Author(s)/Editor(s): (NFPA) National Fire Protection Association | Size: 270 MB| Format:PDF| Quality:Original preprint| Publisher: Delmar Cengage Learning| Year: September 18, 2019 | ISBN: 1455922978
Prepare for the electrical challenges of tomorrow, today, with NFPA 70, National Electrical Code (NEC), 2020 edition.
The world never stops changing, so it's crucial to keep learning how to keep it safe. Incorporated by reference in all 50 states and used across the globe, NFPA 70®, National Electrical Code® (NEC®), is the benchmark standard for electrical safety in residential, commercial, and industrial settings.
NFPA 70, NEC, was first published in 1897 and is continually put through a rigorous review process to keep it up to date with the most current industry practices, emerging trends, and the development and introduction of new technologies. The new NEC provides the latest requirements for safer and more effective electrical design, installation, and inspection, including provisions for wiring, overcurrent protection, grounding, and equipment.
Get up-to-code and prepared for the safety challenges of new sources of electrical power with the NEC, 2020 edition.
The revised and expanded NFPA 70, National Electrical Code, features state-of-the-art information for safe electrical practices for public and private buildings, homes and structures, outdoor yards and lots, utility equipment, installations that connect to the power grid, and consumer-owned power generation systems and equipment.
Content has been added, edited, and reorganized to address safety for workers, energy systems and electric vehicles, limited energy, and communication systems.
Impactful changes include:
New requirements for exterior emergency disconnects of one- and two-family dwellings for improved electrical safety for emergency responders
Revisions to service disconnect rules to help protect electrical workers from arc flash hazards
Adapted and adjusted requirements for installation practices of new technologies to meet the evolving demand of power over Ethernet
Updates to modernize tables currently in use for calculations to reflect improvements in energy efficiency and align with evolving codes
Revised requirements for ground-fault protection within marinas and boatyards
Introduction of guidelines for the safe use of electric vehicles (electric vehicle power export equipment) as a backup or emergency power source for a building or a home
Reorganization of Article 310, including new user-friendly numbering for important ampacity tables, and new definition for cable bundle in Article 725
Relocation of surge protection device requirements to new Article 242
Revisions to alternative energy systems and electric vehicle requirements to clarify what portions of the PV system are covered by the requirements of Article 690 and the line side and load side connections of interconnected power supply sources, and to clearly distinguish energy storage systems from storage battery systems
Reorganization of Article 800 to provide a general set of requirements to apply throughout the Chapter 8 articles
Revisions to requirements for communications cables that are also carrying power to communication devices and revisions to the current limit for cables carrying power and data
The NEC, 2020 edition, introduces significant new requirements for:
The residential installation of receptacle outlets serving island and peninsular countertops and for surge protection of services supplying dwelling units
Working space for “housekeeping pads” for electrical equipment, the installation of wiring methods in exit enclosures, sizing supply and load conductors used with adjustable-speed drive systems, and AFCI protection of branch circuits in patient sleeping areas in care facilities
Calculating the load of electric vehicle supply equipment with variable current settings
Worker safety in identifying the source of power for disconnecting means and for egress from spaces containing large electrical equipment
Grounding of disconnecting means installed on the supply-side of service disconnecting means
Cables installed exposed on ceiling surfaces and sidewalls
Special occupancies, special equipment, and special conditions, including installation of splash pads, the use of “Type P” cables in hazardous classified locations, and the reinspection of swimming pools and other bodies of water
Help protect life and property with the most relevant electrical requirements.
Get the cutting edge information you need to identify and overcome the latest hazards and complexities in electrical work. Order your copy of NFPA 70®, National Electrical Code, 2020 edition, today.
Interested in other editions of the NEC? Use the drop down menu above to select the edition year you need.
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Author(s)/Editor(s): Jeffrey Evans, Daniel Ruffing , David Elton | Size: 112 MB| Format:PDF| Quality:Original preprint| Publisher: CRC Press| Year: September 17, 2021| pages: 431 | ISBN: 0415695120
Ground improvement has been one of the most dynamic and rapidly evolving areas of geotechnical engineering and construction over the past 40 years. The need to develop sites with marginal soils has made ground improvement an increasingly important core component of geotechnical engineering curricula. Fundamentals of Ground Improvement Engineering addresses the most effective and latest cutting-edge techniques for ground improvement.
Key ground improvement methods are introduced that provide readers with a thorough understanding of the theory, design principles, and construction approaches that underpin each method. Major topics are compaction, permeation grouting, vibratory methods, soil mixing, stabilization and solidification, cutoff walls, dewatering, consolidation, geosynthetics, jet grouting, ground freezing, compaction grouting, and earth retention.
The book is ideal for undergraduate and graduate-level university students, as well as practitioners seeking fundamental background in these techniques. The numerous problems, with worked examples, photographs, schematics, charts and graphs make it an excellent reference and teaching tool.
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EC 61400-1: 2014: Wind turbines – Part 1: Design requirements
Author(s)/Editor(s): International Electrotechnical Commission | Size: 1.3 MB| Format:PDF| Quality:Original preprint| Publisher: Multiple. Distributed through American National Standards Institute (ANSI)| Year: 2014| pages: 194
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Posted by: poolmand - 09-04-2021, 09:24 AM - Forum: ISO
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The ISO 19901-2:2017 :
Petroleum and natural gas industries
Specific requirements for offshore structures
Part 2: Seismic design procedures and criteria
ISO 19901-2:2017 contains requirements for defining the seismic design procedures and criteria for offshore structures; guidance on the requirements is included in Annex A. The requirements focus on fixed steel offshore structures and fixed concrete offshore structures. The effects of seismic events on floating structures and partially buoyant structures are briefly discussed. The site-specific assessment of jack-ups in elevated condition is only covered in ISO 19901-2:2017 to the extent that the requirements are applicable.
Only earthquake-induced ground motions are addressed in detail. Other geologically induced hazards such as liquefaction, slope instability, faults, tsunamis, mud volcanoes and shock waves are mentioned and briefly discussed.
The requirements are intended to reduce risks to persons, the environment, and assets to the lowest levels that are reasonably practicable. This intent is achieved by using:
a) seismic design procedures which are dependent on the exposure level of the offshore structure and the expected intensity of seismic events;
b) a two-level seismic design check in which the structure is designed to the ultimate limit state (ULS) for strength and stiffness and then checked to abnormal environmental events or the abnormal limit state (ALS) to ensure that it meets reserve strength and energy dissipation requirements.
Procedures and requirements for a site-specific probabilistic seismic hazard analysis (PSHA) are addressed for offshore structures in high seismic areas and/or with high exposure levels. However, a thorough explanation of PSHA procedures is not included.
Where a simplified design approach is allowed, worldwide offshore maps, which are included in Annex B, show the intensity of ground shaking corresponding to a return period of 1 000 years. In such cases, these maps may be used with corresponding scale factors to determine appropriate seismic actions for the design of a structure.
For design of fixed steel offshore structures, further specific requirements and recommended values of design parameters (e.g. partial action and resistance factors) are included in ISO 19902, while those for fixed concrete offshore structures are contained in ISO 19903. Seismic requirements for floating structures are contained in ISO 19904, for site-specific assessment of jack-ups and other MOUs in ISO 19905 (all parts), for arctic structures in ISO 19906 and for topsides structures in ISO 19901‑3.
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Can you please share the following ASCE conference paper:
Title: Shaft Resistance of Rock- Socketed Drilled Piers,
Authors: Horvath, R. G., and T. C. Kenney,
Publisher: ASCE Conference Paper,
Date: Atlanta, October 23–25, 1979
Structures require a complete load path to maintain stability. Load paths connect each point of load application to a point of resistance. In seismic design, every element with mass is considered a point of application and the foundation is considered the point of resistance. This presentation focuses on seismic load path and the role of diaphragms and their components, including chords, collectors, and collector connections. Foundation issues are discussed and the concept of deformation compatibility of the entire structure is presented.
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This presentation addresses the derivation of design forces for braced-frame beams and their connections for various loading conditions including wind and seismic loads. In particular, the presentation focuses on the combination of frame-design and diaphragm-design forces. The presentation gives a methodology for determining consistent sets of design forces based on increasing levels of complexity. Emphasis will be placed on clear free body diagrams and consistent sets of forces corresponding to clear and understandable load conditions for the frame.
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Dear All,
The latest DNVGL-RP-C210:2019 Edition-Probabilistic methods for planning of inspection for fatigue in offshore structures was released in September 2019 and DNV-RP-B401:2021 Edition Cathodic protection design Cathodic protection design was released in May 2021
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The IEC 61400-3:2019 was released in 2019. Please share with us if you have this.
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Posted by: poolmand - 08-30-2021, 09:28 AM - Forum: ACI
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ACI MATERIALS JOURNAL
Size: 5.9 MB | Format:PDF | Quality:Original preprint | Publisher: American Concrete Institute | Year: JULY 2021 | pages: 146
This peer-reviewed journal continues the publishing tradition the Institute started in 1904. Information published in ACI Materials Journal includes: properties of materials used in concrete; research on materials and concrete; properties, use, and handling of concrete.
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