Page 55 - Wire Rope News & Sling Technology - December 2018

NEWS IN OUR INDUSTRY

Swage Machines & Hardware • Testing Equipment • Reeling & Coiling Machines • Parts & Service

North American Sales & Service Center

HYDRAULIC SWAGE MACHINES

C-Frame and Two-Column
15 ton – 6,000 ton capacities
*Available upgrades:
rigging arm, die lifting arm, die feeding device

DIES

We can also design/build dies to fit
other manufacturers’ machines FERRULES, SLEEVES &
SWAGING PRODUCTS
Aluminum & copper ferrules, stainless
steel sleeves, swage buttons, and more

New Orleans, LA • 504-702-1917 • sales@wiropamericas.com

Wirop_WRE_Aug2018H.indd 1 7/20/18 8:14 AM
from the Seattle Operating Group at a one-over-one-over-three rig comprised Modulift was called upon to make
Mortenson, explained that diversity of five spreaders at different levels. modifications to five of the rigging ar-
of rigging was required as the mod- Flexible solution rangements. Spencer explained that
ules varied in size; the largest mea- Sue Spencer, technical director at alterations were necessary because of
sured 10 ft. wide by 51 ft. long and Modulift, said: “Whenever Polcom obstructions caused by scaffolding. She
weighed 45,000 lbs. (approx. 20.5t). begins a new product, they ship the added: “We had to redesign the rigs so
Some modules had six lifting points equipment to site and we provide the they were much lower in height; we
and others had eight. Further, not all rig drawings as their technical part- achieved it by reducing the sling angles
of those points were in line and some ner. This type of rig is flexible and above each spreader beam and in some
modules had offset centres of gravity. nicely balanced. We could have come cases at less than a 45-degree angle be-
The heights of lift also increased as the up with a custom designed frame, but neath. We also changed the types of con-
hotel took shape, with the final storey this would have been heavier and more nection slings to the spreaders to avoid
reaching 70 ft. from street level. costly—and it would have been rigid any clashing between the slings and the
Modulift prescribed cascading rigs, rather than flexible. Also, because the beams due to lower [sling] angles.”
consisting of spreader beams, slings, customer has used our equipment on MOD 24, MOD 34, MOD 50, and
and shackles, which proved the most many module installations, they had MOD 70 spreader beams were all uti-
cost-effective below-the-hook solution. the spreader beams required in their lised during the project. The longest
For the eight-point lifts, a one-over-two- fleet. They only had to purchase a small and largest was a 30-ft.-long MOD 70,
over-four configuration was used, con- quantity of spreader beam struts.” while the smallest and shortest was a
sisting of seven spreader beams at dif- Due to site constraints encoun- MOD 24 at 5 ft. The slings were pre-
ferent levels; and for the six-point lifts, tered once the project was underway, dominantly chain slings with shorten-
ers so that the lengths could be adjust-
ed to accommodate the aforementioned
offset centres of gravity, with polyester
slings to connect to the beams for the
lower height rigs.
McCaskill pointed out that the writ-
ing, visible on the side of the modules,
identified the units by room number
within the hotel. It was also used to
communicate the sequence at which the
continued on page 57

Wire Rope News & Sling Technology December 2018 55