The Saint Paul globe. (St. Paul, Minn.) 1896-1905, 1901-08-30
PART xxi.
SKELETON IRON AND STEEL CON-
STRUCTION.
See. I3I. Steel Construction

Sec. I3I. Steel Construction
Where columns are used to support
iron or. steel Orders carrying enclosing
walls, in buildings over six stories in
height, the said columns shall be of cast
iron, wrought iron, or rolled steel, and
on their exposed outer and inner sur
faces be constructed to resist fire by
having a casing of incombustible ma
terial not less than eight inches in thick
ness on the outer surfaces, nor less than
four inches in thickness on the inner
surfaces and all bonded in the incom-
The exposed sides of the iron or steel
Orders shall be similarly covered in with
incombustible material not less than four
inches in thickness on the outer sur
faces and tied and bonded, but the ex-
IRENE outer edge Of the hanges Of beams,
or plates or angles connected to the
beams, may project to within two inches
of the outside surface of the brick cas-
ing. The inside surfaces Of Orders may
be similarly covered with incombustible
material, or if projecting inside of the
wall they shall be protected by terra
Gotta, concrete or other freproof ma
terial.
Sec. I32. Steel and Wrought Iron
Columns
No part of a steel or wrought iron col
umn shall be less than one-quarter of
an inch in thickness. All wrought iron
cordance with requirements Of this Code
The ends of all columns shall be faced
to a plane surface, at right angles to the
axis of the columns and the connection
between them shall be made with splice
plates. The joints may be effected by
rivets of a sufficient size and number to
transmit the entire stress, and then the
splice plates shall be equal in sectional
area to the area of the column sp1iced.
When the section of the column to be
spliced is such that spliced plates cannot
be used, a connection formed of plates
and angles may be used designed to
properly distribute the stress.
Steel and wrought iron columns shall
be made in one, two or three-story
lengths, and the materials shall be rolled
in one wherever practicable, to avoid
a section of a column projects beyond
that of the column below, the difference
shall be made up by filing plates, Sc
cured to column by the proper number Of
rivets. Shoes, or plates, Of steel or iron,
as described for cast iron columns, or
built shoes of plates and shapes may be
used, complying with the same require
ments.
Sec. 1873. Cast Iron Columns
All cast iron columns shall be in ac-
cordance with the requirements of this
Code, and shall be of good workman
ship and material. The top and bottom
flanges and Jugs shall be of ample
strength, reinforced by fillets and brack-
cts; they shall be not less than one inch
in thickness when finished.
All columns shall be faced at the ends
to true surface perpendicular to the
axis of the column.
Column joints shall be secured by not
less than four bolts each, not less than
hree-quarter-inch in diameter. The
holes for these bolts shall be drilled to a
template.
The thickness Of metal shall be not less
than three-quarter inch. Wherever the
core of a cast iron column has shifted
more than one-fourth the thickness Of
the shell, the strength shall be compSted
assuming the thickness of metal all
round equal to the thinnest part, and the
column shall be condemned if this COM
putation shows the strength to be less
than required by this Code.
Wherever blow-holes or imperfections
are found in a cast iron column, which
reduces the area of the cross section at
that point more than ten per cent, such
column shall be condemned.
Iron or steel shoes of plates shall be
used under the bottom Of columns to