Lifts Dock Lift
Specification 11 13 00
Section 11 13 00
Part 1 – GENERAL
Related Documents: Provisions established within
General and Supplementary Conditions of the Contract,
Division 1 – General Requirements and Drawings are
collectively applicable to this Section.
Cast In Place Concrete: [Concrete Pit]
Metal Fabrications: [Perimeter guard rails and
inserts.] [Dock slab and door protection angles.]
Electrical: [Connections to dock equipment.]
This section describes the requirements for providing
a dock scissor lift as shown on the Drawing and specified as
Concrete work for dock lift(s) as specified in Part 3
Compliance with ANSI MHI (Material Handling
General: Submit in accordance with section 01 33 00.
Product data: Submit product data for the dock
Shop Drawings: Submit drawings indicating fabrication
and erection of dock equipment including plans, elevations
and large scale details.
Maintenance Data: Submit manufacturer’s maintenance
and service data, including address and telephone number of
nearest authorized service representative.
Operating Manuals: Furnish operating and maintenance
manuals and advise Owner on use and maintenance of
Dock lift Standard: Comply with applicable
requirements of ANSI, MH29.1, (“Safety Standard for
Industrial Scissor Lifts”) for construction and operation of
Electrical: All electrical components and the entire
controller assembly shall be Underwriters Laboratory listed.
Structural Rigidity: The scissor leg assembly shall
be of structural tube construction for maximum rigidity.
Manufacturer’s standard form in which the
manufacturer agrees to repair or replace lift components
that fail in materials or workmanship within specified
Warranty for the Structural Assembly: 10 years from
date of shipment from the manufacturer.
Warranty for the Hydraulic Assembly: 2 years from the
date of shipment from the manufacturer.
Part 2 – PRODUCTS
Manufactures: Subject to compliance with
requirements, provide products by one of the following:
Dock Lifts (scissor lifts):
2.2 Dock Lifts
General: Provide manufacturer’s standard hydraulic dock
lift of capacity, size and construction indicated,
consisting of a safety tread steel platform with bevel toe
guards on all four sides (or 3” vertical toe clearance
between platform and the floor on top of ground units),
steel tube scissor legs, lifetime lubricated bearings and a
hydraulic operating system with controls, safety devices and
Type: Provide stationary single scissor type hydraulic dock
lift for permanent, recessed installation in a preformed
concrete pit at location indicated (or permanent top of
ground installation on a concrete pad at location
Rated Capacity: Provide lifting capacity of not less than
______ lb. with ______ lb axle load at the ends and ______
lb. axle load at the sides.
Vertical Travel: Provide maximum vertical travel of 58
Travel Speed: Provide a nominal raising speed of _____ fpm.
Construction: Fabricate lift from structural steel shapes
rigidly welded and reinforced for maximum strength, safety
and stability. Design assembly to withstand deformation
during both operating and stored phases of service. Provide
mounting brackets for ease of installation.
1. Platform: Fabricate platform
from heavy steel plate with beveled steel toe guards on all
four sides to comply with MH29.1 (or 3” vertical toe
clearance between platform and the floor on top of ground
units to comply with MH29.1). Provide matching hinged
throw-over bridges with retention chains and snaps where
indicated and removable handrails with safety chains.
a. Platform Surface:
Nonskid, safety tread deck plate
b. Platform Size:
______inches wide by ______ inches long
2. Hinged Bridge: Provide hinged
throw over bridge, heavy duty piano type hinge welded to toe
guard at the end of platform, complete with lifting/
retaining chain with snap.
a. Bridge material:
Nonskid, safety tread plate.
b. Bridge size: ______
inches wide by ______ inches long
3. Scissor Mechanism: Fabricate leg
members from heavy duty formed steel tubes to provide
maximum strength and rigidity.
4. Cylinders: Equip lift with no
less than two heavy duty machine grade cylinders with
mechanical internal stops and return lines from breather
vents to the reservoir. Cylinder rods shall be chrome plated
and polished. The cylinders shall be equipped with flow
controls to prevent free fall in compliance with MH29.1.
5. Bearings: Equip lift with
lifetime lubricated bearings for minimum maintenance.
6. Hydraulic Power Unit:
Manufacturer’s standard self contained remotely located
assembly consisting of a steel reservoir, UL listed motor,
high pressure gear pump and valve manifold with pressure
compensated flow control, down solenoid, check valve and
7. Electrical Controls: Constant
pressure UP and Down pushbutton. NEMA 12 UL listed control
box with magnetic motor starter with 3 pole adjustable
overloads, 24 Volt 4 amp fused secondary control transformer
and the entire control box assembly, not just components,
shall be labeled as UL listed.
8. Safety Devices: Provide
Manufacturer’s standard safety devices as follows:
a. Removable handrails
constructed 42” high with midrail and 4” kick plate.
standard safety maintenance support in compliance with
c. Pit mounted units
shall be equipped with 8” bevel toe guards and have a
minimum 2” black and yellow marking along the lower edge of
the toe guards.
d. Top of ground units
shall have a minimum of 3” vertical toe clearance between
the platform and the floor when fully lowered.
9. Paint Finish: Manufacturer shall
fully prime the entire unit, apply enamel paint and bake
cure the final finish.
Part 3 –
Dock Lift Installation
Coordinate forming recessed pit for dock lift to
ensure that all dimensions conform to the requirements for
the specified size and model dock lift.
Attach the dock lift securely, according to
manufacturer’s written instructions.
Adjust And Clean
Make all necessary adjustments for safe, efficient
operation of the dock lift.
After installation, restore all marred or abraded
surfaces to original condition.