Please Note: This decorative metal shelf bracket building guide is from the great old and out of print book called, '101 Metalworking Projects' and is available only from us in paper back (Highly Recommended!).
Subject and Uses: This braced bracket may be made to serve as a
support for a shelf or for a lantern. The design offers a great variety of
possibilities for innovation along the line of embellishment through
circles, curves, and twists.
is interesting to analyze how weight is supported by the different
members of a bracket and to trace the stresses and strains that are set
up in the joints and in the members under different kinds of loads.
Rivets are used for fastening the parts together. Holes for the rivets
should fit the shank, and should be countersunk where rivets are to be
flush with the surface. If the rivets are to have round heads on both
sides of the joint, an allowance must be made in their length so there
will be sufficient stock to form a head on the plain end.
The heads are rounded by a header, which is a tool with a recess the shape of the desired rivet head. This header is set on the rivet, and struck with a hammer until the desired head is formed.
Rivet heads may be flat, conical, hemispherical, or like a spike head or any shape that will help to make the bracket look more trim. In upsetting a rivet, a solid support is required. The rivet is struck squarely in the center to begin with, then light blows follow around until the head assumes a symmetrically rounded shape.
Small rivets are upset
cold, while on structural steel and boiler work, the rivet is heated
red-hot, inserted in the rivet hole, upset, and formed before it has
cooled off, the shrinkage, in cooling, drawing the joint together with
an enormous force.
Object of Lesson: Making a twisted brace; riveted joints; and ring
Tools and Equipment: Riveting hammer; vise; hack saw; drills;
Materials Required: One piece of band iron, 1/8 by 1/2 inch, 38 1/4 inch long, for back, ring, top, and brace; 10 rivets, 3/16 by 3/8 inch.
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