Overview of D1.8, Content, New Terminology

D1.8 Seismic Supplement Welding Manual

Overview of D1.8

Content.

FEMA 353 identified a variety of factors that made the pre-Northridge connection “…inherently susceptible to brittle fracture...” and then listed variables that can be grouped into the broad categories of overall structural design, connection design, connection details, materials, workmanship and inspection. While most of the design-related issues are covered in AISC standards, D1.8 addresses connection details, materials, workmanship and inspection issues.

These topics are covered in seven clauses as follows:

Clause 1	General Requirements
Clause 2	Reference Documents
Clause 3	Definitions
Clause 4	Welded Connection Details
Clause 5	Welder Qualification
Clause 6	Fabrication
Clause 7	Inspection

Following these clauses are eight mandatory annexes as follows:

Annex A WPS Heat Input Envelope Testing of Filler Metals for Demand Critical Welds

Annex B Intermix CVN Testing of Filler Metal Combinations (where one of the filler metals is FCAW-S)

Annex D Supplemental Welder Qualification for Restricted Access Welding

Annex E Supplemental Testing for Extended Exposure Limits for FCAW Filler Metals

Annex F Supplemental Ultrasonic Technician Testing

Annex G Supplemental Magnetic Particle Testing Procedures

Annex H Flaw Sizing by Ultrasonic Testing

Annex I Guidelines for the Preparation of Technical Inquiries for the Structural Welding Committee

Finally, the document concludes with an extensive commentary that provides background material and explains the Structural Welding Committee’s intent behind many of the provisions, as well as an index.

New Terminology.

In a manner that has been coordinated with the applicable AISC committees, D1.8 utilizes some new terminology. An understanding of these terms, officially defined in Clause 3: Terms and Definitions of D1.8, is necessary to properly apply the code.