Salient Characteristics - Highline Docks.pdf

Specifications

High Line Dock

03 May 2024

1. Scope

This specification document addresses the purchase of high line docks for Tyndall Air Force Base, Florida.

1.1. Background

Tyndall Air Force Base requires the purchase of two high line docks to provide base and tenant unit deployment capabilities.

2. Requirements

2.1. General

This requirement is for the purchase of two (2) high line docks. Assembly/installation will be provided by the supplier. Installation and assembly is required.

2.2. Specifications and Characteristics

2.2.1. Description

Each high line dock shall be a free-standing, self-supporting metal frame capable of holding six wide edge leading (WEL) or five narrow edge leading (NEL) 463L pallets on a conveyor system. Each 463L pallet is 88 inches by 108 inches and shall be stored in either orientation. The stop-to-stop dimension shall be minimum 48 feet. The 463L pallet has a capacity of 10,355 pounds. The high line dock shall be used to build-up and breakdown pallet trains where multiple 463L pallets are attached together for shipment of long items. The highline docks shall also be used to store, stage, and transfer 463L pallets and pallet trains.

2.2.2. Dimensions

The fixed frame shall consist of four center length center sections and two end length end sections connected end to end. The frame shall be 9 feet 4 inches + 2 inches wide. Frame sections shall be modular and interchangeable.

2.2.3. Support Frame

Each center section shall be supported by a minimum of two support frames. The end sections shall have three support frames; one on each end and one near the middle of the section. The extra support frame under the end section shall withstand loading forces at the forklift interface.

Two sections can be supported by a single support frame. Support frames shall be adjustable to provide a minimum conveyor height range of 44 to 53 inches above the ground. Each support leg shall have a base plate. Each support frame shall have a minimum of two base plates. Support frames shall be braced both laterally and longitudinally.

2.2.4. Base Plates

Base plates shall have a minimum contact surface of 12 inches by 12 inches. Base plates shall be larger than the contact area by a minimum of 1 inch on each edge. The edge shall be bent at a 15 degree angle so the base plate does not catch if scooted across the ground.

2.2.5. Capacity

The minimum capacity of the highline dock shall be 80,000 pounds. In addition each center shall have a minimum capacity of 10,355 pounds and each end section shall have a minimum capacity of 12,500 pounds. The system shall withstand static loads plus dynamic loading, during build-up operations when loads are lowered by forklift or crane at creep speed, with no permanent deformation. The system shall also withstand dynamic loading during transfer of pallets to and from a K-loader.

2.2.6. Conveyor

The conveyor shall consist of four sections of gravity roller conveyor, each with a minimum 6 inches between frames. Rollers shall be minimum 2.5-inch diameter, light-oiled bearings, spaced on 6 inches centers, positioned a minimum of 0.25 inches above the frame, with a minimum capacity of 550 pounds each. Bearings shall be shielded or sealed. Heavy-duty rollers with a minimum capacity of 1100 pounds shall be provided on both ends of the highline, between frame sections, and on both sides of the tine cutouts. Roller frames shall be steel and a minimum of 4 inches high. Centerline spacing of the roller sections across the width shall match K-loader roller spacing. Side guides shall be minimum 6-inch x 4-inch x 0.37-inch structural metal angle. Dock will allow a pallet centered between the guide rails to be pushed from one end to the other end without hitting either guide rail.

2.2.7. Pallet Stops

Both ends of the conveyor shall have a set of pallet stops consisting of four spring-loaded metal stops (one per conveyor section) capable of preventing a fully-loaded 463L pallet moving at 30 feet per minute from rolling off the high line dock. When pallets are being transferred to the high line dock the force of the pallet hitting the back of the pallet stop shall push the stop down to its fully retracted position. Once the pallet is no longer in contact with the stop, the stop shall raise to the fully raised position. Each set of stops shall be linked together and operated by a handle.

Handles shall be located on both sides of the conveyor and a handle extension shall be provided to provide leverage with the basic handle height below the top of the adjacent side guide.

2.2.8. Forklift Interfaces

Forklift interfaces shall be provided at each end of the conveyor and on both sides of both end sections. All types of 10k forklifts (standard and all-terrain by all manufacturers used by the military) shall be able to pick up and set down fully-loaded 463L pallets at all forklift interfaces.

Roller frames at forklift interfaces shall be guarded to prevent tines from snagging on or lifting the frames. Side guides shall have openings with removable covers to allow fork tine access.

2.2.9. K-Loader Interfaces

K-loader Interfaces - Both ends of the conveyor shall interface with both types of K-loaders (60k and 25k) for pallet transfer between the highline dock and the K-loader conveyor.

2.2.10. Decking

Open decking shall be provided between roller frames and between roller frames and side guides. Decking shall securely support a 300-pound person. Decking shall be interlocked to provide a minimum of 0.50 inch lip overlap if it shifts to the limits of movement. No exposed sharp edges shall be on the upper side of the decking for safety. Open decking shall be welded to the decking frame. Decking shall not be bolted to the decking frame. Decking shall be continuous for each section.

2.2.11. Collapsible Catwalks

Collapsible catwalks shall be installed along both sides of the high line dock. The catwalks shall raise and lower by frame section (center section, end section, etc.). The catwalk shall be minimum 18 inches wide and shall have decking conforming to paragraph 2.2.10. Catwalks and their supports shall be capable of being raised and lowered by one person in a safe manner. The catwalks shall not interfere with forklift access to sides of the high line dock or the forklift interfaces when lowered. When raised, the catwalks shall provide a stable, safe surface for personnel. Handrails shall be detachable to allow forklift access. Handrails shall be a single welded piece, shall be made of aluminum, shall lock in place when engaged, and shall not create pinch points where adjacent handrails interface.

2.2.12. Ladder

Two ladders shall be provided, one for each side of the high line dock. The ladders shall be capable of being installed on any center section. The ladder handrails shall extend to the top of the catwalk handrails. There shall be a self-closing gate or sliding opening in the catwalk handrail to allow access and provide a safety handrail.

3. Warranty

3.1. Vendor will provide One Year warranty on both high line docks to include parts and components.

3.2. Vendor will promptly expedite warranted parts to 325th Logistics Readiness Squadron.

3.3. Warranty start date will commence upon completed delivery and installation.

4. Installation and Delivery Address

4.1. Vendor will provide carrier/installer tracking information and contact the 325th Logistics Readiness Squadron Air Transportation Function (ATF) for preferred date and time of delivery/installation no later than on week prior to shipment.

4.2. The Air Transportation Function contact information will be MSgt Ahmad Butler Comm 850-283-9397 or email ahmad.butler@us.af.mil.

4.3. Installation location will be determined prior to submitting purchase from the ATF.