Denro Technical Report

We publish our product and development research jointly with universities or on our own in the Denro Technical Report twice a year. Our publication of the “Steel Tower Journal” in the first issue of July 1980 has gained Denro a good reputation as specialists in the field of Steel Tower Design and Manufacturing.

No.78 (2024.1)

  1. Report on Denro’s Activities in the CIGRE (International Council on Large Electric Systems) 2023 Sendai Colloquium
  2. Examples of Lofting Work and Shop Assembly for Manufacturing Special Crossarms
  3. Abstract from Guide to Structural Designers of Steel Towers Focusing on Strength (Part 5 in the Series)
  4. Revised Contents of Design Standards on Structures for Overhead Transmission Lines, JEC-5101:2022
  5. Introduction of “Anchor Setting Device Adjustable Remotely from Ground Level”

Back Number No.77＜2023.7＞

  1. Supporting Towers for Retractable Wind Power Generation System for the Kingdom of Tonga
  2. Introduction of Development of Jacking-Up Device for Correction of Uneven Displacement of Dead-End Steel Transmission Tower Supporting 4-Circuit Conductors of Right-Angle
    Directions and Construction Work Therewith
  3. Introduction of “Field Repair Work Using Liner Crimping Method Using Leaf Spring and In-Situ Vacuum-assisted Resin Transfer Molding Technology”
  4. Abstract from Guide to Structural Designers of Steel Towers Focusing on Strength (Part 4 in the Series)
  5. Introduction of “Slim Multi-Man” Having New Functions, Multifunction Robot for Inner Maintenance of Main Posts of Tubular Steel Towers


Back Number No.76＜2023.1＞

  1. Transition of JIS for “Work-Positioning Devices” (Old Name:On-Pole Safety Belts) and their Structures
  2. Trial Manufacture and Performance Confirmation of Anticorrosive Step Bolts with Nonslip Coatings for Power Transmission Steel Towers
  3. Revision of Japanese Industrial Standards for Hot Dip Galvanized Coatings
  4. Introduction of “BTST method” for Replacing Main Posts at Top Portions of 500kV Tubular Steel Towers
  5. Abstract from Guide to Structural Designers of Steel Towers Focusing on Strength (Part 3 in the Series)
  6. Transition of Japanese Industrial Standards Pertaining to Lightning Disasters


Back Number No.75＜2022.7＞

  1. Introduction of Construction Overview Using Device and Construction Method for Replacing Main Posts of Angle Steel Towers in Okinawa Motobu Transmission Line
  2. Design, Manufacture and Erection of Lighting-Equipment Support Towers for Fukushima Prefectural Azuma Athletic Field
  3. Examples of Temporary Reinforcement (or Emergency Measures) for Damaged Steel Towers
  4. Abstract from Guide to Structural Designers of Steel Towers Focusing on Strength (Part 2 in the Series)
  5. Introduction of Measuring Tools and Surveying Instruments Used for Field Measurement Surveys of Steel Towers
  6. Introduction of Movable Type Protection Nets for Maintenance Work of Steel Towers


Back Number No.74＜2022.1＞

  1. Introduction of Construction Method for Replacing Main Posts above Bend Points of Angle Steel Towers
  2. Introduction of Examples of Measuring Deflections of Tubular Mono-pole Towers Caused by Solar Irradiation
  3. Report on Denro’s Activities in CIGRE (International Council on Large Electric Systems) in 2021
  4. Method for Investigating Fire-Damaged Steel Towers
  5. Abstract from Guide to Structural Designers of Steel Towers Focusing on Strength (Part 1 in the Series)
  6. Introduction of Method of Inner Surface Painting of Main Posts of Tubular Steel Towers


Back Number No.73＜2021.7＞

  1. Study on Gapped Surge Arrester “RYGAP” Applied to Electric Power Transmission and Distribution Facilities
  2. “PALENE-E5174”, Introduction of Temporary Anti-corrosion Coating Chemical for Hot-dip Galvanized Steel
  3. Previous Constructions for Replacing Steel Tower Members (Part 2)
  4. Comparison of Strengths According to Different Two Standards for Tower-Shaped Steel Structures
  5. Transition of Bolts for Steel Towers
  6. Introduction of Anti-Climbing Devices in the Series of DC Standard Products


Back Number No.72＜2021.1＞

  1. Introduction to Fastener Loosening Prevention Measures “HARDLOCK Nut”
    Part 2: HARDLOCK Nut as a Loosening Prevention Measure
  2. Report on Design, Manufacture and Erection of Rooftop Tower on Niihama Municipal Joint Office Building for Fire Fighting and Disaster Prevention
  3. Previous Construction for Replacing Steel Tower Members (Part 1)
  4.  Outlines of Amendments of “Dengi” and “Dengi-Kaishaku”
  5. Comparison of Loads According to Different Two Standards for Tower-Shaped Steel Structures
  6. Introduction of “Anchor Setting Device” – One of DC Standard Products


Back Number No.71＜2020.7＞

  1. Introduction of Examples of Measuring Metal Abrasion Loss
  2. Introduction to Fastener Loosening Prevention Measures “HARDLOCK Nut”
    Part 1: Why is Loosening a Problem?
  3. Usage and Durability Verification for Hot-dip Galvanized Rebars
  4. Trends of BIM/CIM in Building and Construction Fields and its Application to Steel Towers
  5. Field Sketching of Steel Towers6. Introduction of “Catchman”, Robot for Retrieving Foreign Substances from Inside of Main Posts of Tubular Steel Towers


Back Number No.70＜2020.1＞

  1. Design, Manufacture and Installation of Supporting Towers for Retractable Wind Power Generation System in the Kingdom of Tonga
  2. Introduction of Structural Improvements of Steel Towers for Hida-Shinano Direct Current Transmission Trunk Line
  3. Introduction of Steel Tower Dismantling-and-Removing Operations by Tower Crane Suspension Method
  4. Cremona’s Graphical Solution for Truss Structures
  5. Introduction of Examining 3D Clearances When Replacing Steel Towers at Original Positions
  6. Introduction of Standard Products “DC Myway (Advanced Model)”


Back Number No.69＜2019.7＞

  1. Latest Manufacturing Technology of Shape Steel Products
  2. Report on Design and Manufacture of No. 9 Tower of Katori Transmission Line
  3. Outlines of Amendment of “The Code for Personal Fall-Arrest Systems” and Its Selection
  4. Method of Field Welding Operation for Steel Towers
  5. Comparison of Corrosion Resistance Between Phosphated and Normal Galvanized Materials
  6. Introduction of “Liner Crimping Method Using Leaf Spring”


Back Number No.68＜2019.1＞

  1. Effects of Heat-Affected-Zone Microstructure, Applied Tensile Stress and Molten-Zinc Temperature on Zinc Embrittlement Cracking in Overstressed Low-Alloy Steels (Part 2)
  2. Introduction of Versatile Temporary Crossarms
  3. Report on Design, Manufacture and Construction of Patrol Towers at Sapporo Racecourse
  4. Measurement of Salt Content Member Surfaces
  5. Revision of Specifications for Highway Bridges
  6. Introduction of Zinc Spraying Method


Back Number No.67＜2018.7＞

  1. Effects of Heat-Affected-Zone Microstructure, Applied Tensile Stress and Molten-Zinc Temperature on Zinc Embrittlement Cracking in Overstressed Low-Alloy Steels
  2. Introduction of Examples of Horn Array Speakers and their Supports Installed for Disaster Prevention
  3. Countermeasures Against Uneven Displacements of an Extra-High Voltage Transmission Tower Erected in a Mountainous Area
  4. Report on Manufacture and Construction of Radio Communication Tower Erected on Rooftop of New North Building in Headquarters of Toho Gas Co., Ltd.
  5. Revision of JASS6 and Its Relating Recommendations
  6. Introduction of “Slim Multi-Man”, Multifunction Robot for Inner Maintenance of Main Posts of Tubular Steel Towers


Back Number No.66＜2018.1＞

  1. Analytical Study for Prevention of Galvanizing Cracks on Steel Structures with Drain Holes (Part 2)
  2. Forming Technology for Zinc Coating by Cold Spray Method and Results of Atmospheric Exposure Test
  3. Report on Manufacture of a Waist Type MC Tubular Steel Tower for the Kansai Electric Power Company, Inc.
  4. Introduction of Techniques to Replace Corroded Members of Beam Portions of Rectangular Steel Towers
  5. Nondestructive Testing of Internal Weld Defects
  6. Introduction of Work Method for Filling Mortar into Bottom Main Posts of Tubular Steel Towers


Back Number No.65＜2017.7＞

  1. Analytical Study for Prevention of Galvanizing Cracks on Steel Structures with Drain Holes (Part 1)
  2. Development of Strain Measurement System Using FBG Fiber-Optic Sensors
  3. Introduction of Steel Tower with its Lowest Main Posts Reinforced by Overlapped Angles
  4. Revision of JIS C 8955: 2017 “Load Design Guide on Structures for Photovoltaic Array”
  5. Nondestructive Testing of Surface Defects
  6. Introduction of “Two-Tier Anti-Climbing Devices” to Realize Blocking at Tower Panel Points


Back Number No.64＜2017.1＞

  1. Experimental Study for Prevention of Galvanizing Cracks on Steel Structure due to Differences in Drain Hole Size and Location
  2. Outline and Facilities for Research and Development of Surface Treatment of Iwate Industrial Research Institute
  3. Report on Design, Fabricate and Erection Work of Miniature Replica of Taipei 101 Exhibited in Tobu World Square
  4. Report on Design and Erection Work of Solar Array Supports Having Screw Pile Foundations
  5. Hydrogen Embrittlement Cracks of Hot Dip Galvanized Steel Materials
  6. Introduction of Fittings to Prevent Splash of Airborne Rainwater from Transmission Towers


Back Number No.63＜2016.7＞

  1. Study on Cracks Arising during Hot Dip Galvanizing of Steel Beam-Column Joints
  2. Report on Manufacture of A Tubular Steel Tower for Meteorological Observation by Phased Array Radar
  3. Performance Test of White Rust Inhibitors for Galvanized Coatings
  4. Introduction of Revision of Design Standards on Structures for Transmissions (JEC-TR-00007-2015)
  5. Introduction of Repairing Method of Hole-Making Portions on Corroded Tubes of Tubular Steel Towers


Back Number No.62＜2016.1＞

  1. Implementation of Support System for Diagnosing Deterioration of Paint Coatings Using Self-Organizing Map
  2. Meteorological Disasters and Relating Matters to be Noted for Electric Transmission Facilities
  3. Non-Linear Analysis and Loading Test of Hokuto-Imabetsu Direct Current Trunk Transmission Line Towers
  4. Introduction of Revised Contents of “Recommendations for Loads on Buildings (5th Edition)”
  5. Introduction of High-Speed Side Trimmer Equipped in Steel Strip Processing Lines
  6. Introduction of Paint Work Method without Using Scaffolds for Telecommunication Steel Tubular Monopoles (Suspension Type)


Back Number No.61＜2015.7＞

  1. Recognition and Management of Fatigue in Structures Constituting Infrastructures (Part 2)
  2. Introduction of Fall Prevention Gear during Work at Such High Elevations as on Steel Towers
  3. Construction Method for Replacing Bottom Main Posts of Angle Steel Towers
  4. Introduction of Qualifications Relating to Construction of Steel Structures (Part 3)
    — Qualifications Concerning Construction and Maintenance —
  5. Introduction of Alcohol-Dripping Type Continuous Quenching Furnace
  6. Introduction of Internal Inspection and Maintenance of Tubular Steel Towers


Back Number No.60＜2015.1＞

  1. Development of New Reinforcing Bars Coated with Zinc-Aluminum Alloy
  2. Safety Belts and their Associated Gear (Fall Arresting Devices) According to the Safety Belt Structural Guideline
  3. Design, Production and Construction of Omiya Network Center Telecommunication Tower of SBM (Softbank Mobile Corp.)
  4. Introduction of Qualifications Relating to Construction of Steel Structures (Part 2)
    — Qualifications Concerning Manufacture and Inspection —
  5. Introduction of Kettle Doctor: Kettle Wall Thickness Measurement with Molten Zinc Filled
  6. Introduction of Peak-Up Method


Back Number No.59＜2014.7＞

  1. Study on Countermeasures against Hot Dip Galvanizing Cracks of H-Shape Steel Members
  2. Recognition and Management of Fatigue in Structures Constituting Infrastructures
  3. Production and Construction of Counterpoise in New Ishigaki Airport
  4. Introduction of Qualifications Relating to Construction of Steel Structures (Part 1)
    — Qualifications Concerning General Construction and Each of Design/Survey/Consultation —
  5. Introduction of “DC Stabilizer”, Earthquake-Resistant Fittings for Parabolic Antenna Supports
  6. Introduction of Galvanized Rebars


Back Number No.58＜2014.1＞

  1. Study on Growing Behavior of Compound Layers at Interface between Steel Work and Molten Zinc
  2. Development of Coulometric Galvanizing Coat Thickness Tester
  3. Manufacture and Erection of Central Observational Tower at Kyoto University’s Kumatori Campus
  4. Intellectual Property Right
  5. Introduction of Fluidized Bed Furnaces for Oil Tempering
  6. Introduction of “ECO-DC”, Friction Joint Surface Treating Agent


Back Number No.57＜2013.7＞

  1. Development of hot dip galvanizing being colored with green type of interference color
  2. Fabrication and Erection of ARSR Antenna Tower in Hakone
  3. Removal of Additional Stresses on Two or More Main Legs of Angle Steel Towers and Countermeasure against Their Uneven Displacement by Reinforced Basket Truss
  4. Anti-Lightning Countermeasures against Long Stroke Wave Form Small Current Lightning by Using Gapped Line Surge Arrester
  5. Views and Ideas about Loads Acting Toward Solar Cell Array Supports
  6. Retrofit of Molding Machine for Aluminum Alloy Materials
  7. Introduction of Kotohira Full-Scale Testing Station


Back Number No.56＜2013.1＞

  1. Development of System for Diagnosing/Evaluating Deterioration of Paint Coatings by Image Processing
  2. Introduction of Horn Array Speakers with Their Supports Realizing Sufficient Sound Conveyance for Emergency Broadcast
  3. Experimental Study of Effectiveness of Gapped Line Surge Arresters against Long Stroke Wave Form Small Current Lightning
  4. Outlines of Design and Manufacture of Urban-Type PL Tower (No. 4) for Chiba Thermal Power Plant Transmission Lines Nos. 3 and 4
  5. Constituents of Paints/Coats and Mechanism of Their Curing
  6. Overall Introduction of Products Supplied by Plant Division
  7. Introduction of Simple Mast


Back Number No.55＜2012.7＞

  1. Mechanism and Prevention of Strains Arising when Galvanizing Steel Structures
  2. Experimental Study on Across-Wind Forces Acting on Prisms with Discontinuous Sections
  3. Temporary Reinforcement of Tubular Steel Towers Damaged by Tsunami (Tidal Waves) Caused by Earthquakes
  4. Soil Investigations for Steel Tower Foundations
  5. Introduction of Bell-Type Annealing Furnace Heated by Radiant Tubes
  6. Introduction of Diagnosis by Images for Painted Steel Structures


Back Number No.54＜2012.1＞

  1. Study on Mechanism of Galvanizing Cracks and Thermal Strains during Hot Dip Galvanizing of Steel Structures by Optimizing Method (Part 6)
  2. Introduction of Nonlinear Analyses
  3. Construction Method for Replacing Main Posts of Tubular Steel Towers
  4. Painting on Galvanized Steel Surfaces and Diagnosis of Deterioration of Paint Coatings
  5. Introduction of Annealing Furnace for Lead Frames
  6. General Introduction of Denro’s Standardized Commodities


Back Number No.53＜2011.7＞

  1. Study on Mechanism of Galvanizing Cracks and Thermal Strains during Hot Dip Galvanizing of Steel Structures by Optimizing Method (Part 5)
  2. High Strength Bolt Joint
  3. General Outlines for The Great East Japan Earthquake Disaster
  4. Methods for Rust/Corrosion Prevention of Steel Structures
  5. Introduction of Accuracy Measuring Method of X-Y Table by Laser Interferometer
  6. Introduction of Plane-Blocking Devices for Steel Towers


Back Number No.52＜2011.1＞

  1. Study on Mechanism of Galvanizing Cracks and Thermal Strains during Hot Dip Galvanizing of Steel Structures by Optimizing Method (Part 4)
  2. Fabrication and Erection of Tower for Retractable Wind Power System in Hateruma Island
  3. Destructive and Nondestructive Testing of Concrete
  4. Introduction of Billet-Heating Furnace
  5. Introduction of “Anchor Setting Device” – Denro’s Standardized Commodities


Back Number No.51＜2010.7＞

  1. Study on Mechanism of Galvanizing Cracks and Thermal Strains during Hot Dip Galvanizing of Steel Structures by Optimizing Method (Part 3)
  2. Construction Method for Replacing Main Posts of Angle Steel Towers
  3. Manufacture and Construction of Counterpoise for Koto LDA
  4. Design and Construction of Bottom Post of Steel Tower
  5. Introduction of Quenching Equipment in Heat-Treating Plant for Steel Plank
  6. Introduction of “Myway” – Denro’s Standardized Commodity Product


Back Number No.50＜2010.1＞

  1. Study on Mechanism of Galvanizing Cracks and Thermal Strains during Hot Dip Galvanizing of Steel Structures by Optimizing Method (Part 2)
  2. Method for Installation of Cable Support for Sakaihama Stanchion of Sharp Corporation
  3. Design, Manufacture and Erection of Monument-Style Wind Power Generation Tower Called “SMARK TOWER”
  4. Bimetallic Corrosion
  5. Introduction of Pipe Cutting-and-Welding Line
  6. Introduction of Denro Anti-Climbing Device Series


Back Number No.49＜2009.7＞

  1. Study on Mechanism of Galvanizing Cracks and Thermal Strains during Hot Dip Galvanizing of Steel Structures by Optimizing Method (Part 1)
  2. Landscape-Harmonic Tower for Mobile Telecommunications
  3. Remedial Measures against Uneven Displacement of Steel Tower Foundation
  4. Mechanism of Bolt Joints and Tightening Torque
  5. Introduction of Energy-Saving in Steel Cord Manufacturing Lines
    — Energy-Saving of Holding and Drying Furnaces in Thermal Diffusion Type Brass-Plating Lines —
  6. Introduction of “KANTAN-CHECK”, Remedial Fittings for Ends of Braces of Tubular Steel Towers


Back Number No.48＜2009.1＞

  1. Measures against Looseness of Bolts on Steel Transmission Towers
  2. Protection of Structures against Lightning
  3. Reinforcing Work of Main Posts of Tubular Steel Truss Telecommunication Towers
  4. Introduction to Practical Hot Dip Galvanizing Operations Part 1 – Outlines and Applications of Hot Dip Galvanizing
  5. Introduction of Electrical Control System for Patterning Equipment
  6. Introduction of Device for Replacing Steel Tower Braces


Back Number No.47＜2008.7＞

  1. Study of Mechanical Properties of Steel Materials by Means of Micro-Hardness Testing Machine
  2. Introduction of Helicopter-Utilized Workerless Tower-Dismantling Work Method
  3. Construction Work of Human-Inaccessible Foundations for Towada-Kitakami Trunk Electric Transmission Line Towers
  4. Amendments of the Industrial Standardization Act
  5. Introduction of Fluidized Bed for Diffusion of Electroplated Surfaces of Steel Wires
  6. Introduction of “Simple Shadan”, Plane Blocking Device for Steel Towers in the Serialized Denro Anti-Climbing Devices


Back Number No.46＜2008.1＞

  1. Tower Height Extension Method by Use of Additional Foundations for Shingai Trunk Line
  2. Amendments of the Building Standards Law and Others
  3. Design and Execution of Countermeasures against Uneven Displacement of Nanokaichi Connection Transmission Line Towers
  4. Hot Dip Galvanizing Operation for Castings and Cross-Sectional Analysis of Their Uncoated Portions
  5. Introduction of Patterning Equipment for Solar Panels
  6. Introduction of Angle Steel Type Step-Providing Device for Steel Towers (Patent Pending)


Back Number No.45＜2007.7＞

  1. Analysis of Hot Dip Galvanizing Cracks
  2. Introduction of the Evaluation and Diagnosis System for Corrosion of Buried Portions of Tubular Steel Poles
  3. Universal Temporary Support for Height Extension of Transmission Line Towers
  4. Design of Flange Joints
  5. Introduction of “High-Temperature Fluidized Bed” for Heat Treatment of Wires
  6. Introduction of ND-Style Snow-Resistant Anti-Climbing Device


Back Number No.44＜2007.1＞

  1. Change of Temperature and Thermal Stress Distribution Brought about during Hot Dip Galvanizing of Steel Flat Plates
  2. Proposal of Advanced Protection Methods from Lightning
  3. Tower Height Extension by ND Work Method
  4. Looseness of Bolts
  5. Loopro Type Continuous Annealing & Plating Equipment
  6. Introduction of “Perch Step” or Easy Scaffold for Painting on Steel Towers


Back Number No.43＜2006.7＞

  1. Methods of Reinforcement for Insufficient Tensile Strength of Tower Main Posts
  2. Evaluation of Tower Deterioration through Images Obtained during Patrol by Helicopters
  3. Earthquake-Proof Diagnosis for Steel Towers (Part 3)
  4. Galvanized Steel Reinforcing Rods
  5. Introduction of Laser Plate-Processing Machine Installed in Nippon Denro’s Tohoku Factory
  6. Introduction of “Guard-Up” or Barrier Reinforcing Anti-Climbing Device for Steel Tower


Back Number No.42＜2006.1＞

  1. Development of Tower Height Raising Method by Use of Additional Foundations
  2. Earthquake-Proof Diagnosis for Steel Towers (Part 2)
  3. Design, Manufacture and Erection of Sasamoriyama Digital Broadcasting Tower
  4. Protective Measures against Distortion Caused by Hot Dip Galvanizing
  5. Loopro Continuous Annealing Furnace
  6. Introduction of Multipurpose Net for Protecting Steel Towers from Damage and Harm Caused by Birds, Falling Snow/Ice, Wind Noise and Flying Balls


Back Number No.41＜2005.7＞

  1. Development of Utility Temporary Crossarms
  2. Earthquake-Proof Diagnosis for Steel Towers (Part 1)
  3. Introduction of Analytical Method for Galvanizing Bathes
  4. Calculation of Tower Deflection
  5. Introduction of Laser Deep Grooving Device
  6. Introduction of Temporary Stage “Apron Deck”


Back Number No.40＜2005.1＞

  1. System for Evaluating Deterioration of Steel Surfaces by Self-Organizing Feature Map
  2. Introduction of “Recommendations for Loads on Buildings (2004)”
  3. Remedial Work Method for Uneven Foundation Displacement Suffered on Angle Steel Towers
  4. Design and Engineering of Steel Structures According to the Features of Hot Dip Galvanizing
  5. Introduction of Galvanizing Line with Meddle-Size Kettle
  6. Effect of Nickel Added to Hot Dip Galvanizing Bathes


Back Number No.39＜2004.7＞

  1. Thermal Conductivity Analysis and Thermal Stress Distribution for Welded Flat Plates Suffered Sudden Changes in Temperature
  2. Metal Spraying
  3. Application of Virtual Shop Assembly System for Steel Towers
  4. Design Book – Design of Tubular Steel Mono-Poles Considering Influence of Metal Fatigue
  5. Transfer System for Larger Glass Sheets
  6. Introduction of Laser Plate-Processing Machine for Steel Towers


Back Number No.38＜2004.1＞

  1. Development of slender triangular towers
  2. Consideration about Application of Steels for Building Structure (SN Steels) to Steel Towers
  3. Introduction of “KARTE” System for Evaluating Deterioration and Maintaining Steel Towers
  4. Basic Specification of CCL (Continuous Color-Coating Lines)
  5. Seismic Loads
  6. Basic Study on New Friction Surface Treating Agent


Back Number No.37＜2003.7＞

  1. Hypersonic Measurement of Thickness for Hot Dip Galvanized Steel Plates
  2. Lightning Protective Equipments and Earthing Apparatus
  3. Introduction of Virtual Shop Assembly System for Steel Towers
  4. Calculation of Indirect Bolting for Angle Steel Towers – Manufacturing Book (Part 3)
  5. Introduction of ETC Gateposts and Pedestals Installed on Expressways


Back Number No.36＜2003.1＞

  1. Combined Nonlinear Analysis of Electric Transmission Line Towers Considering Semi-rigid Connections
  2. Construction of Tohoku Galva Center Reduction of Life Cycle Costs of Steel Structures by Hot Dip Galvanizing
  3. Measurement of Natural Frequency on Various Bridges
  4. Introduction of “TV-STANS”– System for Structural Analysis Aiming at Digitalization of Broadcasting Towers
  5. Practically Applied Evaluation of Deterioration for Hot Dip Galvanized Coating by Advanced Image Processing


Back Number No.35＜2002.7＞

  1. Thermal Strain and Temperature Variation during Hot Dip Galvanizing Tests for Steel Plates Welded with T-Shaped Joints
  2. Remedial Operation for Steel Towers Affected by Foundations Displaced Unevenly
  3. Introduction of Typical Internal Inspections for Tubular Steels
  4. Vibration of Tubular Steel Members Caused by Vortex Induced Vibration
  5. Design and Erection of Galvanized High Strength Bolting Connection


Back Number No.34＜2002.1＞

  1. Development of Triangle Section Tie Rod Tubular Steel Towers
  2. Construction of a New Tower on NTT DoCoMo Tohoku’s Yamagata Branch Building
  3. Partial Amendment of Regulations Relating to Enforcement of Civil Aeronautics Laws
  4. Weld of Hot Dip Galvanized Materials
  5. Wind Loads in View of Amended Japan’s Standard Building Codes
  6. Introduction of Protect Cap
  7. Overall Introduction of Tower Maintenance


Back Number No.33＜2001.7＞

  1. Elasto-Plastic Analysis of Complete Models of Steel Transmission Line Towers Considering Local Buckling
  2. Report on Design, Fabrication and Erection of a Steel Telecommunication Tower for Saitama Operation Center
  3. Study on Air Stream Field around Architectural Models
  4. Earthquake-Proof Design of Steel Towers
  5. Anchoring Calculation of Steel Tower Foundation Members under the Stubs & Cleats System – Manufacturing Book (Part 2)
  6. Introduction of Jigs for Replacing Braces and Horizontal Members of Tubular Steel Towers


Back Number No.32＜2001.1＞

  1. Study for Response Analysis in Time Series on Coupled-System Consisting of Transmission Line Towers and Strung Wires by Using Simulation Results for Fluctuation of Wind Velocity
  2. Fabrication and Erection of a Rooftop Telecommunication Tower on Koriyama Fire Station
  3. Wind and Vortex Induced Vibration
  4. Introduction of Temporary Crossarms for Construction Method Using Span Spreading Protection Nets
  5. Series Study for Faultless Fabrication of Tubular Steel Towers (Part 1) – Study for Strength of Panel Points
  6. Introduction of Anchor Installation Device for Underreamed End Auger Foundation


Back Number No.31＜2000.7＞

  1. System Development for Evaluation of Deterioration of Hot Dip Galvanized Steel Surfaces by Computerized Image Analysis Together with Practical Evaluation of Deterioration on Inner Surfaces of Tubular Steels
  2. A Limit State Analysis Method of Truss Structures Using Higher Differentiation Obtained by Computer Algebra
  3. Structural Study of Radio Telecommunication Towers Considering Landscape-Harmonization
  4. Strength of Joints of Steel Towers Designed in Conformity with JEC Standard – Design Book (Part 4)
  5. Recycling of Trees and Wood Felled in Transmission Line Constructions
  6. Introduction of New Types Radio Telecommunication Towers


Back Number No.30＜2000.1＞

  1. Experimental Study on Stress Property of “Twist Tower”
  2. Fabrication of a Landscape-Harmonizing Steel Tower for Tachibana Bay Thermal Power Plant Transmission Line
  3. Earthquake-Proof Diagnosis on Steel Towers and their Reinforcing Case Studies
  4. Development of a New Low Lightness Coating Method
  5. Strength of Members of Steel Towers Designed in Conformity with JEC Standard – Design Book (Part 3)
  6. Introduction of Over-Road Gantries


Back Number No.29＜1999.7＞

  1. Study for Triangle Section Towers
  2. Design, Manufacture and Erection of the Telecommunication Tower for Tennoji Fire Station
  3. Fuzzy Prediction System for Wind Speed and Wind Direction in Typhoon Area using Real-time Data
  4. Tower Bottom Maintenance for Tubular Steel Towers
  5. Assumption of Stress Analysis for Tower-Shaped Steel Structures – Design Book (Part 2)
  6. Introduction of New Type Steel Transmission Line Towers


Back Number No.28＜1999.1＞

  1. Inelastic Analysis of Steel Transmission Towers Considering Their Local Buckling
  2. Fabrication of Telecommunication Tower for Chita Power Control Substation
  3. The Mechanism of the Occurrence for the Fluctuating Force on a Stationary Two-Dimensional Circular Cylinder
  4. Study for Typifying Transmission Line Tower Design Considering Harmonization with Landscape
  5. Assumption of Loads in “JEC-127-1979” Design Book
  6. Anti-Loosening Measures for Tower Leg Connection Bolts – Introduction of Round Stiffening Nut


Back Number No.27＜1998.7＞

  1. Fundamental Research and Study of Functionality between Outer Forces Applied to Steel Transmission Towers and Their Responsive Behaviors
  2. Study for Streamlining Structural Design of Rooftop Telecommunication Towers
  3. Telecommunication Tower Erected in the Site of Canal Branch of Kanto Area Construction Bureau of the Ministry of Construction
  4. “OMZP-2” a Chemical Processing for Hot Dip Galvanized Surfaces Connected by Frictional High Tensile Bolts
  5. Static Analysis of Structures by Finite Element Method (FEM)
  6. Introduction of Waterproof Type Of ND-Style Noiseproof and Anti-Nesting Devices


Back Number No.26＜1998.1＞

  1. Experimental Study on Proof Strength of Steel Structural Compression Members under High-Speed Load Application
  2. Partial Load-Applying Test of Crossarm Joints for Hitachi-Naka Thermal Power Line Steel Towers Being Solicitous about Landscape
  3. Manufacture of a Telecommunication Tower with Octagonal Sections for Nihon Dengyo Kosaku Co., Ltd.
  4. Technological Development for Compact Overhead Transmission Lines by Applying Polymer Insulation Arms
  5. Laws, Acts and Regulations Relating to Steel Towers
  6. Introduction of “Advanced ND Micro Poles”


Back Number No.25＜1997.7＞

  1. Full Scale Loading Test of a Steel Tubular Monopole for Nakano Branch Transmission Line
  2. Elongation of Tower Height by the TOP Construction Method
  3. Buckling Strength and Post Buckling Behavior of Seam Welded Steel Pipes Known as a Kind of Constituent Material for Steel Transmission Line and Radio Telecommunication Towers
  4. “Tower Maintenance Method” for Angle Steel Transmission Line Towers
  5. Guide for Design of Tower-Shaped Steel Structures Series No.19
    “Design of Steel Tower Foundation, Part 4”
  6. Introduction of ND-Style Anchor Setting Device Employed for Hokuoh and Yamagata Transmission Lines


Back Number No.24＜1997.1＞

  1. Experimental Study on Restoring Properties of Steel Structures under High-Speed Load Application
  2. On The Local Buckling Strength of Electric-Resistance-Welded Tubes Used as One of the Constituent Materials of Steel Transmission Line Towers and Radio Telecommunication Towers Considering the Material Behavior
  3. Developmental Study on Corrugated Plate Joints of Bracings for Steel Tubular Towers
  4. Guide for Design of Tower-Shaped Steel Structures, Series No.18
    “Design of Steel Tower Foundation, Part 3”
  5. Introduction of Semi-Monocoque Towers
  6. [Introduction]
    Issued by Transmission and Substation Construction Department of Korean Electric Power Corporation
    “765kv Transmission System – Construction Plan and Technical Review”
    (Japanese Translation)


Back Number No.23＜1996.7＞

  1. Three-Dimensional Stress Analysis of Coupled-System Structures Consisting of Transmission Line Towers and Geometrically Nonlinear Strung Wires
  2. Design, Fabrication and Erection of Semi-Monocoque Towers for Mobile Communications
  3. Introduction of Fall Arresting System
  4. “Tower Maintenance” (Diagnosis for Corrosion of Towers)
  5. Guide for Design of Tower-Shaped Steel Structures, Series No.17
    “Design of Steel Tower Foundation, Part 2”
  6. Introduction of “Apron Deck” (Temporary Scaffold for Steel Towers)


Back Number No.22＜1996.1＞

  1. Experimental Study on Application of Diffusion Jointing to Connections of Steel Structures
  2. Design, Shop Fabrication and Site Assembly of Type 4PHs Tower for Aichi-Seto Transmission Line, where Type-CD Sleeve Joint Adopted
  3. Application of Seam Welded Pipes Manufactured by the Makers with the Membership of “Welded Steel Tube Association” to Steel Towers
  4. Offshore Procurement of Steel Tower Materials
    “Report on Making a Korean Tower Manufacturer Supply Steel Tower Materials for Hotoda Transmission Line of the Tokyo Electric Power Co., Inc.”
  5. Guide for Design of Tower-Shaped Steel Structures, Series No.16
    “Design of Steel Tower Foundation, Part 1”
  6. Introduction of ND-Myway (Small Scale Bridge)


Back Number No.21＜1995.7＞

  1. Report on Evaluation on Seismic Capacity of Transmission Line Towers and Tele-Communication Towers via Study of the Great Hanshin Earthquake
  2. Mechanical Properties of High-Polymer Insulating Crossarms for 154kv Transmission Lines
  3. Guide for Phosphating
  4. Introduction of Heavy-Duty Type ND-Myway


Back Number No.20＜1995.1＞

  1. Analysis of Dynamic Response of Tubular Single-Post Towers
  2. Fabrication of Large Communication Tower Erected on the Rooftop of Chiyoda Building
  3. Hot Dip Galvanizing
  4. Guide for Quality Assurance Inspection
    “Destructive Test of Weld”
  5. Introduction of ND-Style Rack for Installation of Tower Foundation (Part 2)


Back Number No.19＜1994.7＞

  1. Experimental Study on Chronographic Properties of Steel Structural Joints under High Speed Repetitious Load Applying (Part 2)
  2. Design, Fabrication and Construction of Dead-end Tower for Traversing the Okayama Channel of Electric Transmission Line Between Honshu and Shikoku
  3. Specific Properties of Wide Rolled Angle Steels
  4. Dynamic Property of Coupled-System Structures Consisting of Transmission Line Towers and Strung Wires (Conductors & Earthwires)
  5. Guide for Quality Assurance Inspection
    “Nondestructive Test of Weld”
  6. Introduction of ND-Style Rack for Installation of Tower Foundation (Part 1)


Back Number No.18＜1994.1＞

  1. Experimental Study on Chronographic Properties of Steel Structural Joints under High Speed Repetitious Load Applying (Part 1)
  2. Introduction of Construction Method for Replacement of Main Post Members of Existing Large-Scale Tubular Steel Towers
  3. Application of TMCP Steel to Tower Tubular Members
  4. Experimental Design of Compact Electricity Transmission Lines
  5. Welding Technology (Part 2)
  6. Introduction of ND-Style Tripodal Tubular Communication Tower “Musen”


Back Number No.17＜1993.7＞

  1. Experimental Study on Applicability of Diffusion Jointing to Steel
    Transmission Line Towers
  2. Design and Fabrication of Supporting Towers for Tairyuji-Temple Ropeway
  3. Recent Progress in Pipe-Making Technology
  4. Welding Technology (Part 1)
  5. Introduction of “ND-Style Soundproofing & Bird-Prevention Device”


Back Number No.16＜1993.1＞

  1. Study on Towers with Improved Ultimate Strength (Knee-brace Truss)
  2. Steel Work Fabrication for the Sightseeing Tower Constructed in Kasumigaura Fureai Land
  3. Guide for Design of Tower-Shaped Steel Structures, Series No.15
    “Manner for Detail Drawings of Tubular Steel Transmission Line Tower”
  4. Introduction of Temporary Crossarm for Transmission Line Wiring Work


Back Number No.15＜1992.7＞

  1. Study for Development of Semi-Monocoque Tower (Part 2)
  2. A Report on Design, Fabrication and Construction of Aesthetic Towers for Munakata Branch Line
  3. Buckling Analysis of Rolled Steel Angle
  4. Guide for Design of Tower-Shaped Steel Structures, Series No.14
    “Manner for Detail Drawings of Angle Steel Transmission Line Tower, Part 3”
  5. Tubular Tower Lifting Work (Introduction of NDK-P Method)


Back Number No.14＜1992.1＞

  1. Study for Development of Semi-Monocoque Tower (Part 1)
  2. Construction of a Microwave Communication Tower on New Kyoto Prefectural Office Building
  3. Study for Combined Nonlinear Analysis with Consideration of Rigidity at Bolted Connection
  4. Guide for Design of Tower-Shaped Steel Structures, Series No.13
    “Manner for Detail Drawings of Angle Steel Transmission Line Tower, Part 2”
  5. Introduction of Newly Developed Quay Guard “Costapia”


Back Number No.13＜1991.7＞

  1. Study on Development of New Joint for Main Legs of Tubular Towers (Part 2)
  2. Design and Fabrication of the Rigid-Frame Tower Leading Electricity Cables in π-shape for Shigenobu Branch Transmission Line
  3. Process of Steel Structure Manufacturing, Series No.8
    “Bent Products Manufacturing Shop”
  4. Guide for Design of Tower-Shaped Steel Structures, Series No.12
    “Manner for Detail Drawings of Angle Steel Transmission Line Tower, Part 1”
  5. Introduction of Folding Ladder “Noncladd”


Back Number No.12＜1991.1＞

  1. Study on Development of New Joint for Main Legs of Tubular Towers (Part 1)
  2. Construction of an Environmentally-Matched and Administrative Steel Microwave Tower with Rigid-Frame for Prevention of Disasters in Nagoya City (Part 2)
    “Tower Fabrication and Construction”
  3. Process of Steel Structure Manufacturing, Series No.7
    “Forged Flange Manufacturing Shop”
  4. Guide for Design of Tower-Shaped Steel Structures, Series No.11
    “Design of Power/Sub Station Structures, Part 2”
  5. Introduction of New Snow-Driving Fence


Back Number No.11＜1990.7＞

  1. An Experimental Study Related to the Rigidity of the Connections by Galvanized Regular Bolts
  2. Construction of an Environmentally-Matched and Administrative Steel Microwave Tower with Rigid-Frame for Prevention of Disasters in Nagoya City (Part 1)
    “Tower Design”
  3. Process of Steel Structure Manufacturing, Series No.6
    “Bolt and Nut Manufacturing Shop”
  4. Guide for Design of Tower-Shaped Steel Structures, Series No.10
    “Design of Power/Sub Station Structures, Part 1”
  5. “Flora” Supportingly Presented at Expo ’90 Featuring Flower & Green


Back Number No.10＜1990.1＞

  1. Study for Mechanical Properties of Steel Structural Connections under High Speed Loading
    “Mechanical Properties of Connections Subjected to Loading Speed”
  2. Design, Fabrication and Construction of Supporting Tower for F.R.P. Chimney
  3. Process of Steel Structure Manufacturing, Series No.5
    “Full Scale Loading Test Facilities”
  4. Guide for Design of Tower Steel Structure Section
    “Design of Steel Supports for Power/Sub Station Equipment”
  5. Introduction of New Products Decorating Streets with Flowers and Arbores


Back Number No.9＜1989.7＞

  1. An Experimental Study of Karman on Tubular Steel Towers (Part 2)
  2. Construction of a Cylinder Type Steel Microwave Tower at a Purification Plant in the World Exposition Commemoration Park
    Part 2: Tower Fabrication and Construction
  3. Process of Steel Structure Manufacturing, Series No.4
    “Galvanizing Shop”
  4. Guide for Design of Tower Steel Structure Section
    “Design of Steel Radio Antenna Tower Part-4”
  5. An Introduction of a Protective Against Hot-Line


Back Number No.8＜1989.1＞

  1. An Experimental Study of Karman on Tubular Steel Towers (Part 1)
  2. Construction of a Cylinder Type Steel Microwave Tower at a Purification Plant in the World Exposition Commemoration Park
    Part 1 Tower Design
  3. Process of Steel Structure Manufacturing, Series No.3
    “Steel Plate Structure Member Processing Shop”
  4. Guide for Design of Tower Steel Structure Section
    “Design of Steel Radio Antenna Tower Part-3”
  5. Introduction of “Products for Watcher Route”


Back Number No.7＜1988.7＞

  1. A Study on Dynamic Analysis of Self-Supporting Steel Overhead Transmission Line Towers and Guyed Steel Towers Considering Effects of Wires
    (Part 2: The Experiments on the Support Vibration)
  2. Construction of a Microwave Tower on the Rooftop of the Building for the Head Office of Electric Power Development Company Limited
  3. Process of Steel Structure Manufacturing, Series No.2
    “Steel Pipe Structure Member Processing Shop”
  4. Guide for Design of Tower Steel Structure Section
    “Design of Steel Radio Antenna Tower Part-2”
  5. Introduction of “ND-Myway” of All Types


Back Number No.6＜1988.1＞

  1. A Study on Dynamic Analysis of Self-Supporting Steel Overhead Transmission Line Towers and Guyed Steel Towers Considering Effects of Wires (Part 1)
  2. Design and Construction of Overseas Broadcasting Antenna Towers
  3. Process of Steel Structure Manufacturing, Series No.1
    “Steel Angle Structure Member Processing Shop”
  4. Guide for Design of Tower Steel Structure Section
    “Design of Steel Radio Antenna Tower Part-1”
  5. Introduction of ND Type of Metal Fittings for Sound Proofing and Sparrow Guard


Back Number No.5＜1987.7＞

  1. An Experimental Study for Property of Rigidity of Tower-Shaped Tubular Truss Construction
  2. An Outline of Full Scale Test of a Tower for Export Comparable to That for Domestic 1000kv Transmission Lines
  3. Guide for Design of Tower Steel Structure Section
    “Design of Transmission Steel Tower Part-3”
  4. Introduction of Manufacturing Process of Steel Structure
  5. Introduction of ND-Manhole Guard


Back Number No.4＜1987.1＞

  1. Tests Related to Mechanical Properties of Connections by Angle Steel Subjected to High Speed Tension Load
  2. Design and Construction of Radio Antenna Towers for Disaster Prevention Administered by Aichi Prefectural Government
  3. A Method of Establishing Wind Pressure Load upon Towers Considering the Increasing Factor of Wind Velocity According to the Height above Ground and Lateral Swing of Overhead Wires (Another case of Insulator Supporting Points in Vertical Configuration)
  4. Guide for Design of Tower Steel Structure Section
    “Design of Transmission Steel Tower Part-2”
  5. Introduction of Phillystran


Back Number No.3＜1986.7＞

  1. ests Related to Response of Steel Structures to High Speed Tensile Load
  2. Limit State Analyses of Tower Steel Structure and Study Related to Response of Subject to earthquakes.
  3. Design, Fabrication and Construction of Anti-Corrosive Mono-Pole Type of Steel Supports Used in a Branched Transmission Line for Fujibo Ehime Factory.
  4. A Method of Establishing Wind Pressure Load upon Towers Considering the Increasing Factor of Wind Velocity According to the Height above Ground and Lateral Swing of Overhead Wires (In Case of Insulator Supporting Points in Horizontal Configuration)
  5. Comparison of Design Methods for Steel Tower on Various Standards
  6. Guide for Design of Tower Steel Structure Section
    “Design of Transmission Steel Tower”
  7. Introduction of Snow Driver
  8. Introduction of ND Micro Tower


Back Number No.2＜1986.1＞

  1. Tests Related to “Semi-Rigid Factor” to Show the Rigidity of the Connections by Galvanized Regular Bolts
  2. Tower Lifting Work (NDK Method)
  3. A Report on Design Fabrication and Construction of an Aesthetic Gantry Structure for 66kv Transmission Line in Kitamatsuyama Substation
  4. Comparison of Design Methods for Steel Tower on Various Standards
  5. Guide for Design of Tower Steel Structure Section
    “General Conception of Materials”


Back Number No.1＜1985.7＞

  1. Effects of Strain Rate in Steel Structural Joints Subjected to Earthquakes
  2. Design and Construction of A Guyed Steel Tower for Meteorological Observation in the Ohma Area in Aomori Prefecture
  3. Guide for Design of Tower Steel Structure Section
  4. Introduction of Phillystran
  5. Introduction of ND-Myway

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