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a
AISC
- American Institute of Steel Construction. Organization that
regulates steel construction practices and safety measures. It is
very important that your mezzanine manufacturer conforms to all AISC
regulations and specifications
Anchors Used to attach the foot plates to the floor.
Generally 4 to 4-1/2 long x 3/4 to 5/8 wide . Holes are drilled in
the flooring and the anchors are set in place.
Approval Drawings
- CAD generated blueprints showing all dimensions, systems details, and
orientation with related scope of work. Approval drawings must be
checked for accuracy and signed. This directs the manufacturer as which
way to proceed.
ASTM -
American Society for Testing and Materials. Organization
that puts forth stringent testing policy for most materials. All
steel non fabricated steel components must conform to ASTM regulations,
demand it!
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b
Bar Joist An open web framing component
used to span large areas. Also Open
Web Bar Joist.
Bar Grating Steel or fiberglass
manufactured to produce an open grid load carrying deck. Typically used
on mezzanines to accommodate air flow and light from one level to
another. Standard type used on mezzanines is (1 x 1/8).
Base Plate Also referred to as a
foot plate. A steel plate which is welded to
the bottom of a column to help support the column and distribute the
Floor Load.
B-Deck Also referred to as roof deck
or corrugated steel. Corrugated steel
used as a deck substructure under plywood, floor plate and concrete.
General made of 18 or 20 gauge galvanized steel material.
Beam Wide
flange structural member identified by depth & weight, or sheet steel
bent to increase structural integrity.
BOCA-
Building Officials & Code Administrators International. The
national building code standard for public
access mezzanine systems.
Building Codes Requirements for
construction that typically only effects handrail and stair design as
related to mezzanines. Various codes are UBC,
SBCC and BOCA.
OSHA is a federal standard which many times is referred to
incorrectly as a code.
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c
CABO - Council
of American Building Officials
Calculations Mathematical computations
which prove the integrity of a structural design. In most cases the are
sealed by a Professional Engineer registered in the state where the
project is located. Typically required when applying for a building
permit in a mid to high seismic zone. Also called
Seismic Calculations
Catwalk A narrow walkway, often elevated. A mezzanine catwalk
system is most often used with shelving to create an elevated walkway
between the shelving units. Also referred to as
Shelving or Rack
Supported Mezzanines
C-Channel - A beam that has a C shaped
profile. Generally used to describe
Cold Rolled Steel however, Structural
Steel is also made into C-Channels.
Clear Height The dimension from the
floor to the underside of the mezzanine framing.
Clear Span - The distance between mezzanine
columns. Generally longer on
structural steel mezzanines than on any
other type. Also referred to as Column
Spacing
Cold Rolled Steel Sheet steel that
is bent into C-Channel Beams to increase
structural integrity. Weight, Load
Capacity and Clear Spans are decreased
with this design. Cold Rolled Steel Mezzanines are generally
cheaper to produce and install and have quicker production times than
Structural Steel Mezzanines.
Column Square tube steel used to support mezzanine framing at
a desired elevation. Standard column would be 5 x 5, 6x 6, 7 x 7
ect.
Column Load - The weight applied to each
column in a floor supported mezzanine system calculated in pounds per
square foot (PSF) Column Load divided into the size of the
base plate will give the
Floor Load
Column Spacing - The distance measured
between one column and another. Also referred to as
Clear Span
Corral Gate- A
gate designed for the upper level of a mezzanine to handle large pallet
loads quickly and safely. The corral gate is designed to pivot and
provide an integral railing at the mezzanines edge to prevent
accidental falls.
Corrugated Steel- Sheet steel that is
bent and formed to increase strength, creating a "wave" profile.
Corrugated steel generally has a galvanized finish. Also called
b-deck or roof deck
C-Section 9, 11, or 12 gauge flat steel
which is brake formed into the shape of a letter C and is 12, 16" or
20" deep. Often produces a more cost effective beam on
small mezzanines but not practical on large systems. See also
Cold Rolled Steel Mezzanines ,
C-Channel
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d
Dead Load Capacity - The weight of
the mezzanine resting on floor columns divided by
the total square footage of the mezzanine floor. This number plus
the Live Load Capacity divided into
the columns will give the column load
Decking The traffic or walking surface of a mezzanine,
typically plywood, floor/diamond plate, specialty wood panels, bar
grating and sometimes concrete. See also
Bar Grating, B-Deck, xxxx
Deck Height
The dimension from the floor to the top of the mezzanine deck. See
also Clear Height
Deflection -
Applied to mezzanines it is the measured amount of sag that a framing
member exhibits under stress of the design load.
Diamond Plate
Material of choice for heavy loads and forklift traffic. Impervious to
liquids, providing outstanding wear resistance, with embossed pattern to
reduce slippage.
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e
External Stairs A stairway that
runs parallel or perpendicular to the mezzanine perimeter, existing
entirely on the outside of the mezzanine perimeter. An
intermediate landing is generally
required to access the mezzanine from external stairways. See
also Internal Stairs.
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f
Floor Load - The total weight applied on a
floor by a mezzanine system. Calculated in pounds per square inch
(PSI) per base plate or
foot plate. See also Column Load,
Load Capacity,
Live Load Capacity and
Dead Load Capacity
Floor Plate 12 gauge steel in either a
diamond pattern or smooth. Used as a deck surface over roof deck. It is
typically used for durability in high traffic areas.
Foot Plate -
Also base plate
Footings
Typically a reinforced area of concrete designed to support the point
load of a mezzanine column.
Free Standing
A mezzanine system which is not connected to the building structure in
any manner and is self supported.
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g
Guardrail The railing system that protects
one from falling off a mezzanine structure. It is often referred to as
handrail. The most common are (2) & (3) rail systems.
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h
Handrail The continuous welded rail on a stair unit.
Hot-Dipped
Galvanized The most effective method used to apply a zinc coating
to steel. The zinc coating provides barrier and cathodic protection to
the underlying steel surface. The preferred choice to protect steel from
corrosion.
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i
Internal Stairs A stairway that
runs inside or through the mezzanine floor. Most cases a landing is not
needed when you have an internal stairway.
Intermediate Landing A landing
halfway between the bottom and the top of the stairs. Intermediate
landings are required by code anytime the mezzanine deck height
exceeds 12.
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j
Joist The framing member that substantiates the majority of
the framing and runs between the girders. Joists are spaced to
accommodate load and deflection criteria.
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k
Kickplate Sometimes referred to as toe
plate. This formed angle is used to trim off the open edge of the
decking material and serve as a barrier to stop material from sliding or
being pushed off the mezzanine under the guardrail.
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l
Landing Provided on staircases to allow entrance when stairs
run parallel to the mezzanine or in tight spaces when stairs are
required to turn corners.
Lift Out Gate-
A gate designed to be completely removed to create access to mezzanine.
Generally made out of the same material as the mezzanine handrail.
Live Load Capacity - The weight
capacity of a mezzanine system calculated in pounds per square foot
(PSF). Common capacities are 110 PSF, 125 PSF, 150 PSF. The
live load plus the dead load divided
into the columns will give the Column Load.
Load Capacity - How much weight a
mezzanine system or particular mezzanine component can hold.
AISC requires at least a 1.65 built in safety
factor. See also Live Load Capacity
and Dead Load Capacity
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m
Material Lift Elevator like lift
designed to take materials from one level of the mezzanine to the
other. Designed to carry materials only, not people.
Mezzanine - A
mezzanine is a partial story within a building, built between two
permanent original stories. Mezzanines are generally free standing and
can be relocated.
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n
NSPE
National Society for Professional Engineers.
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o
Open Web Bar Joist An open web
framing component used to span large areas. Also
Bar Joist.
O.S.B. Oriented Strand Board. A composite wood product used
for mezzanine flooring.
OSHA
- Occupational Safety & Health Administration is the regulatory body
that dictates workplace safety and health procedures and policies.
OSHA standards are the basis for every national
building code in existence. OSHA is
very active in mezzanine construction and will enforce the removal or
repair of non-OSHA approved fabrication. Make sure your mezzanine
manufacturer is well versed in OSHA regulations.
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p
PE Seal The seal of a registered professional engineer that is
applied to final drawings and calculations. This service general carries
an additional charge and is typically required by local building
departments if a permit for the project is required.
Plywood Can
be Ύ T&G, Ύ Squared Edge, or Ύ Fire Treated Underlayment Grade and is
used for an economical walking/storage surface over roof deck.
Point Load A
specific amount of weight being applied to a specific area. Often
referred to a concentrated load. Point loads can be mezzanine columns,
shelving legs, wheels from
a pallet jack or
storage tanks, ect.
Powder Coat The
process of applying a powder material to the metal and then heating or
baking the powder to the metal to create a sealed paint finish.
PSF (Pounds
Per Square Foot) measurement used to determine the mezzanines ability to
support weight.
PSI (Pounds
Per Square Inch) measurement used to determine the mezzanines ability
to support weight.
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q
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r
Resin Board A wood board manufactured
with glue and wood under pressure to form a product which is designed
for applications that require wheel traffic. This board is typical
sealed to prevent moisture absorption.
Roof Deck Often referred to as
B-Deck or Corrugated
Steel. Corrugated steel used as a deck substructure under plywood,
floor plate, and concrete. It is typical made from a galvanized
material.
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s
SBCC
- Southern Building Code Congress International Regional
building code that regulated construction
in certain zones of the USA
Seismic - In terms of mezzanines it is the ability of the
mezzanine to withstand movement caused by earthquakes, earth vibrations
or earth movements.
Seismic Calculations
Mathematical computations which prove the integrity of a structural
design. In most cases the are sealed by a Professional Engineer
registered in the state where the project is located. Typically required
when applying for a building permit in a mid to high seismic zone.
Also referred to as calculations
Shelving or Rack
Supported Mezzanine - A mezzanine system that is created by
building catwalks and access pass-thrus through
shelving and pallet rack systems, allowing pedestrian access to upper
levels of storage.
Slide Gate Generally
4, 5 or 6 feet in length. The gate is designed to slide along the edge
of the mezzanine to allow access to the mezzanine. It can be opened
either manually or electrical power.
Span The
distance of a framing member between columns. Bar joist framing allows
the maximum span when designing a mezzanine.
Structural Steel -
Swing Gate -
Generally designed with a spring loaded hinge that will return to its
original position when not held open. Most cases the gate is constructed
with the same material used for the mezzanine rail system.
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t
T&G Tongue and Grooved. Method applied to plywood edges which
allows two pieces of wood to interlock with one another.
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u
UBC
- Uniform Building Code Regional
building code that regulated construction
in certain zones of the USA
Uniform Live Load The amount of
weight that a mezzanine system is designed to carry. This is designated
as PSF (pounds per square foot). Standard design capacity for storage on
a mezzanine is 125 PSF.
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v
VRC
Vertical Reciprocating Conveyor. Also referred to as a material
lift (see material lift).
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w
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x
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y
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z
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