively inconspicuous and does not use wall space next to opening, closes by gravity when fusible links melt. cannot be used as egress |
| Overhead rolling door is constructed of interlocking steel slats with other components such as | Releasing device, Governors, Counterbalance and mechanism, wall guides |
| Horizontal Sliding fire doors | industrial or storage buildings held by fusible link and slide into position along a track either by gravity or by counterweight. cannot be used to protect openings as a means of egress |
| Materials that are used to construct horizontal sliding doors | metal covered, wood core door, vent hole is provided in sheet metal to vent the gases of decomposition. metal used is steel, galvanized sheet metal, and terneplate |
| Swinging Fire Doors | stair well enclosures, must be closed during a fire. automatic or self-closing. fusible link or smoke detector |
Created by:
Jwbarnett27