ZCN102-App C- VRC (REV1).pdf

APPENDIX C

FOR

A VERTICAL RECIPROCATING CONVEYOR

AT

CANNON AIR FORCE BASE, NEW MEXICO

BUILDING 160

CSN: ZCN102

DATE: 17 JANUARY 2023

REVISION 1: 6 MARCH 2023

PREPARED BY:

James F. Rowland

JAMES F. ROWLAND

PROJECT ENGINEER

AFLCMC/EZPAE

Brad Thompson Brad Thompson

REVIEWER

AFLCMC/EZPAE

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Cannon AFB, NM - App C – Page i

Table of Contents

1. SCOPE

2. APPLICABLE DOCUMENTS

3. REQUIREMENTS

3.1. SYSTEM DESCRIPTION

3.1.1. PERFORMANCE AND PHYSICAL CHARACTERISTICS

3.1.1.1. INTERFACE

3.1.1.2. CAPACITY

3.1.1.3. LIFT PLATFORM/CARRIAGE (REV1)

3.1.1.4. LIFTING/LOWERING SPEED

3.1.1.5. LIFT HEIGHT

3.1.1.6. TRAVEL LIMIT SWITCH

3.1.1.7. APPROACH RAMP

3.1.1.8. MECHANICAL LIFT

3.1.1.8.1. LIFTING AND LOWERING

3.1.1.8.2. TRAVEL ACTAVACTION

3.1.1.8.3. OVERLOAD/JAM PROTECTION

3.1.1.8.4. CHAIN FAILURE

3.1.1.8.5. FAIL-SAFE BRAKING

3.1.1.9. HYDRAULIC LIFT

3.1.1.9.1. HYDRAULICS

3.1.1.10. SUPPORT COLUMNS

3.1.1.11. DEFLECTION UNDER LOAD

3.1.1.12. SAFETY FEATURES

3.1.1.12.1. SAFETY CAMS

3.1.1.12.2. SAFETY ENCLOSURES

3.1.1.12.3. SAFETY GATES

3.1.1.12.4. SIGNS

3.1.2. ELECTRICAL CHARACTERISTICS

3.1.2.1. POWER FAILURE

3.1.2.2. MOTORS

3.1.2.3. CONTROLS

3.1.2.4. QUICK DISCONNECT (REV1)

4. QUALITY ASSURANCE PROVISIONS

4.1. INSPECTIONS

4.2. TESTS

4.3. CERTIFICATIONS

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Cannon AFB, NM - App C – Page 1

1. SCOPE

This appendix establishes the minimum performance, design, fabrication, installation and test requirements for a vertical reciprocating conveyor system for Building 160 at Cannon AFB, NM. The work shall be completed in accordance with this appendix, the cover purchase description (PD), and Air Force (AF) Drawing ZCN102-01. This appendix covers all equipment, materials, and labor necessary to complete installation of the system.

2. APPLICABLE DOCUMENTS

Applicable documents shall be in accordance with Section 2 of the Cover PD.

3. REQUIREMENTS

3.1. SYSTEM DESCRIPTION

A mechanical or hydraulic vertical reciprocating conveyor (VRC) shall be installed to interface with the mezzanine specified in Appendix A. The VRC shall be located as shown on Air Force (AF) Drawing ZCN102-01. The VRC will be used to transport items between the ground floor and the mezzanine.

3.1.1. PERFORMANCE AND PHYSICAL CHARACTERISTICS

3.1.1.1. INTERFACE

The Contractor shall ensure that the VRC shall interface with the mezzanine and all system components to allow for a smooth transition of material between operating levels. The horizontal gap between the VRC carriage and the mezzanine floor shall be minimized and not exceed 1-inch. The vertical gap shall be less than 1/4-inch between the VRC platform height and the mezzanine floor height.

3.1.1.2. CAPACITY

The VRC shall have a load capacity of 1,000 pounds to full lift height. Overload protection shall be provided which shall prevent damage to the system if the VRC carriage is loaded to more than 1,150 pounds (105% of the rated capacity.)

3.1.1.3. LIFT PLATFORM/CARRIAGE (REV1)

Cannon AFB, NM - App C – Page 2

The VRC lift platform or carriage (herein called carriage) shall be steel deck plate. Handrails shall be provided on the non-accessible sides and be designed and constructed in accordance with OSHA 1910.23. The rails shall be either the 2-rail or 3-rail type. The top rail shall be 42 inches above the carriage deck plate. The rails shall be a minimum 1-1/4 inch, schedule 40 steel tubing. A kick plate shall be provided on the non-accessible sides. The kick plate shall be minimum 4-inches high with no more than 1/4-inch clearance between the carriage deck plate and the bottom of the kick plate. The kick plate shall be minimum 14-gauge steel and shall be securely fastened to the deck plate or rails. Safety chains with snap hooks shall be provided on the accessible sides of the VRC carriage. The carriage shall be a nominal 54 inch deep by 54 inch wide.

3.1.1.4. LIFTING/LOWERING SPEED

The VRC shall have a minimum lifting and lowering speed of 20 feet per minute (fpm).

3.1.1.5. LIFT HEIGHT

The VRC shall have an appropriate lift height to interface with the mezzanine specified in Appendix A.

3.1.1.6. TRAVEL LIMIT SWITCH

The VRC shall be equipped with an adjustable positive mechanical stop or electrically controlled limit switch to limit the upward travel of the VRC carriage assuring positive leveling with the mezzanine deck. While descending to the lower level the VRC shall slow and stop smoothly and quietly preventing damage to aircraft parts, the VRC, and the floor.

3.1.1.7. APPROACH RAMP

A metal approach ramp shall be provided at the lower level for ease of loading and off-loading pallet jacks and carts. The gap between the approach ramp and carriage deck shall not exceed 1/2-inch. The ramp shall be anchored to the floor with expansion anchor bolts. The anchors shall be a minimum of 1/2-inch diameter and shall extend a minimum of 3-3/4 inches into the concrete floor.

3.1.1.8. MECHANICAL LIFT

3.1.1.8.1. LIFTING AND LOWERING

Cannon AFB, NM - App C – Page 3

The lifting and lowering of the VRC carriage shall be provided by lift chains and sprockets on a common shaft powered by a helical gear reducer assembly.

3.1.1.8.2. TRAVEL ACTAVACTION

Carriage travel shall begin by depressing the up or down button, which shall activate the motor reducer in the proper direction and release the brake. As the shaft and sprockets rotate, the lift chains shall travel up or down moving the carriage until it trips the limit switch at the desired level. At this point the motor shall shut off and the brake shall engage.

3.1.1.8.3. OVERLOAD/JAM PROTECTION

In the event of excessive current draw, an overload relay shall shut down the unit whenever the motor is working beyond the normal load requirements.

3.1.1.8.4. CHAIN FAILURE

In the event of a chain failure the lift shall shut down.

3.1.1.8.5. FAIL-SAFE BRAKING

Fail-safe braking shall be provided by a spring set disc brake, which shall release only when the motor is powered-up. In the event of a power failure, the brake shall automatically engage.

3.1.1.9. HYDRAULIC LIFT

If a hydraulic lift is used the raising and lowering of the VRC carriage shall be provided by dual cylinders suitably mounted on the unit. To minimize cylinder stroke and wear, the VRC shall have a minimum 4 to 1 ratio of carriage movement to cylinder stroke.

3.1.1.9.1. HYDRAULICS

The hydraulics shall be of sufficient capacity to lift and lower the VRC carriage at its maximum capacity. The lifting system shall provide for smooth lifting and lowering of the load.

Provisions shall be made to protect the hydraulic system. An adjustable pressure relief overload valve shall open when pressure exceeds 105 percent of the maximum pressure required to lift a 1,000 pound load to full elevation. Hydraulic valves, cylinders, and motors shall have a means for preventing oil and

Cannon AFB, NM - App C – Page 4 fluid from dripping or running onto the floor and electrical components.

3.1.1.10. SUPPORT COLUMNS

The VRC shall have a minimum of two 4-inch wide support columns.

3.1.1.11. DEFLECTION UNDER LOAD

When fully loaded, no portion of the VRC or approach ramp shall exhibit plastic (permanent) deformation.

3.1.1.12. SAFETY FEATURES

The Contractor shall provide the following safety features for the VRC.

3.1.1.12.1. SAFETY CAMS

Dual safety cams shall be mounted on the carriage and connected directly to the lifting wire ropes, cables or chains. In the event of cable or chain failure, the uncontrolled descent shall be limited to a maximum of 4 inches by the dual cams or other positive mechanical means.

3.1.1.12.2. SAFETY ENCLOSURES

A wire-type cage shall be installed to completely enclose all sides of the VRC upper and lower levels. The safety enclosure shall conform to OSHA 1910.212. The enclosures shall be of a size such that it will reject any object 1/2 inch in diameter or larger. One continuous enclosure that encompasses the VRC to a minimum of 7 feet above the second level shall be installed.

3.1.1.12.3. SAFETY GATES

The safety enclosure shall have safety gates at both levels on the access side of the VRC for loading and off-loading materiel as shown on AF Drawing ZCN102-01. The gates shall be electrically and mechanically interlocked with carriage movement and thus, gates shall be prevented from being opened when the carriage is in motion. The VRC shall not move or operate unless both gates are in the closed position. The interlock shall allow the gates to be opened only when the carriage is at the same level as the gate. Two sets of two swinging gates at the mezzanine level and the floor level shall access the carriage.

The gates at each level shall provide an opening, which is a

Cannon AFB, NM - App C – Page 5 minimum of 80 inches high, and 60 inches in width to facilitate the loading and off-loading of materiel. Gates shall be capable of being manually secured.

3.1.1.12.4. SIGNS

Safety signs shall clearly state the capacity of the VRC and that the VRC shall not be used for transporting personnel.

Signs shall be clearly visible (lettering shall be at least 2 inches high) and securely fastened to all points of access and at each VRC operational control point.

3.1.2. ELECTRICAL CHARACTERISTICS

3.1.2.1. POWER FAILURE

In the case of a power failure, the VRC shall stop instantly and the carriage shall remain in position with no more than an 8-inch drift over a minimum 24-hour period.

3.1.2.2. MOTORS

The motor shall be sized for the full rated load and shall operate on the electrical characteristics as they exist at the site. Gear reducers (if provided) shall not leak oil, and shall be of equal horsepower design to the mating motor. The motor shall be equipped with thermal overload devices in accordance with NFPA 70-99, Article 430, Part C. The motor shall not restart automatically when the overload device is reset.

3.1.2.3. CONTROLS

There shall be two sets of controls: one located at the bottom or lower level of the VRC and one located at the mezzanine level. The controls shall be located near the gates on each level. Each control set shall operate the upward and downward movement of the VRC carriage. The controls shall be the momentary contact push-button type and each with an emergency stop button. When the up button is pushed and released, the carriage shall travel to the upper level position and stop automatically, remaining there. When the down button is pushed and released, the carriage shall travel to the lower position and stop automatically, remaining there. The emergency stop button shall stop all movement of the VRC carriage in both upward and downward directions. Once the emergency stop devices are reset the VRC carriage shall not start automatically but only start when the up or down buttons are pushed and released.

While the VRC carriage is in motion, pushing any button, other

Cannon AFB, NM - App C – Page 6 than the emergency stop button, shall have no effect on the VRC travel.

3.1.2.4. QUICK DISCONNECT (REV1)

The contractor shall ensure that a quick disconnect is installed at the VRC. The disconnect shall be capable of being locked out.

4. QUALITY ASSURANCE PROVISIONS

4.1. INSPECTIONS

The system shall be inspected to verify that it meets all the requirements of Sections 1, 2, and 3 of this appendix and the Cover PD. These inspections shall be completed as part of the system checkout test and again as a part of the quality conformance test.

4.2. TESTS

The following tests shall be performed on the system as part of the system checkout test and again as a part of the quality conformance test.

No. Paragraph Description

1. 3.1.1.1. Load the VRC with a 1,000-pound load. Raise the load to the upper level. If the VRC carriage does not stop within 1/4 inch of the mezzanine floor level then the system shall fail the test.

2. 3.1.1.4. Mark off 2 feet and 12 feet (or other span totaling 10 feet) on the VRC support column or adjacent wall. Load the VRC with 1,000 pounds, raise and lower the load a minimum of five times. Record the time it takes the lift to travel 10 feet. If the average recorded time exceeds 30 seconds then the system shall fail the test. Repeat this test recording the time to lower the lift 10 feet. If the average recorded time exceeds 30 seconds then the system shall fail the test.

Cannon AFB, NM - App C – Page 7

3. 3.1.1.11. Load the VRC with 1,000 pounds, raise and lower the load a minimum of five times.

Inspect the system for damage (e.g., fluid leakage, tube rupture). If the system is damaged, or if there is plastic deformation then the system shall fail the test.

4. 3.1.1.12.3. Load the VRC with 1,000 pounds. Start raising the VRC carriage and while in operation try opening the gates. If the lower or upper gate can be opened when the VRC carriage is in motion then the system shall fail the test.

5. 3.1.1.12.3. Load the VRC with 1,000 pounds on the lower level. Try to open the gate on the upper level while the lift is stationary. Then put the carriage at the upper level and try to open the lower gate while the lift is stationary at the upper level. If either gate can be opened when the carriage is not located at that level then the system shall fail the test.

6. 3.1.1.12.3. Load the VRC with 1,000 pounds on the lower level. Try to put the load in motion with the lower gate open. Then put the carriage at the upper level and try to put the carriage in motion with the upper level gate open. If the VRC can be put into motion and is operational while a gate is open then the system shall fail the test.

7. 3.1.2.1. Load the VRC with 1,000 pounds. While raising or lowering the load shut off the power. If the VRC does not stop instantly or if the carriage does not remain in position (with no more than an 8-inch drift over a 24-hour period) then the system shall fail the test.

Cannon AFB, NM - App C – Page 8

8. 3.1.2.3. Load the VRC with 1,000 pounds. While raising or lowering the load use the emergency stop controls then reset the controls and start the system. Repeat this test a minimum of five times while lifting and lowering. If the carriage does not stop, or after resetting the emergency stop control the VRC automatically starts before pushing the up or down buttons, then the system shall fail the test.

9. 3.1.2.3. Load the VRC with 1,000 pounds. Start raising the VRC carriage from the lower level and while in motion push the down button. If the VRC does not continue to rise and stops or starts down then the system shall fail the test.

4.3. CERTIFICATIONS

The contractor shall provide certification that the following requirements have been met. All certifications shall be provided in accordance with the contract data requirement list.

No. Paragraph Certifications

1. 3.1.1.9.1. An adjustable pressure relief overload valve shall open when pressure exceeds 105 percent of the maximum pressure required to lift a 1,000 pound load to full elevation. Only required if hydraulic lift is provided.

2. 3.1.1.12.1. In the event of chain or cable failure, the uncontrolled descent shall be limited to a maximum of 4-inches by the cams or other positive mechanical means.

Cannon AFB, NM - App C – Page 9

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TECHNICAL PROPOSAL QUESTIONNAIRE

FOR A

Cannon AFB, NM - Vertical Reciprocating Conveyor, App C – TPQ Page 1 of 5

VERTICAL RECIPROCATING CONVEYOR

Solicitation Number: FA8604- -R- Project Title: Storage Aid System Base: Cannon AFB, NM CSN: ZCN102 Appendix C, Vertical Reciprocating Conveyor, 17 January 2023

The Offeror shall complete this questionnaire. All entries to this questionnaire shall be typed. Answers will be used to determine the Offeror's understanding of the requirements and acceptability of the proposed equipment. Please attach product literature/cut sheets for all equipment detailed in this questionnaire and attach any exceptions to the Purchase Description Appendix as detailed below.

Vertical Reciprocating Conveyor Manufacturer and model number:

Paragraph Characteristics

3.1. Is the VRC mechanical or hydraulic? ______________

Is the VRC a straddle or cantilever type lift?

3.1.1.2. The VRC will have a load capacity of ____________

pounds to full lift height.

3.1.1.3. Will the VRC lift platform or carriage (herein

called carriage) be steel deck plate?

YES NO

3.1.1.3. Will the VRC carriage have handrails and kick

plates on the non-accessible sides? YES NO

3.1.1.3. The carriage is _________ feet wide by ________

feet deep.

3.1.1.4. The VRC will have a minimum lifting and lowering

speed of __________ feet per minute (fpm).

3.1.1.5. Will the VRC interface with the mezzanine as

specified? YES NO

Solicitation Number: FA8604- -R-

Cannon AFB, NM - Vertical Reciprocating Conveyor, App C – TPQ Page 2 of 5

3.1.1.6. Will the VRC be equipped with adjustable positive

stops or limit switches? YES NO

3.1.1.7. Will a metal approach ramp be provided at the

lower level and have a gap between the approach ramp and carriage deck 1/2-inch or less?

3.1.1.11. When fully loaded will the VRC and approach ramp

prevent plastic deformation?

3.1.1.9.1. Will the VRC have overload protection if the VRC

carriage is loaded to more than 105% of the rated capacity? YES NO

3.1.1.12.1. Will dual safety cams or other positive mechanical means be provided to limit an uncontrolled descent to a maximum of 4 inches? YES NO

3.1.1.12.2. Will a safety enclosure be installed to completely enclose all sides of the VRC upper and lower levels? YES NO

3.1.1.12.3. Will safety enclosure gates be electrically and

mechanically interlocked with carriage movement to prevent opening gates when the carriage is in motion? YES NO

3.1.1.12.3. Will the interlocks prevent the VRC from movement when a gate is open? YES NO

3.1.1.12.3. Will the interlocks prevent a gate from being

opened when the carriage is at a different level?

3.1.1.12.3. The gates will provide an opening, which is

_________ inches high and is _______ inches wide.

Cannon AFB, NM - Vertical Reciprocating Conveyor, App C – TPQ Page 3

3.1.1.12.4. Will safety signs be provided that clearly states that the VRC shall not be used for transporting personnel? YES NO

3.1.2.1. Will the VRC stop instantly during a power failure

and remain in position with an 8-inch or less drift over 24 hours? YES NO

3.1.2.1. Will the motor be able to operate on the

electrical characteristics as they exist at the site?

3.1.2.1. Will the motor be equipped with thermal overload

devices and not restart automatically until the overload device is reset? YES NO

3.1.2.3. Will two sets of controls, one located at the

lower level and one located at the upper level be provided? YES NO

3.1.2.3. Will the VRC controls each operate the upward and

downward movement of the VRC carriage?

3.1.2.3. Will each control set be the momentary contact

push-button type and each with an emergency stop button? YES NO

3.1.2.3. Will the emergency stop button stop all movement

of the VRC carriage in both upward and downward directions? YES NO

3.1.2.3. Once the emergency stop devices are reset, will

the VRC carriage be unable to start automatically until the up or down buttons are pushed and released?

Cannon AFB, NM - Vertical Reciprocating Conveyor, App C – TPQ Page 4

3.1.2.3. While the VRC carriage is in motion, will the

system prevent the controls, other than the emergency stop control, from effecting the VRC travel? YES NO

Cannon AFB, NM - Vertical Reciprocating Conveyor, App C – TPQ Page 5

EXCEPTIONS

Attach any exceptions taken to the Purchase Description Appendix. Please outline those concerns in detail. Your exceptions will be reviewed to determine acceptability.

Are exceptions taken? YES NO

Number of pages attached: ____________________________________