DESIGN A/E NOTE - GUIDE SPECIFICATION CONVENTIONS
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Rev 19JUN09 j:\Projects\Active\com-deca_design_criteria_revisions-04071\Guide Specifications\TJG Innformation
SECTION 11160
LOADING DOCK EQUIPMENT
PART 1 - GENERAL
1.1 SUMMARY
1.1.1. Section Includes
a. Dock bumpers.
b. Dock levelers.
c. Truck restraints.
d. Dock seals.
e. Metal hoods.
1.2 DEFINITIONS
a. Operating Range: Maximum amount of travel above and below the loading dock level.
1.3 SUBMITTALS
1.3.1. Product Data
a. Include construction details, material descriptions, rated capacities, operating characteristics, furnished specialties, accessories, dimensions of individual components and profiles, and finishes.
1.3.2. Shop Drawings
a. Show fabrication and installation details. Include plans, elevations, sections, details, and attachments to other work.
1.3.3. Maintenance Data
a. For loading dock equipment to include in maintenance manuals.
1.3.4. Warranties
a. Special warranties specified in this Section.
1.3.5. Guarantees
a. Special guarantees specified in this Section.
1.3.6. Submittal List:
Reference Submittal Item Quantity Action
1.3.1 Product Data X R
1.3.2 Shop Drawings X R
1.3.3 Maintenance Data X I
1.3.4 Warranties X I
1.3.5 Guarantees X I
X Submit quantity specified in Division 1 Section “Administrative Requirements.”
R Review each submittal, mark to indicate action taken, and return.
I Submittal is for information or record purposes only. No action will be taken.
1.4 QUALITY ASSURANCE
1.4.1. Installer Qualifications
a. Manufacturer's authorized representative who is trained and approved for installation of units required for this Project.
b. Maintenance Proximity: Not more than two hours' normal travel time from Installer's place of business to Project site.
1.4.2. Source Limitations
a. Obtain all loading dock equipment through one source from a single manufacturer.
1.5 DELIVERY, STORAGE, AND HANDLING
1.5.1. Storage, And Handling
a. Store and handle dock seals in a manner to avoid significant or permanent damage to fabric or frame.
b. Comply with manufacturer's written instructions for minimum and maximum temperature requirements for storage.
1.6 PROJECT CONDITIONS
Field Measurements: Indicate measurements on Shop Drawings.
1.7 COORDINATION
1.7.1. Coordinate Installation Of Anchorages For Loading Dock Equipment
a. Furnish setting drawings, templates, and directions for installing anchorages, including sleeves, concrete inserts, anchor bolts, and items with integral anchors, that are to be embedded in concrete or masonry. Deliver such items to Project site in time for installation.
1.7.2. Recessed Loading Dock Equipment
a. Coordinate size and location of pits to ensure proper clearances and operation of equipment.
1.7.3. Electrical Requirements
a. Coordinate wiring requirements and current characteristics of loading dock equipment with building electrical system. See Division16 Sections.
1.8 WARRANTY
1.8.1. Special Warranty for Dock Levelers
a. Manufacturer agrees, in writing, to repair or replace dock-leveler components that fail in materials or workmanship within specified warranty period.
b. Failures include, but are not limited to, the following:
(1) Structural failures including cracked or broken structural support members and load-bearing welds.
(2) Deck plate failures including cracked plate or permanent deformation in excess of 1/4 inch between deck supports.
(3) Hydraulic system failures including failure of hydraulic seals and cylinders.
c. Warranty Period: 10 years from date of Substantial Completion.
d. Warranty shall be for unlimited usage of the leveler for the specified rated capacity at an average rate of 8 trucks per day over the term of the warranty.
1.8.2. Special Warranty for Truck Restraints
a. Manufacturer agrees, in writing, to repair or replace truck restraints that fail in materials or workmanship, including all material, labor, tax, and freight for period of 7 years from date of shipment.
1.9 GUARANTEE
Special Guarantee for Truck Restraints: Manufacturer agrees, in writing, to a 24-month money back guarantee of satisfactory truck restraint performance as determined by the Contracting Officer.
PART 2 - PRODUCTS
2.1 MANUFACTURERS
BasisofDesign Products: To establish the significant qualities related to type, function, dimension, inservice performance, physical properties, appearance, and other characteristics for purposes of evaluating comparable products of other manufacturers, a specific manufacturer's product is named and accompanied by the words "basis of design," including make or model number or other designation. Subject to compliance with requirements, provide either the named products or equal products.
2.2 MATERIALS
2.2.1. Steel Plates, Shapes, and Bars
a. ASTM36/A36M.
2.2.2. Rolled-Steel Floor Plate
a. ASTMA786/A786M, rolled from steel plate complying with ASTMA572/A572M, Grade55.
2.2.3. Steel Tubing
a. ASTMA500, cold formed.
2.2.4. Welding Rods and Bare Electrodes
a. Select according to AWS specifications for metal alloy welded.
2.3 DOCK BUMPERS
2.3.1. Laminated-Tread Bumpers
a. Fabricated from multiple, uniformly thick plies cut from fabric-reinforced rubber tires. Laminate plies under pressure on not less than two 3/4-inch- diameter, steel supporting rods that are welded at one end to 1/4-inch- thick, structural-steel end angle and secured with a nut and angle at the other end. Fabricate angles with predrilled anchor holes and sized to provide not less than 1 inch of tread plies extending beyond the face of closure angles.
b. Thickness: 4-1/2 inches.
c. Horizontal Style:
(1) 12 inches high by 15 inches long at dock levelers.
(2) 12 inches high by 24 inches long at trash platform.
2.3.2. Anchorage Devices
a. Hot-dip galvanized steel anchor bolts, nuts, washers, bolts, sleeves, cast-in-place plates, and other anchorage devices as required to fasten bumpers securely in place and to suit installation type indicated.
2.4 RECESSED DOCK LEVELERS
2.4.1. General
a. Recessed, hinged-lip-type dock levelers designed for permanent installation in concrete pits preformed in the edge of loading dock; of type, function, operation, capacity, size, and construction indicated; and complete with controls, safety devices, and accessories required.
b. Basis-of-Design Products: Rite-Hite Corporation, Rite-Hite 4000 Series, Model RHH-4086 Series.
c. Standard: Comply with MH 30.1.
d. Rated Capacity: 26,000 25,000 pounds, minimum.
e. Nominal Platform Size: 72 inches wide by 96 inches deep.
f. Platform: Not less than 1/4-inch- thick, nonskid steel plate.
g. Hinged Lip: Not less than 1/2-inch- thick, nonskid steel plate.
h. Frame: Manufacturer's standard type.
i. Finish: Galvanized.
2.4.2. Function
a. Dock levelers shall compensate for differences in height between truck bed and loading platform surface in the following manner:
(1) Vertical Travel: Provide operating range above platform level of sufficient height to enable lip to extend and clear truck bed before contact.
(a) Minimum working range of 12 inches above and 12 inches below adjoining platform.
(2) Automatic Vertical Compensation: Floating travel of ramp with lip extended and resting on truck bed shall compensate automatically for upward or downward movement of truck bed during loading and unloading.
(3) Automatic Lateral Compensation: Tilting of ramp with lip extended and resting on truck bed shall compensate automatically for canted truck beds of up to 4 inches over width of ramp.
(4) Lip Operation: Manufacturer's standard mechanism that automatically extends and supports hinged lip on ramp edge with lip resting on truck bed over dock leveler's working range, allows lip to yield under impact of incoming truck, and automatically retracts lip when truck departs.
(5) Automatic Ramp Return: Automatic return of unloaded ramp, from raised or lowered positions to stored position, level with platform, as truck departs.
2.4.3. Hydraulic Operating System
a. Electric-powered hydraulic raising and hydraulic lowering of ramp, controlled from a remotely located master control panel. Equip leveler with a packaged unit including a unitized, totally enclosed, nonventilated electric motor, pump, manifold reservoir, and valve assembly of proper size, type, and operation for capacity of leveler indicated. Include means for lowering ramp below platform level with lip retracted behind dock bumpers. Provide a hydraulic velocity fuse connected to main hydraulic cylinder to limit loaded ramp's free fall to not more than 3 inches
2.4.4. Construction
a. Fabricate dock-leveler frame, platform supports, and lip supports from structural- or formed-steel shapes. Weld platform and hinged lip to supports. Fabricate entire assembly to withstand deformation during both operating and stored phases of service. Chamfer lip edge to minimize obstructing wheels of material-handling vehicles.
(1) Hinged Lip: Full width, piano-type hinge with heavy-wall hinge tubeand greased fittings, with gussets on lip and ramp for support.
(a) Length of Lip Extension: Not less than 18 inches from ramp edge and not less than 14 inches in front of dock bumpers.
(2) Toe Guards: Equip open sides of rising ramp over range indicated with metal toe guards mounted flush with ramp edges and projecting below ramp.
(a) Toe-Guard Range: Entire upper operating range.
(b) Finish: Factory finish dock levelers after assembly and testing. Paint toe guards yellow or with yellow and black stripes to comply with ANSIZ535.1.
b. Cross-Traffic Support: Manufacturer's standard method of supporting ramp at platform level in stored position with lip retracted. Provide a means to release supports to allow ramp to descend below platform level.
c. Maintenance Strut: Integral strut to positively support ramp in up position during maintenance of dock leveler.
(1) Provide lockout-tagout capability during maintenance. Locate disconnect with other controls on master panel.
2.4.5. Accessories
a. Pit Frame: 3-by-3-by-1/4-inch galvanized steel curb angles for edge of recessed leveler pit, with 1/2-inch- diameter by 6-inch- long concrete anchors welded to angle at 6 inches o.c. Paint pit frame angles safety yellow.
b. Night Locks: Manufacturer's standard means to prevent extending lip and lowering ramp when overhead doors are locked.
c. Side and rear seals or closures to provide rodent and weather containment.
d. Interlock: Leveler will not operate while overhead door is in closed position and truck restraint is not engaged.
2.5 TRUCK RESTRAINTS
2.5.1. General
a. Manufacturer's standard device designed to engage truck's rear-impact guard and hold truck at loading dock. Restraint shall consist of an iron or steel restraining arm that raises until contacting rear-impact guard. Arm shall move vertically, automatically adjusting to varying height of truck due to loading and unloading operations.
b. Basis-of-Design Products: Rite-Hite Corporation, RHR-1000.
c. Provide a truck restraint at each recessed dock leveler.
d. Truck restraining device shall be manufactured by the same manufacturer as the dock levelers.
e. No motors shall be required to position the restraint to reach proper engagement level for variable rear impact guard heights. Position of rotating hook shall therefore be in the same position in relation to variable rear impact guard heights prior to activation.
f. Large, rotating or level vertical-rising, yellow zinc dichromate steel hook for visibility.
g. Hook arrangement shall be maintained throughout every phase of loading/unloading process, including below dock endloading.
h. Finish: Galvanized.
2.5.2. Restraining Capacity
a. Capable of restraining total gross load of 32,000 lbs without permanent deflection or distortion.
2.5.3. Operating Range
a. Capable of restraining rear-impact guards within a range from 9 to 30 inches vertically above driveway, and from 0 to 10 inches horizontally in front of dock bumpers.
2.5.4. Power Operating System
a. Manufacturer's standard wall mounted electromechanical exterior off-ground mounting position, non-hydraulic unit that does not require pit mounting that could cause a collection area for dirt and debris.
b. Restraint operates upon impact of rear impact guard of backing trailer and moves restraint carriage into correct position.
c. Restraining arm is controlled from a remotely located master control panel.
d. Interlock: Leveler will not operate while truck restraint is not engaged.
2.5.5. Caution Signs
a. Surface mounted; with black text on yellow background, and with sign copy as follows. Provide one sign each at each truck-restraint location.
(1) Exterior Sign: Copy in Forward and Reverse Text: "BACK IN OR PULL OUT ON GREEN ONLY."
(2) Interior Sign: Copy in Forward Text: "ENTER ON GREEN ONLY."
2.5.6. Light Communication System
a. Red and green illuminated signal-light sets, with lens approximately 4 inches in diameter, designed to indicate status to both dock attendant and truck driver. Equip system with connection to master control panel that includes illuminated lights indicating status of exterior signal lights. Provide signal-light set and connection to master control panel at each truck restraint location. Enclose exterior signal-light sets in steel or plastic housing with sunshade.