Masonry Magazine April 1992 Page. 21
Menu-Driven Program
A menu-driven program now allows architects to choose specific details for drawing. All other features of the menu driven program, which allows architects to choose specific details, remain the same. The detail can be inserted into a drawing or converted into a drawing exchange file. A guide-specification is also tailored to each detail. The specification can be output to a printer or modified by using a word processing program.
ROUGH TERRAIN CRANES
Continued from Page 18
The boom can be elevated from the horizontal position to eighty degrees in the air. By adding the stowaway jib to the boom, a maximum boom/jib length of 135.8 feet is possible.
The jib can be offset from the main boom by 5, 25 and 45 degrees. This crane can lift a 4,250 pound load (cube of brick or block), at a seventy foot radius, with the boom fully extended to 93.6 feet. With a 42 foot jib installed, a 4,400 pound load can be lifted to a height of 130 feet, 12 to 13 floors. And, it not only can lift these loads in these configurations but swing them 360 degrees.
The crane can be set on its outriggers for maximum lift capacity or it can make lifts while on its tires, for a pick and carry application. It's roadable with highway speeds up to 31 mph. The cranes have spring suspensions, making them more comfortable for the operator while transporting the crane.
DeChellis points to numerous reasons why he prefers the rough terrain crane. He says that one crane can supply enough brick or block and mortar to keep 16 to 20 brick layers working with little or no holdup time. This includes buildings up to 12 stories high. This is in comparison to a rough-terrain forklift that can supply 12 to 14 bricklayers at a maximum of five to six stories, according to DeChellis.
DeChellis bases the number of bricklayers the handling equipment can supply by the productivity of each man. His bricklayers can each lay 500 to 525 bricks or 200 to 250 blocks daily.
One materials hoist can supply 16 bricklayers, if it is used by his people exclusively. "The problem we have run into on some projects is that other tradespeople need to use the same materials hoist and that cuts down on our production efficiency per man. It also reduces the number of bricklayers that can be supplied (timely) with brick and mortar," says DeChellis.
Another feature of the crane is its extraordinary boom reach. The superior reach enables the contractor to set up the crane at one location on the project. From this one location the crane can supply the bricklayers all the brick and mortar needed. "It [the crane] is not like forklifts that are must always be on the go. It takes a lot of time for driving forklifts
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MASONRY-MARCH/APRIL, 1992 21