Rolling beams and steel plate are processes most often used to curve metal. With the right machines, machine operators, and methods, however, the processes can also be used to straighten steel sections.
In our plant today we are straightening three different shapes on three different machines for three different customers and for three different applications.
In a plate . . . → Read More: Straightening Sections by Rolling Beams and Steel Plate
Recently, a miscellaneous steel fabricator came to me with a very challenging project for circular stairs. They were looking to make a curved monumental staircase using 20 x 8 x 5/8 rectangular tubes. The stair was elliptical, had a reverse “S”shape curve at the bottom, and, of course, required helical spiral bending.
The curvature at . . . → Read More: Built Up Box Stair Stringers for Circular Stairs
Roller/benders in the steel industry (those who specialize in curving steel) often work with miscellaneous and ornamental fabricators providing them with helical stair stringers to create circular stairs. Most often these circular staircases are rather large, suitable for a ballroom or spacious, multi-story atrium. Indeed they are called “monumental stairs.”
The most common circular stairs, however, are much . . . → Read More: Circular Staircases Large and Small
Steel section bending, whether it is curving angles, bars, beams, channels, tees, or other sections, most always requires extra material at the ends of the rolled material. This extra material goes by several names: “trim,” “waste,” “pick-up,” “tangent,” “grip,” “run-off,” and “lead in” and “lead out.”
If the steel section is being curved on a three-roll bender . . . → Read More: Steel Section Bending: How Much Extra Material Is Required?
Rolled angle rings are commonly used as angle flanges to connect cylinders or pipe. Welded to the pipe or cylinder, the mating angle rings are commonly bolted together through holes put in the horizontal leg of a leg-out angle ring. (Leg-out angle rings look something like a old timey straw hat without the top. The brim . . . → Read More: Bolt Holes in Rolled Angle Rings
A convergence of events including the
increasing acceptance of beam bending by cold cambering,
standardized design of steel bridges, and
increased availability of domestically produced jumbo beams
all contribute to making steel the solution for bridges.
AASHTO (American Association of State Highway and Transportation Officials) has recently been revised its specifications to allow cold cambering of rolled beams.
Article 220.127.116.11.6 has been . . . → Read More: Beam Bending by Cold Cambering Contributes to Making Steel the Choice for Bridges
When one considers ways to bend a large channel flanges-out to a minimum bending radius, doing a mandrel bend is one alternative. A recent requirement was for more than 200 rolled channel, bump protectors to cover cement columns in an airport. The design called for MC12 x 10.6 curved to a very tight 12-1/2 inch inside . . . → Read More: Alternatives to a Mandrel Bend of a Large Channel to a Minimum Bending Radius.
A civil engineering student recently inquired about steel tube bending for an algae growing tree. She first heard of Chicago Metal Rolled Products last fall when its president talked to her Materials of Construction class at the Illinois Institute of Technology.
With students of several majors, she is working on an inter-professional project to design a tree-like . . . → Read More: Steel Tube Bending for an Algae Growing Tree