202A Framing Systems Flashcards
Name the 5 systems used for wood frame construction.
1) platform framing
2) balloon framing
3) post and beam
4) pole construction
5) structural insulated panels
What is the distinguishing feature of western platform framing?
Floors and walls are constructed separately, with the completed floor becoming the working platform.
What acts as fire-stops in platform framing?
Wall plates
What is the disadvantage of using solid lumber floor joists in platform framing?
Shrinkage occurs in the width of the floor joists.
In balloon framing, how high do the wall studs extend in a two-storey building?
Each stud is toenailed to the sill plate and is continuous from the sill plate to the roof rafters.
How are floors supported in balloon framing?
The main floor rests on the foundation mud sill. Upper floors are nailed to the side of the studs and rest on a let-in ribbon.
What is a major advantage of balloon framing?
Balloon framing has fewer problems associated with shrinkage of the framing lumber.
Why can framing members in post and beam construction be spaced farther apart than in platform or balloon framing?
Individually, the larger framing members are able to support greater loads.
Why is thicker roof sheathing required for post and beam construction?
Roof beams are spaced farther apart and the thicker sheathing is needed to reduce its deflection.
What is the interior and exterior finish attached to in post and beam construction?
Framed stud walls are erected between the posts to provide a means of attachment for the interior and exterior wall finishes.
What function do the poles serve in pole construction?
The poles act as a foundation for the building.
Why are structural insulated panels ideally suited for exterior walls?
The polyurethane foam core has excellent insulation properties.
What is the maximum allowable moisture content for framing lumber?
19 %
In the platform system, which framing member is used to support loads that occur over openings in walls.
Lintels
In balloon framing, how are roof and floor loads transferred to the foundation?
Roof loads are transferred directly to the foundation by the wall studs.
Upper storey floor loads are transferred to the studs by a let-in ribbon. The studs then transfer the loads to the foundation.
