Piping Technology & Products, Inc. has developed a number of standard
designs based on our experience fabricating anchors for the different
requirements of our customers. The Shoe Decision
Tree illustrates the design options chosen for the standards included in
this section of the catalog. The decision diagrams are identified with capital
letters. Each path in the diagram represents a combination of which leads to a
standard Figure Number. In addition to these choices, there are options to
consider when slide plates are specified.
- The first option in the Shoe Decision
Tree is at node A. If the support
is to be welded to the pipe, the top branch is chosen. Otherwise, choose the
- At node B a choice is made between a single-T vertical member or two
vertical members (double-T). The double-T shoe is stronger and always comes
- At node C, decide if you want cradles. Cradles are an efficient way to add
strength and stability. They may not be necessary for small pipe where a
single-T bar is sufficient.
- At node D, choose whether to include a slide plate or not. Slide plates
reduce friction when the pipe moves and protect the pipe and supporting
structure from stresses required to overcome friction. Shoes without slide
plates can be welded to a structure to function as anchors.
- At node E, decide whether to include a guide with the slide plate. A guide
will allow movement along the axis of the pipe while restricting lateral
- If the shoe is not welded to the pipe, node F shows two choices for
attachment: either U-bolts or flat bar clamps. All the shoes with these
options are shown with cradles and slide plates.
- At node G, a choice is made whether to include a guide. At node H a choice
is made on how to attach the base of the slide plate. Welding is the most
common method of installation, but safety or other considerations may cause
you to choose a base plate which can be bolted to the supporting structure.
Slide plates must have a low-friction material to slide smoothly, usually
PTFE, 25% glass filled or graphite. Graphite is used for higher temperatures and
loads. For temperatures above 500° F, it is good practice to include bolting to
insure the graphite remains fixed to its steel backing during movement. Please
see the Slide Plate
section of this catalog for more details.
We will fabricate shoes and anchors to your design or help you develop
special designs to meet your special requirements.