Framing Assignment 4Print Set“Single Family Dwelling”
SFD
Windows & Doors
Openings:Windows and doors
• Major impact on the house’s appearance
• Many Style options
Windows and Doors: Major part of …. The comfort / safety of the house Energy performance of the house Many of them (Multiples) with variables = Scheduled
Windows & DoorsDoors - Labeled on plans with number inside circle
Windows – Labeled on plans with letter inside octagon or triangle
…Labels refers back to a schedule
Typical Section details
Head (top)
Jamb (side)
Sill (base)
R.O. (ROUGH OPNG.)F.O. (FINISH OPNG.)
Window Sections
•Size 6040 = 6’ W x 4’ L (or hgt.)
•Type - Operation •Glazing – glass type•Material – frame type
Window Schedule
Window Schedule
U-FACTOR
Solar Heat Gain Coefficient
Visible Transmittance
Air Leakage
4 Ways to Evaluate
WINDOWS
U-FACTORThe rate of heat loss is indicated in terms of the U-Factor of a window assembly. The insulating value is indicated by the R-Value which is the inverse of the U-Value.
The lower the U-Value the greater a windows resistance to heat flow and the better the insulating value.
U-FACTOR
The SHGC is the fraction of incident solar radiation admitted through a window.
SHGC is expressed as a number between 0 and 1. The lower a windows solar heat gain coefficient, the less solar heat it transmits.
Solar Heat Gain COEFFICIENT
The visible transmittance is an optical property that indicates the amount of visible light transmitted.
Theoretical values vary between 0 and 1, but most values are between 0.3 and 0.8
Visible Transmittance
Heat loss and gain occur by infiltration through cracks in the window assembly.
Air leakage is expressed in cubic feet of air passing through a square foot of window area.
.3 is recommended for Oregon
Air Leakage
Glass is coated with silver or tin oxide which allows visible light to pass through but reflects infrared heat radiation back into the room. Reduces heat loss in cool climates
Allows visible light to pass through but reflects infrared heat radiation away from the room, admits up to 40% less radiant heat from the sun. Reduces heat gain in warm climates
Low-E Windows
High number for cold climate. Low number for warm climates
The lower the number the better the insulating value
The best windows have air leakage rating between 0.1 and 0.6 cfm/ft.
Varies from 0 to 1.0 The higher the # the more light is transmitted.
Single-Glazed with Clear Glass
Single-Glazed with Bronze or Gray Tinted Glass
Double-Glazed with High Solar Gain Low-E Glass, Argon/Krypton Gas
Triple-Glazed** with Moderate Solar Gain Low-E Glass, Argon/Krypton Gas
Windows used for Egress
when there is Fire
Codes regulate size & location
Flashing...at window head and at sloped sill
Window in section view
…All efforts to direct water away from exterior bldg. wall
DOORS
Door
Head
Jamb
Sill
Example of Finish item found in Schedule – Trim ….Base (of wall)
Trim details•Crown (at ceiling)•Base (at floor)•Casing (around openings)•Wainscot (mid wall)