Aci 315-99 supersedes aci 315-92 and became effective August 31, 1999

3.5.5 Beams and joists —For beams, joists, and girders, re-
inforcing steel is usually shown in schedules. Bending details
may be separate or incorporated in the schedule. The detailer
must show number, mark, and size of members; number, size,
and length of straight bars; number, size, mark, and length of
bent bars and stirrups; spacing of stirrups; offsets of bars; lap
splices; bar supports; and any other special information nec-
essary for the proper fabrication and placement of the rein-
forcing steel.
Among the special items that must be noted are:
1. Overall length of bar;
2. Height of hook where such dimensions are controlling;
3. Lap splice lengths;
4. Offset dimensions, if any; and
5. Location of bar with respect to supporting members
where the bar is not dimensioned symmetrically on each side
of the support.
3.5.6 Slabs—Reinforcing steel for slabs can be shown in
plan views, in a schedule, and sometimes even in section.
The schedule and bending details for slabs are similar to
those for beams.
Panels that are exactly alike are given an identifying letter
and reinforcing steel is shown for only one panel of each
kind. In skewed panels, such as for the quadrant of a circle,
the bars are fanned out so that they are placed at the required
spacing at a specific location, usually at the midspan. Addi-
tional bars around openings, if required, must be shown.
3.5.7 Columns —Placing drawings for columns generally
use a schedule form for detailing. The detailer must not only

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 315-12
MANUAL OF CONCRETE PRACTICE
interpret the structural drawing, but clearly convey this inter-
pretation to the placer. The detailer must show the quantity,
size, and length or mark of all bars, including dowels, prin-
cipal vertical bars, and ties. The detailer must also include
plan sketches of typical bar arrangements for all but the sim-
plest conditions. The detailer must clearly show length and
location of lap splices, location of mechanical splices or
welded splices, and position of offset bars.