minimum bend diameters have been established for
the different bar sizes and for the various types of
hooks. These bending details are shown in figure 7-11.
You can use many different types of bends. The one
you select depends on where you are to place the rods.
For example, there are bends on heavy beam and
girder bars, bends for reinforcement of vertical
columns at or near floor levels, bends for stirrups and
column ties, bends for slab reinforcement, and bends
for bars or wire for column spiral reinforcement. To
save yourself some time and extra work, try to make
all bends of one kind at one time instead of
remeasuring and resetting the templates on your
bending block for different bends.
Figure 7-11.Standard hook details
The Iron master Portable Hydraulic
Rod Bender and Shear
The Ironmaster portable hydraulic rod bender and
shear (fig. 7-12) can cold-work reinforcing bars into
various shapes for use in concrete construction work.
The machine is capable of working reinforcing bars
up to and including No. 11 bars, which is equivalent
in a cross-sectional area to 1 1/4-inch (31.75 mm)-
square or 1 1/2-inch (38.1 mm)-round bar.
In addition to all sizes of reinforcing bars, the
Ironmaster will also work bars of higher carbon
content desired in the fabrication of anchor bolts, and
so forth. However, limitations must be imposed when
considering bar of 1-inch (25.4 mm) diameter or
greater that have a carbon content of greater than 0.18
percent, such as SAE 1020 cold-finished steel. Bars
under 1 inch (25.4 mm) in diameter should have a
carbon content of no greater than 0.37 percent, such
as SAE 1040 C. F. steel.
Although the Ironmaster is powered to work steels
of heavier sections than 1 1/2-inch (38.1 mm)
reinforcing bar, the manufacturer must place safety
limitations on it when considering various alloys and
shapes of steel. Users will undoubtedly adapt this
versatile machine to perform work other than common
bar bending, such as bending flats and angles.
However, the primary intention of the manufacturer
was to produce a machine for bending concrete
reinforcing steel. The manufacturer recommends that
the Ironmaster not be used on steels heavier than 1
1/4-inch (31.75 mm)-square
mm)-round reinforcing bar.
or 1 1/2-inch (38.1
Figure 7-12.Ironmaster portable hydraulic bender and