A large slewing bearing is connected with 80 rolled 1-5/8" SAE Grade 8 Bolts to the substructure of a large piece of equipment. The substructure flange that the bearing is mounted to is slightly tapered. Of the 80 bolts, 6 exhibit a gap between the nut and the washer at one extreme of the nut...
I am trying to find out where to look to determine if the grout used at the foundation of a pillar type jib crane is satisfactory or not. The crane rated 2 ton with a 36" x 36" base plate sitting on a 2-1/2" thick, 39" x 39" grout slab. Cracks are visible along the thickness of the grout slab at...
I am trying to find out where to look to determine if the grout used at the foundation of a pillar type jib crane is satisfactory or not. The crane rated 2 ton with a 36" x 36" base plate sitting on a 2-1/2" thick, 39" x 39" grout slab. Cracks are visible along the thickness of the grout slab at...
I am trying to find a replacement for a Monorail Crane 90 degree horizontal curve. The girder beam is a S Type, I Beam (non-patented track). I have not been able to find any suppliers or catalogs other than for patented track or smaller smaller sized S Type I Beams (4" - 6" depth associated with...
I am currently working with a Pillar Type Jib Crane. It appears that its cantilevered S-Beam was damaged at some point in time by a load that was applied to the end of the beam and at the bottom flange, perpendicular to the length of the beam. The beam has yielded from this torsional force and...
I am a crane and rigging engineer seeking information on a subject to which there seems to be little knowledge. I am searching for data relating to wire rope failure due to a sudden release of load. Particularly, I'm looking for any data that suggests a threshold of EIPS 6x36 IWRC or EIPS 6x19...
