Furnishing and complete turnkey installation of Vertical Reciprocating Conveyor including supply of all materials and labor. All workmanship shall be performed in a first class manner.
Lift contractor is required to perform the work of this section as specified herein. The work shall include:
B. Related work specified elsewhere
The contractor shall be required to coordinate the related work of other sections with the work of this section where applicable to ensure safe responsible workmanship and expeditious performance.
C. Work not included
D. Quality Assurance
Equipment shall be designed, installed and guarded in accordance with ASME/ANSI B20.1 Safety Code for Conveyors and Related Equipment (current edition), National Electric Code, OSHA codes, and State & Local Codes where applicable
E. Submittal Details
Vertical Reciprocating Conveyor shall be Model RJS as manufactured by Giant Lift Equipment Manufacturing Company, Inc, 185 Lafayette Road, North Hampton, NH 03862 (phone 800-52-GIANT, fax 603-964-9263) or approved equal by a manufacturer with not less than ten (10) years successful experience and qualified in the design and fabrication of Vertical Reciprocating Conveyor model quoted. Bidders quoting alternate manufacturers must submit complete manufacturers literature and specifications not less than 10 days prior to bid date. Owner or the architect as an agent of the owner reserves the right to reject any bid using alternate manufacturers.
The lift contractor in conjunction with the manufacturer shall warrant the equipment against defects and workmanship for a period of one year from the date of successful completion.
The warranty itself is not intended to take the place of normal maintenance service, nor shall it be construed to mean that the lift contractor is required to provide free of charge service for periodic lubrication or adjustment due to normal use. The lift contractor is not required to provide free of charge repair arising in whole or in part due to abuse, misuse, alterations, acts of god, improper power supply or lack of an established proper maintenance program which shall be the responsibility of the owner.
The lift contractor must make available to the owner a comprehensive safety maintenance program at additional cost to facilitate optimal safe performance and proper function of the equipment.
H. Application: Material only - no personnel
I. Vertical Reciprocating Conveyor design data
All final engineering shall be of computer aided engineering design. The Vertical Reciprocating Conveyor framework and carriage platform shall consist of ASTM structural steel only. No formed steel shall be used.
The main framework shall consist of a structural steel back frame and integral mast uprights with a base frame to form a self-supporting rigid structure requiring sway bracing only. Framework shall be engineered proportionate to capacity and resistance to twist and deflection. Manufacturer shall engineer the frame in sections to facilitate shipment and installation by including pre-aligned precision splice joints. Frame sections shall be fully assembled at the factory to ensure intended joint quality and broken down for shipment as needed. No straddle design using a single beam per platform side shall be accepted.
Carriage deck shall be supported underneath with structural steel support arms sized by the manufacturer to be structurally sound and resist permanent deflection. The platform deck shall be a minimum of 1/4" thick hot rolled plate electrically welded to support arms.
Carriage support arms with computer designed wheel center dimensions utilize machined cold rolled steel axles and four hard alloy flanged guide wheels equipped with press fit sealed roller bearings for precision unified guidance within framework upright channels. Platform also to be equipped with a side thrust roller device for unbalanced loads consisting of four anti-friction bearing load rollers installed behind the carriage backplate perpendicular to the guide wheels to transmit unbalanced forces to the rails and keep the carriage level.
Raising and lowering of the carriage shall be provided by one solid heavy duty single acting positive displacement type turned ground and polished steel ram. Ram shall be manufactured by the Vertical Reciprocating Conveyor manufacturer, not a third party sub and shall include both stabilizing and stop rings. The ram casing shall be cold drawn seamless type of uniform thickness with an externally fitted bronze gland nut. Packing type to be inverted V-type stacked in a stuffing box to accommodate pressure surges. The stuffing box shall be so designed to allow gland nut to be adjusted and the packing to be replaced externally without removing the ram from the cylinder. Flow valve coupled to piston to provide positive limited controlled flow under lowering or failure in the hydraulic system.
Lifting force shall be through two single strand, hardened alloy, ANSI roller chains. Chains attached at one end at outer edges of lifting platform to provide extra loading stability and are mounted over sealed ball bearing chain load rollers carried in an equalizing ram cross head. Chains are attached at the other end to the piston utilizing adjustable chain anchor bolts through solid steel anchor blocks.
N. Power unit
The power unit shall consist of panelized motor, pump, reservoir tank and shall be mounted inside the back of the lower frame unless otherwise specified as remote.
O. Falling Platform Safety Device
Carriage platform to be equipped with a Falling Platform Safety Device mounted on lifting platform, self-generating type cams with machined, hardened serrated teeth which rapidly engage the frame uprights holding the platform carriage should the lifting chains become slack for any reason. Each lifting chain shall have a falling platform safety cam independent from each other. Vertical Reciprocating Conveyor manufacturers quoting models without a Falling Platform Safety Device will be rejected.
Control panel to be designed, assembled and bench tested by an employee of the Vertical Reciprocating Conveyor manufacturer - no third party subcontract. Control panel to be internally pre-wired to a terminal strip which corresponds with the diagram provided. Control panel to be shipped loose and to be field installed near customers disconnect per NEC code and shall be enclosed in a continuous hinged NEMA 12 UL labeled cabinet. Panel to include motor starter with auxiliary contact and adjustable thermal overload relay. Overload to have test, automatic reset and manual reset settings. Control panel to include step down transformer for secondary control circuit.
Controls shall be self-maintained and include push-button stations, one per landing to provide full call and send capability. Push-button stations shall be shipped loose to be field installed outside of the landing enclosure guarding in a location so they can not be actuated by a person on the platform. Push-button stations shall include red emergency stop mushroom cap operators that must be manually reset at the location where the stop was initiated in order to resume operation.
Q. Landing Enclosure Guarding
All landings shall be guarded to at least 7' high on all contiguous sides with material capable of rejecting a 2" diameter sphere. Access points to be guarded with Electro-mechanical interlocked gates. The electrical function of the interlock shall render all controls inoperable when any gate is open. The mechanical function of the interlock shall prevent the gate from being opened unless the platform is present at that level.
All equipment supplied shall be furnished with one coat of oxide primer and one coat of manufacturers standard finish enamel as selected by the architect.
S. Safety Signage
Vinyl self-adhesive signs shall be provided which read "Riding the conveyor is dangerous & strictly forbidden to all personnel". The signs shall be safety yellow background and be printed in red ink for high visibility. A minimum of one sign on the carriage platform and one at each point of access shall be provided. It shall be the owners responsibility to maintain proper signage throughout the life of the equipment.
Installation shall be professionally performed by an installer approved by the manufacturer having not less than 5 years of experience installing Vertical Reciprocating Conveyor's and similar equipment. Installer shall have visited the job site prior to commencing work to check job conditions. Installer shall follow the manufacturers instructions for proper installation of the equipment and safety enclosures and shall verify that the equipment is properly installed and guarded per ANSI/ASME B20.1 code to ensure safe efficient operation. Installer shall functionally test the operation of Vertical Reciprocating Conveyor and gate interlocks upon completion.
Only trained personnel shall be permitted to operate the conveyor. Installer shall provide one brief, but comprehensive training session for the owner and/or the owners representatives. It is the responsibility of the owner to provide similar training to any potential operators of the equipment.
It is the responsibility of the owner to put in place an established maintenance program to ensure safe operation of the equipment and the protection of personnel. All maintenance must be performed by qualified personnel. Maintenance safety check list is to be supplied by a qualified installer at the time of completed installation.