ANSWER TO REVIEW QUESTION 5
On floor framing plans, such as the one shown in figure 2-20, reinforcing bars are identified by reference
numbers. Data pertaining to the bars will be explained in various schedules next to the reference number. (para 2-
14, a)(fig 2-20)
ANSWER TO REVIEW QUESTION 6
There is no symbol for grout. Whenever it is used, the grout thickness is noted. (para 2-15, e)
Section IV. Structural Steel
(1) Angles (L). The angle is a standard
2-18. INTRODUCTION
structural shape whose cross-section resembles the
Structural members are normally cut and fitted in
letter L. Angles are used singly or in combinations of
special fabricating shops and transported to the
two or four angles to form main members. They are
building site for final assembly and erection. Steel
also used to connect two main members or parts of
structures are composed of rolled-steel shapes used
members together. Angles are identified by the
either singly or built up to form members. In the
dimensions of their legs, measured in inches along
field, members are erected in their relative positions,
the outside or backs of the legs. The sequence in
fastened temporarily with bolts and driftpins, and
which dimensions of angles are noted is: symbol
permanently connected with rivets, bolts, or by
followed by dimension of wider leg first and
welding.
thickness of the legs third (both legs always have
equal thickness). Thus L7 x 4 x 1/2 indicates that the
steel section is an angle whose legs are 7 inches and 4
a. Structural
Shapes
and
Symbols.
Structural steel drawings show the shapes and sizes
inches wide and 1/2 inch thick.
of the steel used and the details of assembly of the
parts. Note the sections of common rolled-steel
(2) Plates ( ). Plates are noted by width,
shapes shown in figure 2-29. The symbols used to
thickness, and length. Thus, 1
11 x 3/8 x 2'-7"
identify the shapes in notes, dimensions, and bills of
indicates that the item is a single plate whose
material are shown in parentheses.
dimensions are 11 inches at its widest point, 3/8
inches thick, and 2 feet, 7 inches at its longest point.
(3) Standard I-Beam (I). The I-beam is a
standard structural shape whose cross-section is in
the form of the letter . I-beams are used as beams,
columns, truss members, and any other application
where their shape makes their use desirable. An I-
beam is identified by its nominal depth in inches and
weight in pounds per foot of length. For example,
the notation 15 I 42.9 designates an I-beam that has a
nominal depth of 15 inches and weighs 42.9 pounds
per linear foot.
(4) Wide-flange shapes (WF). The wide-
flange shape is a standard structural shape whose
Figure 2-29. Common rolled-steel shapes and
cross-section is in the form of
symbols.
75
Previous Page
