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Hoisting Mechanisms Print E-mail

  TYPES OF HOISTING MECHANISMS

TO LIFT THE PANELS INTO PLACE

The panels of our smaller domes can be placed using a steel scaffold rigged with wheels and winch.  The panel is then held in place with a prop support until the seam concrete cures.  A rope is put through the steel mesh at each of the three points and ties back on itself and is secured to a lifting spike.  American Ingenuity loans you the lifting spike for a $100 deposit.  If the spike is returned to us during the specified four month period and it is in good condition, your $100 deposit is returned.  See below for info on the lifting spike.  Once the panel is in place, the ropes are untied.  

The panels for the larger domes (36’ thru 48’) may be best placed using a crane that is capable of lifting 300-400 pounds, 25 feet up & 25 feet out. A rope is put through the steel mesh at each of the three points and ties back on itself and is secured to a lifting spike.  Once the panel is in place, the ropes are untied and you continue using the same process to lift the other panels into place. 

This link, Radial, explains the radial assembly method for the smaller domes 22', 27' and 30'.   This link,  Rib, explains the temporary wooden rib system assembly method for the larger domes, 36', 40', 45', 48' and 60'.

With a four-person work crew, use of a temporary wooden rib system & proper bracing of the panels, two rows of panels of a 48’ dome can be placed in about a day of crane time.  In most cases, total crane rental time will vary from about 10 hours for a smaller dome to 16 hours for a 48’ dome.  On this link, Kit Assembly Consultant, we give you a recap on the equipment needed to assemble the building kit and an estimate on the Consultant's hours and needed worker hours to erect the kit.  To view these recaps scroll down the page to the yellow and blue boxes.  These links, Construction Overview and Willis Shell Construction will show you the assembly steps to erect the dome building kit. 

Monthly rentals on transverse lifts also called Boom Lifts, Horizontal Boom Fork Lifts, Roofing Lifts, Shooters are available from National Rental Chains like US Rentals, Hertz Equipment Rentals, United Rentals, etc.  The companies can be found in the telephone book.

Our web site has over 150 pages of detailed information including an extensive FAQ (frequently asked questions and their answers).  We look forward to answering your questions as you research which housing kit is best for you and your family.  Just to clarify, none of our staff is on commission....we are simply here to answer your questions as you analyze our dome housing kit which is the latest evolution in housing technology.

 PANEL LIFTING SPIKES

To make the lifting of the panels easier, you can place a $100 deposit and the Panel Lifting Spikes will be shipped with your kit.   They are used to lift the triangular dome panels and the riser panels. 

The following information is in A.I.'s Assembly Manual and includes sketches.

When preparing a panel for lifting, first bend the reinforcing wire mesh up almost in a vertical position to make the insertion of the lifting spikes easier.  Also having the mesh bent up will allow the panel to be placed without entanglement of the adjacent panel mesh. 

The lifting spikes are to be inserted at the midway locations along the panel's edges. 

Push or hammered them into the EPS foam just under the concrete layer.  They should be parallel to the outer surface of the concrete. 

For safety reasons it is important that the lifting spikes are placed within 6" of the center of the panel side. 

The spikes should be inserted so that the attached chain links can most easily to be threaded through the reinforcing wire mesh. 

Enlarge the opening in the reinforcing wire mesh so that the attached chain can go toward the center of the concrete side without obstruction.       

Connected chains that will support 3 times the weight of the panel to the spike chain.  We recommend that you use a closed loop connector that can not release if there is no tension on the chain. 

Connect the 3 chains together so that the convergence point will be at a distance from the panel concrete surface equal to half the distance (length) of a panel side.  The chains should converge with about 90 degrees (square) between the two chains when viewed perpendicular.

Adjustments to the length of the 3 chains will allow you to tilt a panel to be better aligned with the location where it will be placed.

Some deviation in the spike placement and the convergence point height is allowable if you take in consideration how the forces are affected and follow all cautions listed below.

If the chains converge close to the panel the chains will be pulling more against each other and less in the direction intended for lifting the panel.  Reducing the convergence height to ¼ of the distance between spikes doubles the chain tension. 

Increasing the convergence height causes the panel to hang lower, reducing the height you can lift the panel.  Also when any chain is near perpendicular to the panel there is a serious risk of the spike being pulled out while lifting.    

CAUTION

Because there are numerous things that could allow the panel to fall while lifting.  In addition to the chains and their connection, a sudden jerk from the lifting device, slack in the lifting cable and human errors and other things can cause the panel to fall.

The only way to assure safety is to assume that the panel can fall at any time.  Anytime a panel is lifted Never allow anyone under the panel or within range of its possible impact.

Even after a panel is set in place and supported movement of other panels or supports could cause it to fall. 

Don't consider a panel secure until it has been C-ringed and concreted on two sides to adjacent secure panels and all of the concrete had time to adequately harden.

Not being full time safety conscious could result in fatality consequences.

Once a panel has been placed into its position at the dome shell, the lifting irons can easily be pulled out of the panel's edge with a couple of strong outward jerks to the 3-link chain tail at the end of the lifting irons.

 

 

 

 

 

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