roofs

Report
.
Roofs
8
12
Walls
Exterior Walls in Elevation: see
Materials & Bldg. shape
Roof is 8:12 Pitch /or slope Cladding is drawn as
Brick & Stucco siding

Rafters
Roof slope
Roof
Bear
framing
supports - give
roof profile/shape
Pitch/slope ratio every 12” out raise
the rafter 5”or 5:12
A Rafter & ceiling
joist system maybe
substituted for ...A
System of …
Roof Trusses.
Wall & Roof
Framing
Rarely seen drawn out
completely in a working
drawing set!
Walls
need to clarify a
construction
condition...Use a DETAIL
Like at the
Eave Rake or Ridge of Roof
Details
focus in from general to the
specific condition
*
•drawn in orthographic
(2-D) Bldg. Section
.
Details:
Roof detail of eave
Roof detail would be at
ridge Rake wall.
Joists or trusses in a Dwg Set. :
1st floor joists found on foundation plan or separate 1st fl.
Framing plan
2nd floor maybe on first floor plan
Roof trusses or ceiling joist maybe on 2nd floor plan.
.
....Here are
Headers(HDR) on
a Roof Framing
plan even though
they are part of
the Wall Framing
Walls
Plan
shows the Roof
truss layout
Wall
Framing
Walls
Sheathing
Tilting up the
wall from the
platform
framing
....(here a
Roof’s Rake
Wall goes
up.)
Structural info
need to know for Roof
and wall framing
*headers
*brace panels
*bearing walls
*spacing/size/span of roof
truss or rafters ceiling joist
*
Roof framing
*headers
*spacing/size/span of
roof truss or rafters ceiling
joist
*
Ridge
beam
Eaves
Hips
collar-ties &
ceiling joists
overhangs
& Rake
wall
valleys …
p.129
Roof Framing – Basic components
Walls
Roof Framing
Framing
Contractor familiar with Common Shapes for roofs
Walls
Roof Framing sometimes drawn to show a complex roof System
…most of the time ceiling joist laid over 2nd floor plan
Walls
Roof Plan is different than Roof Framing Plan -
Roof slope
Bear
pic of platform &
balloon Walls
p.186
print reading for construction
Roof
Framing
Terms
Pitch
to describe
Slope or incline of
roof Ratio b/w
Horizontal run &
Vertical rise
…a 6:12 roof
(…means for every
12” rafter rises
6”)
Symbol is
a“sideways” L
with ratio (found
on the bldg.
section dwg.)
Roof Truss
Shape
of roof pitch
W Truss – most
common / engineered
Spans longer
distances
Walls
W TRUSS
Roof Framing
Common Shapes of Roof Trusses & Framing
Flat roofing
system
A Detail at bldg.
edge “the curb”
....insulation is
rigid (not batt)
*
Section
The profile
(or slope) of
typical roof
constructions
*
Insulation &
ventilation key
parts of enclosure
system.
*
isometric view of eave venting
Cross Ventilation
at roof prevents
moisture build up
...want similar
amount of air in
as out (sim.
temp.) air
flowing across
roof rafter.
Walls
Roof Framing -Eave Detail
shows how roof and wall meet ... venting & soffit
Pictorial view Isometric of Roof
Lookout

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