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Essential ingredients of a proper mezzanine lift

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Rider Mezzanine Access Lifts:
How to get personnel and material from ground level to mezzanine level quickly, safely and efficiently.
Scissors lifts have been moving men and material from ground level to higher elevations for more than 60 years. They offer a distinct advantage over vertical reciprocating conveyors because people ride industrial scissors lifts along with the materials that they are moving. This greatly enhances the utility of the mezzanines. The cost is very competitive with VRC’s and the installation can offer significant savings because industrial scissors lifts come from the factory fully assembled instead of in kit form like elevators and some vertical reciprocating conveyors so they avoid costly field assembly by elevator installers. Only the gates and enclosures need to be assembled on site.

There are three main features that make industrial scissors lifts different from other kinds of lifts:

1.  Scissor lifts are fully assembled at the factory and not field assembled from kits.

2.  Scissors lifts have no external guide rails and/or pulley mechanisms to entangle riders. All the stability and lifting is provided by the scissors lift mechanism beneath the platform.

3.  Rider scissors lifts use constant pressure push buttons which means the rider operator is in constant control of the lift movement.

Governing codes:
The International Building Code for 2015 was printed June of 2014 and has clarified matters greatly. Chapter 30 Elevators and Conveying Systems, Section 3001.2 Referenced standards, sites ANSI MH29.1 Safety Requirements for Industrial Scissors Lifts. This clears up any confusion with other codes such as ASME17.1 for elevators, ASME B20.1 for vertical reciprocating conveyors or ASME90.1 for other types of scissors lifts. Virtually all states, counties and municipal agencies accept the references sited by the International Building Code because they respect the rigorous (multi-year and multi-constituency) review process conducted by the ICC (International Code Counsel).

Note that the MH29.1:2012 was the standard reviewed and accepted and that this version differs substantially from previous versions.

Also note that other codes such as those governing the height of guardrails or enclosures on mezzanines or upper floors must be reviewed in conjunction with the industrial scissors lift code. Enclosure heights at upper levels may vary in different jurisdictions.

The essential ingredients of a proper mezzanine lift are as follows:

1. A properly configured industrial scissor lift. The platform should be equipped with 42” high guardrails with mid rails and 4” toe plates. The lift platform should have electrically interlocked gates that prevent lift movement unless the lift gates are closed. The interlocked gates are not required by code, but will be a common sense addition required by most municipalities and inspectors. The unit should have proximity switches or limit switches for each level. The control shall be a constant pressure pushbutton that the rider operator must keep depressed to maintain movement of the lift (the use of call/send buttons are not allowed with riders on the lift). The rideable material lift should also be equipped with an emergency down valve on the power unit to lower the lift in case of power failure. Again this is not a code requirement, but most municipalities or inspectors will require it.

2.  A smooth mezzanine fascia. The entire surface of the mezzanine adjacent to the lift from ground level to the top of the guardrail on the upper level must be equipped with a smooth face to eliminate shear points. This may be wallboard, polycarbonate GP sheets or fine mesh. Interlocked doors & windows are allowed.

3.  An enclosure system. The sides not adjacent to the mezzanine must be enclosed from ground level to the height of the highest guardrail in the fully raised position. The guardrail on the mezzanine and the access gates on the enclosure must be electrically interlocked to prevent lift movement when the gates or doors are opened and mechanically locked so that t they can not be opened unless the lift platform is present. The gap between the platform and the mezzanine should be 1”. The gap between the platform and the enclosure on all other sides should be approximately 3” to 4”. This gap requirement is not by code, but another common sense requirement required by most inspectors.

 

How to choose the correct mezzanine access lift
This white paper guides you through how to select the right lift for access in an efficient, economical, and safe manner.

Custom Lift Capabilities
WE DO THE HARD STUFF! 
Because of our continuous R & D programs, we are continually pushing the boundaries of lift table performance. We go well beyond “clean sheet” custom design. Many of these developments can be applied to other customer applications:
• Position control systems with guaranteed accuracy of +_ .030” accuracy
• Simpler, less expensive position control with +_ 1/8” accuracy
• 200 foot per minute down speeds (when the customer observed it, he asked us to slow it down)
• Multi-lift synchronization on a single power unit
• “Intrinsically Safe” wiring as a low cost alternative to some explosion proof applications
• Customer control interfaces with sophisticated programmable controllers
• Super large – Super high capacity – Super unusual custom platform and lift configurations

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Advance Lifts is a leading lift manufacturer providing a complete line of dock lifts, lift tables, scissor lifts, turntables, dumpers and stretchers.
Advance Lifts was founded in 1974 and quickly became the leading scissor lift, industrial turntables, and dock lift manufacturer in the country. We have maintained this position through innovative design, quick deliveries and superior service. Over the years our product lines expanded to include production lift tables, tilters, turntables, dumpers, mezzanine lifts, work access platform lifts and stretch wrappers.
Our modern 120,000 sq. ft. facility in St. Charles, Illinois houses state of the art equipment and a well trained group of engineers and production personnel, who are dedicated to providing our customers outstanding products.
We have an in house UL listed panel shop and are ISO 9001 certified. Our goal is to make the entire process of buying, installing, using and servicing of our products as easy and trouble free as possible for each and every one of our customers.

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