• Home
  • Download PDF
  • Order CD-ROM
  • Order in Print
Exterior Doors
Wood - 14044_142

Builder 3&2 Volume 02 - Construction manual for building structures
Page Navigation
  122    123    124    125    126  127  128    129    130    131    132  
Figure 4-17.-Three types of solid-core doors. doors with only atop and bottom rail, without horizontal or vertical muntins, are refereed to as “casement” or “French doors.” Storm doors are lightly constructed glazed doors. They are used in conjunction with exterior doors  to  improve  weather  resistance.  Combination doors consist of interchangeable or hinged glass and screen  panels. Flush Doors Flush doors are usually made up of thin sheets of veneer  over  a  core  of  wood,  particle  board,  or fiberboard.  The  veneer  faces  act  as  stressed-skin  panels and tend to stabilize the door against warping. The face veneer may be of ungraded hardwood suitable for a plain finish or selected hardwood suitable for a natural finish. The appearance of flush doors maybe enhanced by  the  application  of  plant-on  decorative  panels.  Both hollow-core  and  solid-core  doors  usually  have  solid internal rails and stiles so that hinges and other hardware may be set in solid wood. Two types of solid wood cores are widely used in flush-door construction (fig. 4-17). The first type, called a  continuous-block,  strip-  or  wood-stave  core,  consists of  low-density  wood  blocks  or  strips  that  are  glued together  in  adjacent  vertical  rows,  with  the  end  joints staggered. This is the most economical type of solid core. However, it is subject to excessive expansion and contraction unless it is sealed with an impervious skin, such as a plastic laminate. The second type is the stile-and-rail core, in which blocks are glued up as panels inside the stiles and rails. This type of core is highly resistant to warpage and is more  dimensionally  stable  than  the  continuous-block core. In addition to the solid lumber cores, there are two types of composition solid cores. Mineral cores (see fig. 4-17) consist of inert mineral fibers bonded into rigid panels. The panels are framed within the wood rails and stiles, resulting in a core that is light in weight and little  affected  by  moisture.  Because  of  its  low  density, this type of door should not be used where sound control is important. The  other  type  (not  shown)  has  particleboard, flakeboard, or waferboard cores, consisting of wood chips or vegetable fibers mixed with resins or other binders, formed under heat and pressure into solid panels. This type of core requires a solid-perimeter frame. Since particleboard has no grain direction, it provides  exceptional  dimensional  stability  and  freedom from warpage. Because of its low screw-holding ability, it is usually desirable to install wood blocks in the core at locations where hardware will be attached. DOORJAMBS The doorjamb is the part of the frame that fits inside the  masonry  opening  or  rough  frame  opening.  Jambs may be wood or metal. The jamb has three parts: the two side jambs and the head jamb across the top. Exterior doorjambs have a stop as part of the jamb. The stop is the portion of the jamb that the face of the door closes against. The jamb is 1 1/4 inches thick with a 1/2-inch rabbet serving as a stop. 4-13







Western Governors University

Privacy Statement
Press Release
Contact

© Copyright Integrated Publishing, Inc.. All Rights Reserved. Design by Strategico.