Estimator's Electrical Manhour Manual

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Edition: Third
Book Size: 6 x 9
Pages: 440
Edition: 3rd
Cover: Soft Bound
Author: Page

This book focuses on the man hours it takes to perform a task.  You can then multiply that number times your cost of labor. 

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Table of Contents:

Preface
The Human Factor in Estimating
Introduction

Section 1­BRANCH, SERVICE, AND FEEDER ROUGH-IN

Section Introduction
Square Boxes, Covers, and Rings
Walls, Flat Slabs, and Concrete Pan Form Construction (Concealed)
Wall and Ceiling Surfaces (Exposed)
Concrete Block, Brick or Hollow Tile Walls (Concealed)
Woodframe Construction (Concealed)
Suspended Ceiling Construction (Concealed)
Octagon and Special Boxes, Round Covers, and Rings
Flat Concrete Slab Construction (Concealed)
Concrete Pan Form Construction (Concealed)
Concrete Wall Construction (Concealed)
Concrete Block, Brick, and Hollow Tile Walls (Concealed)
Wall and Ceiling Construction (Exposed)
Wood Frame Construction (Concealed)
Suspended Ceiling Construction (Concealed)
Knockout Type Outlet Gang Boxes and Covers
Flat Concrete Slab Construction (Concealed)
Concrete Pan Form Construction (Concealed)
Concrete Wall Construction (Concealed)
Concrete Block, Brick and Hollow Tile Walls (Concealed)
Wall and Ceiling Construction (Exposed)
Wood Frame Construction (Concealed)
Suspended Ceiling Construction (Concealed)
Handy and Sectional Switch Boxes
Concrete Wall Construction (Concealed)
Concrete Block, Brick and Hollow Tile Walls (Concealed)
Wall Construction (Exposed)
Wood Frame Construction (Concealed)
S.C. Pull and Hinge Covered Boxes
Flat Concrete Slab Construction (Concealed)
Concrete Pan Form Construction (Concealed)
Concrete Wall Construction (Concealed)
Concrete Block, Brick, and Hollow Tile Walls (Concealed)
Wall and Ceiling Construction (Exposed)
Wood Frame Construction (Concealed)
Suspended Ceiling Construction (Concealed)
Rigid Steel or Aluminum Oval Conduit Bodies
Electric Metallic Tubing Oval Conduit Bodies
Plastic Conduit Oval Conduit Bodies
FS Type Threaded Cast Device Boxes
Flat Concrete Slab Construction (Concealed)
Concrete Pan Form Construction (Concealed)
Concrete Wall Construction (Concealed)
Concrete Block, Brick, and Hollow Tile Walls (Concealed)
Wall and Ceiling Construction (Exposed)
Wood Frame Construction (Concealed)
Suspended Ceiling Construction (Concealed)
FS Type Threadless Cast Device Boxes
Flat Concrete Slab Construction (Concealed)
Concrete Pan Form Construction (Concealed)
Concrete Wall Construction (Concealed)
Concrete Block, Brick, and Hollow Tile Walls (Concealed)
Wall and Ceiling Construction (Exposed)
Wood Frame Construction (Concealed)
Suspended Ceiling Construction (Concealed)
FS Type Device Box Covers
Moisture Proof Threaded Device Boxes and Covers
Vapolet and SEH Type Threaded Cast Outlet and Junction Boxes
Single and Duplex Cast Iron and Steel K.O. Type Floor Boxes
Cast Iron Junction and Gang Floor Boxes
Galvanized Rigid Steel Conduit
Underground Construction (Concealed)
Flat Concrete Slab or Concrete Pan Form Construction (Concealed)
Concrete Walls (Concealed)
Concrete Block, Brick and Hollow Tile Walls (Concealed)
Walls and Ceilings (Concealed)
Wood Frame Construction (Concealed)
Suspended Ceiling Construction (Concealed)
Equipment Connections (Exposed)
Rigid Aluminum Conduit
Underground Construction (Concealed)
Flat Concrete Slab or Concrete Pan Form Construction (Concealed)
Concrete Walls (Concealed)
Concrete Block, Brick, or Hollow Tile (Concealed)
Walls and Ceilings (Exposed)
Wood Frame Construction (Concealed)
Suspended Ceiling Construction (Concealed)
Equipment Connections (Exposed)
Plastic Conduit
Underground Construction (Concealed)
Flat Concrete Slab or Concrete Pan Form (Concealed)
Concrete Walls (Concealed)
Concrete Block, Brick, or Hollow Tile (Concealed)
Walls and Ceilings (Exposed)
Wood Frame Construction (Concealed)
Suspended Ceiling Construction (Concealed)
Equipment Connections (Exposed)
Electric Metallic Tubing (Thinwall)
Underground Construction (Concealed)
Flat Concrete Slab or Concrete Pan Form (Concealed)
Concrete Walls (Concealed)
Concrete Block, Brick or Hollow Tile (Concealed)
Walls and Ceilings (Exposed)
Wood Frame Construction (Concealed)
Suspended Ceiling Construction (Concealed)
Equipment Connections (Exposed)
Flexible Steel Conduit
Concrete Block, Brick, or Hollow Tile (Concealed)
Walls and Ceilings (Exposed)
Wood Frame Construction (Concealed)
Suspended Ceiling Construction (Concealed)
Equipment Conduit Bends in Shop and Field (Steel or Aluminum)
Cutting, Reaming, and Threading Conduit (Steel or Aluminum)
Cutting, and End Preparation of Plastic and Flexible Conduit and Electric Metallic Tubing
Thread-Ons for Steel and Aluminum Fittings
Make-Up for Electric Metallic Tubing and Plastic PVC Conduit
Make-Ups for Flexible Conduit Fittings

Section 2-BRANCH, SERVICE, AND FEEDER WIRING

Section Introduction
Branch Circuit, Size #8 and Smaller, 600-Volt, Single Conductor, Solid Copper Wire
Heights to 10 Feet
Heights to 15 Feet
Heights to 20 Feet
Heights to 25 Feet
Branch Circuit, Size #8 and Smaller, 600-Volt, Single Conductor,
Stranded Copper Wire Heights to 10 Feet
Heights to 15
Heights to 20 Feet Heights to 25 Feet
Branch Circuit, Size #8 and Smaller, 600-Volt, Single Conductor,
Solid Aluminum Wire Heights to 10 Feet
Heights to 15 Feet
Heights to 20 Feet
Heights to 25 Feet
Branch Circuit, Size #8 and Smaller, 600-Volt, Single Conductor,
Stranded Aluminum Wire
Heights to 10 Feet
Heights to 15 Feet
Heights to 20 Feet,
Heights to 25 Feet
Fixture Wiring, Single Conductor, 600-Volt, #12 and Smaller, and Solid Copper
Boiler Room Wiring, Single Conductor, 300- Volt, #8 and Smaller, Solid and
Stranded Copper
Flexible Metallic Armored Cable
Wood or Metal Frame Construction (Concealed)
Masonry Walls (Concealed)
Suspended Ceilings (Concealed)
Flat Ceilings or Walls (Exposed)
Nonmetallic Sheathed Cable
Wood or Metal Frame Construction (Concealed)
Masonry Walls (Concealed)
Suspended Ceilings (Concealed)
Flat Ceilings or Walls (Exposed)
Connectors for Flexible Metallic Armored and Nonmetallic Sheathed Cable
Low Voltage Thermostat and Lighting Control Branch Cable
Wood or Metal Frame Construction (Concealed)
Masonry Walls (Concealed)
Suspended Ceilings (Concealed)
Flat Ceilings and Walls (Exposed)
Installed in Conduit
Mineral Insulated Cable and Terminators
Concrete Slab Construction (Concealed)
Masonry Walls (Concealed)
Flat Ceilings and Walls (Exposed)
Open Truss or Bar Joist (Exposed)
Connect Equipment (Exposed)
Aluminum Sheathed Cable and Connectors
Wood or Metal Frame Construction (Concealed)
Masonry Walls (Concealed)
Suspended Ceilings (Concealed)
Flat Ceilings and Walls (Exposed)
Open Truss or Bar Joist (Exposed)
Connect Equipment (Exposed)
Service and Feeder Wiring, Size #6 and Larger, 600-Volt, Single Conductor
Stranded Copper, Rubber Insulated
Heights to 10 Feet
Heights to 15 Feet
Heights to 20 Feet
Heights to 25 Feet
Service and Feeder Wiring, Size #6 and Larger, 600-Volt, Single Conductor,
Stranded Aluminum, Rubber Insulated
Heights to 10 Feet
Heights to 15 Feet
Heights to 20 Feet
Heights to 25 Feet
Service and Feeder Wiring, Size #6 and Larger, 600-Volt, Single Conductor,
Stranded Copper, Thermoplastic Insulated
Heights to 10 Feet
Heights to 15 Feet
Heights to 20 Feet
Heights to 25
Service and Feeder Wiring, Size #6 and Larger, 600-Volts, Single Conductor, Stranded Aluminum, Thermoplastic Insulated
Heights to 10 Feet
Heights to 15 Feet
Heights to 20 Feet
Heights to 25 Feet
Wire Connectors and Lugs
Wire Vertical Riser Supports
Service and Feeder Wire Grounding Materials
Mineral Insulated Sheathed Cable, Wire Size #6 and Larger
Wood or Metal Frame Construction (Concealed)
Suspended Ceilings (Concealed)
Concrete Floor and (Concealed)
Flat Slabs and Walls (Exposed)
Masonry Walls (Concealed)
Cable Trays or Channel (Exposed)
Interlocked Armored Cable
600 Volt
5KV
15KV
Nonwatertight and Watertight Fittings for 600-Volt
Compound Fittings and Cable Splicing for 600-Volt
Compound Fittings, Potheads and Cable Splicing for 5,000-Volt
Compound Fittings, Potheads and Cable Splicing for 15,000-Volt

Section 3-WIRING DEVICES SWITCHES, OUTLETS, AND RECEPTACLES

Section Introduction
Tumbler and Tumbler Lock Type Switches
Weatherproof, Mark Time, and Thermal Switches
Door, Momentary Contact, Tumble Type Dimmer, and Rotary Dimmer Switches.
Switch and Receptacle Combinations and Duplex Receptacles
Single Nongrounding Receptacles
Single Grounding Receptacles
Miscellaneous Receptacles
Switch Receptacle, and Combination Plates
Miscellaneous Device Plates
Despard Devices
Despard Plates

Section 4 SURFACE METAL RACEWAY AND BRANCH BUSWAY

Section Introduction
Fittings and Boxes for Surface Metal Raceway
Surface Metal Raceway and Wire One Piece
Surface Metal Raceway and Multi-Outlet Assemblies Two Piece
Branch Busway 50 Amp Plug-In Type

Section 5 LIGHTING FIXTURES

Section introduction
Commercial Interior Incandescent Fixtures
Surface Mounted I-Lamp Units
Surface Mounted 2-, 3- and 4-Lamp Units
Pendant Mounted 1- and 4-Lamp Units
Pendant Mounted I-Lamp Units
Pendant Mounted 2- and 3-Lamp Units
Round Body Recessed Mounted I-Lamp Units
Square Body Recessed Mounted 1- and 2-Lamp Units
Square Body Recessed Mounted 3- and 4-Lamp Units
Porcelain and Plastic I-Lamp Units
Commercial and industrial Incandescent Exit Light Units
Industrial Interior Incandescent Fixtures
Surface Mounted Porcelain Enamel Reflector 1-Lamp Units
Vaportite Lampholder 1-Lamp Units
Explosion Proof Enclosed Lamp Holder 1-Lamp Units
Pendant Mounted Porcelain Enamel Reflector l-Lamp Units
High Bay Rigid Aluminum and Explosion Proof Reflector Lampholders
Interior Vaportite and Mercury Vapor Fixtures
Incandescent Vaportite Light Fixtures and Accessories
Mercury Vapor Separable Socket 1- and 2-Lamp Units
Mercury Vapor One Piece Socket 1- and 2-Lamp Units
Mercury Vapor Rigid 1 Lampholder with Glass Cover
Mercury Vapor Rigid Explosion Proof 1 Lamp Units
Interior Fluorescent Lighting Fixtures
Surface Mounted 1-Tube
Surface Mounted 2-Tube
Surface Mounted 3-Tube
Surface Mounted 4-Tube
Surface Mounted 6-Tube
Surface Mounted 8-Tube
Ceiling Suspended 1-Tube
Ceiling Suspended 2-Tube
Ceiling Suspended 3-Tube
Ceiling Suspended 4-Tube
Ceiling Suspended 6-Tube
Ceiling Suspended 8-Tube
Recessed Mounted I- and 2-Tube
Recessed Mounted 3- and 4-Tube
Recessed Mounted 6- and 8-Tube
Wall or Cove Mounted I- and 2-Tube
Wall or Cove Mounted 3- and 4-Tube
Wall or Cove Mounted 6- and 8-Tube
Flush Mounted Air Handling l- and 2-Tube
Flush Mounted Air Handling 3- and 4- Tube
Flush Mounted 6- and 8-Tube
Vaportite l- and 2-Tube
Vaportite 3- and 4- Tube
Vaportite 6- and 8- Tube
Class III Explosion Proof l- and 2-Tube
Class II Explosion Proof 3- and 4-Tube
Class II Explosion Proof 6- and 8-Tube
Class I Explosion Proof l- and 2-Tube
Class I Explosion Proof--3- and 4-Tube
Class I Explosion Proof--6- and 8-Tube
Fluorescent Luminous Ceiling System Conditions 1, 2 and 3
Fluorescent Luminous Ceiling System Conditions 4 and 5
Auditorium lighting
Fluorescent Tube Installation
Fluorescent Ballast and Filter Installation
Incandescent Bulb Installation
Outdoor Flood lighting

Section 6-UNDERFLOOR DUCT

Section Introduction
Floor Ducts
Standard Steel Ducts and Fittings
Standard Steel Duct Junction Boxes and Accessories
Steel Trench Duct
Steel Trench Duct Fittings
Steel Industrial Duct
Duct Wiring and Devices and Accessories
Low and High Potential Devices

Section 7-BUS DUCT

Section Introduction
Install 3-Phase, 3-Pole Copper Plug-In Type Bus Duct
Duct Heights to 10 Feet
Duct Heights to 15 Feet
Duct-Heights to 20 Feet
Duct Heights to 25 Feet
Fittings Heights to 10 Feet
Fittings Heights to 15 Feet
Fittings Heights to 20 Feet
Fittings Heights to 25 Feet
Install 3-Phase, 3-Pole Aluminum Plug-In Type Bus Duct
Duct Heights to 10 Feet
Duct Heights to 15 Feet
Duct Heights to 20 Feet
Duct Heights to 25 Feet
Fittings Heights to 10 Feet
Fittings Heights to 15 Feet
Fittings Heights to 20 Feet
Fittings Heights to 25 Feet
Fusible and Nonfusible Switches 250- or 600-Volts
Plug-In and Bolt-On Types Heights to 10 Feet
Plug-In and Bolt-On Types Heights to 15 Feet
Plug-In and Bolt-On Types Heights to 20 Feet
Plug-In Molded Case Circuit Breakers
For Heights to 10 Feet
For Heights to 15 Feet
For Heights to 20 Feet
3-Phase, 3-Pole Copper-Feeder Type Bus Duct
Duct Heights to 10 Feet
Duct Heights to 15 Feet
Duct Heights to 20 Feet
Duct Heights to 25 Feet
Fittings Heights to 10 Feet
Fitting -Heights to 15 Feet
Fittings Heights to 20 Feet
Fittings Heights to 25 Feet
3-Phase, 3-Pole Aluminum Feeder Type Bus Duct
Duct Heights to 10 Feet
Duct Heights to 15 Feet
Duct Heights to 20 Feet
Duct Heights to 25 Feet
Fittings Heights to 10 Feet
Fittings Heights to 15 Feet
Fitting Heights to 20 Feet
Fittings Heights to 25 Feet

Section 8-ELECTRIC HEATING AND VENTILATING

Section Introduction
Baseboard Convectors
Radiant Baseboards and Baseboard Accessories
Indoor Type Radiant Heat Cable
600-Volt Outside Heating Cable
Outdoor Mat Type Heating Cable
Outdoor Mat Type Heating Cable
Surface and Suspended Ceiling. Mounted, Radiant Heating Panels
Electric Floor and Wall Heaters
Recessed and Radiant Wall Heaters
Radiant and Infrared Ceiling Heaters
Radiant and Infrared Commercial Ceiling Heaters
Duct Insert Heaters
Electric Furnace
Hydronic Heater Elements
Electrostatic Air Filters and Domestic Humidifiers
Air to Air Heat Pumps
Standard Unit Heaters with Blowers
Explosion Proof Unit Heaters with Blowers
Powered Roof Ventilators
Non-Heating Blowers
Exhaust Fans
Electric Heating Controls

Section 9-PANELBOARDS AND ACCESSORIES

Section Introduction
Branch Circuit Panelboards
Standard Type
Miscellaneous Installations and Connections
Circuit Wire Connections to Spare Branches in Place
Placing Branch Units in Blank Spaces and Circuit Connections
Main Circuit Breaker or Switch Adder Manhours
Main Circuit Breaker or Switch Adder Manhours
Sub-Feeder Circuit Breaker or Switch Adder Manhours
3-Phase, 4-Wire Surface or Flush Mounted Panelboards
Distribution and Power Panelboards
Cabinet Installation
Circuit Breaker Type Branches
Circuit Breaker Type Other Sections and Main Circuit Breaker
Circuit Breaker Circuit Wire Connections to Spare Brancbes in Place
Replace Blank Spaces with Branch Units Circuit Breaker Type
Switch and Fuse Type Branches and Other Sections
Switch and Fuse Circuit Wire Connections to Spare Brancbes in Place
Replacing Blank Spaces with Branch Units and Connecting Circuits
Conductors Switch and Fuse Type
Circuit Breaker and Switch and Fuse Magnetic Starter Sections
Circuit Wire Connections to Spare Starters in Place
Placing Complete Starter Units in Blank Spaces
Cable and Lug Connectors

Section 10-SWITCHBOARDS AND ACCESSORIES

Section Introduction
Handling Low Voltage Switchboard Sections
Molded Case Circuit Breakers
Switchboard Branch Conductor Connectors
Circuit Wire Connections to Spare Branches in Place
Replacing Blank Spaces with Branch Units in Place
Main Circuit Breaker Conductor and Switchboard Busway Stub Connections
Switch and Fuse Type Branches
Branches
Circuit Wire Connections to Spare Branches in Place
Miscellaneous Switchboard Section
Conductor Terminations and Terminal Connections
Meters for Switchboards 3-Phase, 4-Wire
Replace Blank Spaces with Switch and Fuse Branch Units
Switchboard Pull Boxes

Section 11 SWITCHES, STARTERS, CONTROLS, AND GUTTERS

Section Introduction
Externally Operated Safety Switches
250-Volt Fusible and Nonfusible
600-Volt Fusible and Nonfusible
Circuit Breakers Separate and Combination Installation
Magnetic Starters
Reversing and Nonreversing
Circuit Breaker and Starter or Switch and Starter Combination
Pushbutton Stations
Manual Motor Starting Switches
1- and 2-Speed Drum Switches
Control Devices
Time Switches, Enclosed Magnetic Relays and Pressure Float Limit Switches
Reduced Voltage and Multi-Speed Starters
Auxiliary Gutters and Fittings
Junction Boxes
1- and 2-Door Terminal Cabinets
Current Transformer, Meter Test Cabinets, and Meter Troughs
Meter Service Entrance Switches and Meter Socket-Circuit Breaker Combination
Interconnecting Conductors, Split Bolt Connectors, and Lugs
Conduit Nipples for Split Bolt and Lug Connectors

Section 12-MOTOR CONTROL CENTERS

Section Introduction
Handling Motor Control Modular Units
Conductor Connections for Full Voltage, Non Reversing Modular Control Units
Class I Type A No Terminal Blocks
Class I Type B Terminal Blocks Provided
Class 1 Type C Master Terminal Block
Circuit Wire Connections to Spare Units in Place
Class I-Types A, B, & C- Terminal Blocks Provided
Conductor Connections for Class I-Type B-Modular Control Units with Terminal Blocks Provided
Full Voltage Non Reversing
Reduced Voltage Non Reversing
2-Speed-Full Voltage-Non Reversing
Accessories for Modular Control Starter
Main Lugs and Neutral Block Connections
Conductor Connections for For Voltage Non Reversing Modular Control Units with Interlocking Auxiliary Contacts
Class ll Type B-Terminal Blocks Provided
Class ll Type C-Terminal Blocks Provided
Motor Control Center Pull Boxes

Section 13-MOTOR CONTROLS AND MOTORS

Section Introduction
Motor Starting Switches for 30-Amp AC Motors
Mounting and Connecting Dial Type Speed Regulating Rheostats
Starting Compensators for 3-Phase Squirrel Induction AC Motors
30 Amp AC Magnetic Switches
3-Pole 220-Volt AC Magnetic Switches
DC Motor Switches
DC Motor Rheostats and Switches
DC Motor Switches-Starting Rheostats and Externally Operated Switches
Mounting Motors
AC 6O Cycle 3- and 2-Phase 220, 440, or 560 Volts
AC 60 Cycle Variable Speed 2- and 3-Phase 220, 440, or 550 Volts
AC 25 Cycle 2- and 3-Phase 220, 440, or 550 Volts
AC 25 Cycle-Variable Speed 3- and 2-Phase 220, 440, or 550 Volts
DC 115-330 Volt Constant Speed Shunt Series Compound Wound

Section 14-POWER TRANSFORMERS

Section Introduction
Air and Oil Cooled Transformers
60 Cycle Single Phase Primary 440 or 550 Volts Secondary
115 or 230 Volts
25 Cycle Single Phase Primary 550 Volts Secondary 115 or 230 Volts

Section 15-0UTSIDE OVERHEAD SYSTEMS

Section Introduction
Overhead Street Lighting
Poles, Standards and Accessories
Supports and Miscellaneous Service Items
Pole Setting and Pole Anchors
Guys
Cross Arms, Pins, and Secondary Racks
Stringing Wire
Aerial Cable
Grounding and Primary and Secondary Protective Devices
Overhead Street Lighting and Control Installations
Pole Mounted Distribution Line Transformers
Distribution Line Regulators and Capacitors

Section 16-OUTSIDE UNDERGROUND SYSTEMS

Section Introduction
Underground Fiber Ducts
Underground Asbestos Cement Ducts
Underground Clay Ducts
Lead Covered and Direct Burial Cable
600-Volt, Type RL Wire Cable Splices

Section 17 COMMUNICATIONS AND SIGNAL SYSTEMS

Section Introduction
Low Voltage Wire and Cable For
Control Circuits and Communication and Annunciator Systems
Control Circuits and Communication and Annunciator Systems
Control Circuits and Communication and Annunciator Systems
Sound and Shielded Instrumentation Circuits
Sound and Shielded Instrumentation Circuits
SoID1d and Shielded Instrumentation Circuits
So Instruments lD1d and Shielded Instrumentation Circuits
Shielded Pair Cables for Sound and Instrumentation
Unshielded Pair Cables for Intercom and Sound
Coaxial, Closed Circuit and TV Antenna Audio Cables
Wire and Cable Terminal Connections
Telephones and Burglar and Centralized Radio Systems
Clock and Program Systems
Fire Alarm and Hospital Signaling Systems
Nurses Call and Paging Systems
Intercommunication Systems
Miscellaneous Signal System Devices
Power Supply Items

Section 18 ELECTRICAL INSTRUMENT INSTALLATION

Section Introduction
Local-Mounted Flow Instruments
Flanged Electrical Liquid-Level Transmitters
Electrical Local-Mounted Liquid-Level Instruments
Local-Mounted Liquid-Level Instruments
Loca1-Mounted Pressure Instruments
Local-Mounted Temperature Instruments
Local-Mounted Temperature Instruments
Control Panel Installation
Connecting Electrical Panel Board Instruments

Section 19 ANCHORS, FASTENERS, HANGERS AND SUPPORT

Section Introduction
Miscellaneous Anchors and Bolts
Expansion and Self-Drill Anchors
Concrete Inserts and Powder Actuated Pins and Studs
Channel Inserts, Continuous Channel Inserts, and Channel Supports
Conduit Strap Supports
Structural Steel Beam Clamps and Bolts
Hanger Channels and Rods
Conduit and Pipe Clamps
Conduit, Cable and Ring Hangers
Conduit Supports, Straps and Hangers
Bus Duct Wall Brackets
Bus Duct Hangers and Supports
Field Cut Knockouts for Panelboards and Control Centers
Supports and Fasteners for Distribution Cabinets
Grouting in Steel Channels for Equipment

Section 20 DEMOLITION, EXCAVATION AND CONCRETE

Section Introduction
Channelng Concrete, Brick, and Tile Construction
Cutting Holes in Walls Heights to 10 and 15 Feet
Cutting Holes in Wal1s Heights to 20 and 25 Feet
Excavation for Poles
Machine Excavation for Ducts and Manholes
Hand Excavation for Ducts and Manholes
Rock Excavation for Ducts and Manholes
Shoring and Bracing Trenches
Disposal of Excavated Materials
Disposal of Excavated Materials
Machine and Hand Backfill
Duct Encasement and Manhole Forms
Duct Encasement and Manhole Concrete

Section 21 TECHNICAL INFORMATION

Section Introduction
Definitions
Mensuration Units
Conversion Factors
Decimal and Metric Equivalents of Common Fractions of An Inch
Natural Trigonometric Functions
Mechanical, Electrical and Heat Equivalents
Electrical Formula for Determining Amperes, Horsepower, Kilowatts
and Kilovolt-Amperes
Allowable Ampacities of Insulated
Copper Conductors
Aluminum and Copper-Clad Aluminum Conductors
Aluminum and Copper-Clad Aluminum Conductors
Correction Factors for Room Temperatures over 30?C (86?F)
Maximum Number of Conductors in Trade Size of Conduit or Tubing
Conduit Spacings
Electrical Symbols
Conversion Table Minutes to Decimal Hours

    • Weight
      2.04 lbs
    • SKU
      A209
  • Manufacturer
    Elsevier Science
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Functional defects must be reported to the manufacturer. Here’s a list of the manufacturer’s information.

Refunds
Upon an approved receipt you will be contacted for the original payment method of your order. Eligible refunds will be credited to that method of payment. If that payment method declines you will be notified of the situation and another payment method will need to be provided.