Page 129 - Cable Art Inc Catalog

Structural Rod Systems

Pin Overview

Applications Dimensions
Pin connections are a cost-effective method of connecting Refer to the Clevis Pin Table below for basic dimensions
two structural members which are subjected to simple tension of standard clevis pins. An additional dimension, ‘W’ is
loads. They make possible straightforward and rapid field determined as shown in the cotter hole spacing figure,
installation of bracing and support members. Because pin and is normally specified in 1/4” increments. Assembly
connections normally do not clamp the connected members, environment, coatings and thickness tolerances should all
they are generally only recommended for use in connections be considered when determining the fit-up allowance. The
where they are loaded in double shear. minimum recommended value is 1/4”.

W

G

C

W = G + C + Fit-Up Allowance
Cotter Hole Spacing for Straight Pins
Double shear and single shear connections

Relevant Standards
The American Institute of Steel Construction Inc. (AISC) Steel W
Construction Manual, 13th edition, page 15-19, defines basic
dimensions for both headed and straight clevis pins used in G STRUCTURAL ROD SYSTEMS
structural applications. The AISC manual identifies headed pins
as ‘vertical pins’ and straight pins as ‘horizontal’ pins, implying
that headed pins should be used in applications where the long
axis of the pin is oriented vertically. In these applications, a
straight pin could fall out of the connection if the cotter pin was
improperly installed or failed due to corrosion.
ANSI/ASME B18.8.1 defines dimensions and tolerances for
small cold formed clevis pins for use in machines and linkages.
This specification covers sizes from 3/16” through 1” diameter. C
Materials W = G + C/2 + Fit-Up Allowance
Smaller headed pins are produced from cold headed low carbon Cotter Hole Spacing for Head Pins
steel wire. Straight pins and larger headed pins (1-1/4” diameter
and up) are machined from ASTM A108 Grade 1117 bar stock.
Other available materials for machined pins include 1045, 4140,
A36, A572/A588, A193 Grade B7, A668 and various stainless
grades.
Finishes
Smaller headed and straight pins are normally supplied with a
plain, cold drawn mill finish. Larger pins which are made from
hot rolled or forged bars are machined to produce an ANSI
125 finish on the bearing diameter. Hot dip galvanized and zinc
electroplating coatings are available for corrosion protection.

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