AWS D1.8/D1.8M:2025 Structural Welding Code – Seismic Supplement

AWS D1.8/D1.8M:2025 Structural Welding Code – Seismic Supplement

Buildings in earthquake zones put extra demands on their welded joints. The aws d1.8 seismic supplement 2025 edition is the American Welding Society document that adds seismic requirements to structural welding work, published in English by AWS in 2025.

It is written for welders and engineers whose projects must hold up under seismic loading, with its focus on practice in the United States. Where a structure is designed to resist earthquakes, the welding on it has to meet more than the general steel code, and this supplement is where those added requirements live.

What the seismic supplement adds

The book gives detailed information on structural welding techniques with seismic considerations in mind. It is used alongside the main structural welding code rather than in place of it, so most readers already work with AWS codes and need the seismic layer on top.

Who should have a copy

Structural engineers who specify welds in seismic force-resisting systems, fabricators and erectors building those frames, and inspectors who sign off the work are the readers this supplement is written for. Welding students heading into structural steel will meet it on the job too.

Why the 2025 date matters

Codes are cited by year. If a project specification calls for D1.8/D1.8M:2025, this is the edition that matches it.

Before you order

Look at the specification for the project or class you are buying for. If it calls out D1.8 with the 2025 date, this is the right copy.

Book details

• Title: AWS D1.8/D1.8M:2025 Structural Welding Code – Seismic Supplement
• Author: American Welding Society (AWS)
• Edition: 2025
• Publisher: American Welding Society
• Language: English

Questions buyers ask

What year is this edition?

It is the 2025 edition, D1.8/D1.8M:2025.

Does this replace the main structural welding code?

No. It is a supplement covering seismic requirements and is used together with the main code.

Who publishes D1.8?

The American Welding Society.

Is it useful outside earthquake-prone areas?

It is written for structures that must resist seismic forces, so it matters most on projects designed for seismic loading in the United States.

Where do you ship?

We ship within the USA, and orders arrive in 5 to 7 working days.