| DETAIL DRAWINGS
Detail drawings are more specific than other types of construction plans.
They are generally drawn on a larger scale and show features that do not
appear on other plans.
SECTIONS
Sections are drawn to a large scale showing details of a particular
construction feature that cannot be
given in a general drawing. They show—
· Height.
· Materials.
· Fastening and support systems.
· Any concealed features.
A typical wall section,
with parts identified
by name and/or size,
is illustrated in
Figure 1-9, page 1-10.
This figure shows
how a structure looks
when cut vertically by
a cutting plane.
Wall sections are very
important to
construction
supervisors and to
the craftsmen who do
the actual building.
They show the
construction of the
wall, as well as the
way in which
structural members
and other features
are joined to it. Wall
sections extend
vertically from the
foundation bed to the
roof. Sections are
classified as typical
and specific.
Typical Sections
Typical sections are
used to show construction features that are repeated many times throughout
a structure.
Specific Sections
When a particular construction feature occurs only once and is not shown
clearly in the general drawing, a cutting plane is passed through that
portion.
DETAILS
Details are large-scale drawings which show features that do not appear
(or appear on too small a
scale) on the plans, elevations, and sections. Sections show the builder
how various parts are connected
and placed. Details do not have a cutting-plane indication, but are simply
noted by a code. The
construction of doors, windows, and eaves is usually shown in detail drawings.
Figure 1-10 shows some
typical door framing details, window wood-framing details, and an eave
detail for a simple type of
cornice. Other details which are customarily shown are sills, girder and
joint connections, and
stairways.
Figure 1-11, page 1-12, shows how a stairway is drawn in a plan and
how riser-tread information is
given. For example, on the plan, DOVVN 17 RISERS followed by an arrow
means that there are 17
risers in the run of stairs going to the firs floor from the floor above,
in the direction indicated by the
arrow. The riser-tread diagram provides height and width information.
The standard for the riser, or
height from the bottom of the tread to the bottom of the next tread, ranges
from 6 1/2 to 7 1/2 inches.
The tread width is usually such that the sum of riser and tread is about
18 inches (a 7-inch riser and
11-inch tread is standard). On the plan, the distance between the riser
lines is the width of the tread. |
