H-line Flashcards
How do you calculate supported joist length
half clear spans of joists on each side of beam
+plus the beam with
.5 x joist length + beam width + .5x joist
How do you calculate the supported joist length for buildings for more than one beam
Each beam calculated separately
Are beam lengths in the codebook Imperial or metric
Metric
If the size of the beam is unknown how do you calculate that supported joist length
Assume the beam is three ply
What is the definition of the supported joist length
- The amount of load that a beam carries is proportional to the amount of floor that it supports.
- The amount of floor is the S.J.L.
- The S.J.L. is a distance equal to the length of joist supported by the beam
Why have framing systems been developed ?
To construct low rise residential and commercial buildings up to 3 floors
On which framing system is the standard stud length based
Standard platform framing
Which framing system is used to create large open spaces
Post, beam, plank construction
Why would the foundation design be different for post, beam and plank framing?
To support concentrated loads
Which framing system is the fastest to construct
Platform frame construction
Which framing system requires its components to be designed by registered professional engineer
Post, beam, plank construction
Which part of building code covers the design of platform framing
Part nine
Which type of framing system usually uses wood trusses
Platform frame construction
What must be done if changes are made to the structure of a woodframe
A complete review of design
Went to exterior finishes require special attention to shrinkage and settling
Masonry veneer and cement stucco
What is formed when two roofs intersect
Valley
What is done to allow the attic space to be used for living space
Building gable dormers with windows
What is another name for cripple stud
Trimmed stud
What are purlins
Beams used to support rafters or ceiling joists that run at right angles to rafters
What are the purposes of Girts
Blocking that stiffen the wall or acts as fire stops
With three functions does sheathing provide
Supports the finishes
Laterally supports the studs, joists or rafters
Braces the floor, wall or roof diagonally
How does a greater differ from a beam
It is a large beam
Explain the difference between a header and a trimmer and floor framing
Headers are perpendicular to the floor joist
Trimmers are parallel
What are two types of studies that are not full
Cripple, Jack
List three members that can be used to support the ceiling finish
Ceiling joists, ceiling rafters, roof joists
Where are collar ties used
Used to strengthen rafters and reduce unsupported span
What are airspaces
The gaps are on the ends of members such as a beam pocket allowing air to circulate and preventing decay
What does the term breaking joints mean
Describe staggering the joints in cheating or top plates usually offset by 4 feet but according to code by 2 studs or more
What is a cornice
I would projection of the roof where it meets the wall
What is a camber
And upward curve built into it to prevent sagging the due to its own weight or its load
What is a soffit or plan over
The underside of a building component
When is another name for cornice
And eave
What is a gable
The triangular shaped end of the gable roof
What is the purpose of a rough opening
To allow for doors windows there’s other items
What is the density of wood
500 to 600 kg cubed
What is the density of steel
8000 kg cubed
What is the density of concrete
2400 kg cubes
Why does using wood for window fans reduce condensation on the inside surfaces
Doesn’t sweat when exposed to differences in temperature
How long does it take for Wood to mentor to a size that it can be harvested
40 to 100 years
List five engineered building products
Particleboard, waferboard, dense fiberboard, parallel strand beams, plywood
What happens to Wood when exposed to atmospheric changes
Swells or shrinks
How can a wood beam and that sporting events steel beam after a fire
It burns slower than the HoT MetaL weakening
