ASME B30.26-2010 pdf – Rigging Hardware.
This Chapter applies to compression hardware, including forged wire rope clips and wedge sockets.
SECTION 26-3.1: TYPES, MATERIALS, AND ASSEMBLY
26-3.1.1 Types
(a) Wire rope clip types covered are U-bolt and double saddle (see Fig. 26-3.1.1-1).
(b) Wedge sockets (see Fig. 26-3.1.1-2).
(c) Compression hardware other than those detailed in this Chapter shall be used only in accordance with recommendations of the manufacturer or a qualified person.
26-3.1.2 Materials
(a) Wire rope clip materials shall be of sufficient strength such that failure of the wire rope will occur before failure of the wire rope clip at the temperatures that the manufacturer has specified for use. Saddles shall be forged steel.
(b) Wedge socket materials shall be of sufficient strength such that failure of the wire rope will occur before failure of the wedge socket at the temperatures that the manufacturer has specified for use.
26-3.1.3 Assembly — Wire Rope CLips
(a) Before installing a wire rope clip on plastic coated or plastic impregnated wire rope, consult the wire rope clip manufacturer, wire rope manufacturer, or a qualified person.
(b) For U-bolt clips used to create end terminations, the saddle shall be placed on the live end of the wire rope, with the U-bolt on the dead-end side (see Fig. 26-3.1.1-1).
(c) At least the minimum number of clips as recommended by the manufacturer or a qualified person shall be used.
(d) The spacing and turn-back should be as recommended by the manufacturer or a qualified person.
(e) The wire rope clip shall be tightened to the torque recommended by the manufacturer or a qualified person.
(f) After assembly, the connection shall be loaded to at least the expected working load. After unloading, wire rope clips shall then be retightened to the torque recommended by the manufacturer or a qualified person.
26-3.1.4 Assembly — Wedge Sockets
(a) The wedge socket shall be assembled as recommended by the manufacturer or a qualified person.
(b) Before installing a wedge socket on plastic coated or plastic impregnated wire rope, consult the wedge socket manufacturer, wire rope manufacturer, or a qualified person.
(c) The live end of the wire rope in the wedge socket cavity shall be in alignment with the socket’s pin (see Fig. 26-3.1.1-2).
(d) The assembler shall match the proper wedge with the socket for the wire rope to be installed.
NOTE: Wedges shall not be interchanged between different manufacturers’ sockets or models.
(e) The length of the dead-end tail of the wire rope shall be as required by the manufacturer or a qualified person.
‘ft) The dead-end tail of the wire rope extending beyond the wedge socket shall be secured in a manner recommended by the wedge socket manufacturer or a qualified person (see Fig. 26-3,1.1-2).
‘g) The dead end of the wire rope shall not be secured to the live end of the wire rope such that it restricts the movement of the live end (see Fig. 26-3.1.1-2).
(ii) After assembly, the connection shall be loaded to fully seat the wedge before use.
SECTION 26-3.2: DESIGN FACTOR
Due to the nature of the design and use, wire rope clips and wedge sockets do not have a conventional design factor. Wire rope clips and wedge sockets shall be designed to have an 80% minimum connection efficiency based on the wire rope published minimum breaking force with which they are used.
SECTION 26-3.3: RATED LOADS
The rated load for wire rope assemblies using compression hardware is based on the following factors:
(a) wire rope minimum breaking force
(b) 80% minimum connection efficiency
(c) design factor of the wire rope application.