Purpose and Use of This Manual | Lincoln Electric D1.8 instruction

D1.8 Seismic Supplement Welding Manual

The Purpose and Use of This Manual

This manual has been prepared by The Lincoln Electric Company to assist our customers in complying with the requirements of AWS D1.8. Additionally, a summary of important provisions is included to assist engineers, steel detailers and inspectors. This manual does not address every provision of D1.8, and tends to discuss only the general condition that will typically be encountered, versus unique situations that may arise. Readers of this manual are encouraged to obtain and review a copy of AWS D1.8, which can be purchased through the AWS (www.awspubs.com).

Reference to AISC specifications is also made throughout this manual. Copies of pertinent AISC documents can be downloaded from the AISC website (www.AISC.org) for free, or can be purchased in printed form.

This manual does not in any respect act as a substitute for or in compliance with AWS D1.8 or AISC specifications. Should any conflict exist between the content of this manual and these referenced specifications, the documents as published by AISC or AWS should be taken as the authoritative reference.

To assist the user, applicable provisions as contained in D1.8:2009 are referenced at the end of paragraphs describing the requirements.

Specifications

AWS D1.8 and Other Specifications.

AWS D1.8 alone cannot be used to design, fabricate, erect and inspect a structure intended to

resist seismic loadings. Of necessity, D1.8 is used in conjunction with other construction documents, specifications and codes. Importantly, D1.8 does not contain all the welding-related requirements. The general interaction of D1.8 and welding-related provisions is outlined below.

AWS D1.8 and AISC Specifications.

Three AISC specifications may apply to a project where seismic resistance is required: AISC 360 Specifications for Structural Steel Buildings3, AISC 341 Seismic Provisions for Structural Steel Buildings4, and AISC 358 Prequalified Connections for Special and Intermediate Steel Moment Frames for Seismic Applications5. These three documents will be referred to as AISC Specifications, AISC Seismic Provisions and AISC Prequalified Connections, respectively, throughout the remainder of this manual.

The relationship between AWS D1.8 and the AISC Specifications is no different than that between the AISC Specifications and AWS D1.1.

There is significant interaction between the AISC Seismic Provisions and D1.8. Typically, AISC Seismic Provisions specify where and when certain welding related provisions apply, while AWS D1.8 will specify how such provisions are implemented. For example, AWS D1.8 does not specify when steel backing must be removed from a connection. However, when backing removal is required by AISC specifications, AWS D1.8 specifies how the backing is to be removed.