Vulnerability-Based Seismic Assessment and Retrofit of One-and Two-Family Dwellings - Volume 2C - Plan Set for Masonry Chimneys

Oct 24, 2026

Plan Set Volume 2C provides prescriptive, pre-engineered retrofit plans for masonry chimneys used as a supplement to FEMA P-1100 Volume 1. The set supports general contractors or homeowners without necessarily involving a registered design professional, subject to eligibility requirements and the scope described on Sheet S0. It explains the purpose and limitations, including that strengthening is intended to reduce earthquake-related damage risk for wood-frame dwellings with masonry chimneys and that building permits are always required.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages16

Reading Time40 min

AccessFree to download

Overview

Purpose and Scope

Limitation of Liability

Instructions for Use

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Vulnerability-Based Seismic Assessment and Retroft of One-andTwo-Family Dwellings Volume 2C-Plan Set for Masonry Chimneys FEMA P-1100-2C / October 2019 Vulnerability-Based Seismic Assessment and Retrofit of One-and Two-Family Dwellings Volume 2 – Plan Set for Masonry Chimneys Prepared by APPLIED TECHNOLOGY COUNCIL 201 Redwood Shores Parkway, Suite 240 Redwood City, California 94065 [www.ATCouncil.org](www.ATCouncil.org) Prepared for CALIFORNIA EARTHQUAKE AUTHORITY Janiele Maffei, Chief Mitigation Officer Erin Waters, Research Program Coordinator Sacramento, California FEDERAL EMERGENCY MANAGEMENT AGENCY Michael Mahoney, Project Officer Robert D. Hanson, Subject Matter Expert Washington, D.C. ATC MANAGEMENT AND OVERSIGHT Jon A. Heintz Ayse Hortacsu PROJECT TECHNICAL COMMITTEE Colin Blaney (co-Project Tech. Director) Kelly Cobeen (co-Project Tech. Director) Thomas Anderson Vikki Bourcier Michael Cochran Daniel Dolan Andre Filiatrault Brian McDonald John Osteraas Weichiang Pang PROJECT STEERING COMMITTEE David Bonowitz (Chair) Ifa Kashefi Philip Line Thor Matteson Bill Nagel Steve Pryor Frank Rollo Williston Warren (ATC Board Contact) WORKING GROUP Angela Arias Gaurav Bali Michael Ty Billings Brent Crawford Steve Fedorchak Gayle Jensen Kari Klaboe Dave Laverdiere David McCormick Javier Pascacio Michael Stoner Doug Thompson Taylor Vincent Dave Welch October 2019 Notice Any opinions, findings, conclusions, or recommendations expressed in this publication do not necessarily reflect the views of the Applied Technology Council (ATC), the Department of Homeland Security (DHS), or the Federal Emergency Management Agency (FEMA) . Additionally, neither ATC, DHS, FEMA, nor any of their employees, makes any warranty, expressed or implied, nor assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, product, or process included in this publication. Users of information from this publication assume all liability arising from such use. Cover photograph – Photograph showing masonry chimney. Overview Purpose and Scope This Plan Set is for retrofit of masonry chimneys and is provided as a supplement to FEMA P-1100, Vulnerability-Based Seismic Assessment and Retrofit of One-and Two-Family Dwellings, Volume 1 – Prestandard. The Plan Set presents prescriptive, pre-engineered plans for a suggested minimum level of retrofit design for use by a general contractor or homeowner without necessarily having to involve a registered design professional. Use of this Plan Set is limited to dwellings that are compliant with eligibility statements presented in Table 1 on Sheet S0 . The extent of the scope of this Plan Set is described on Sheet S0 . The Plan Set is intended to contain all of the necessary supplemental technical information and guidance for preparation of a complete set of plans for submittal to the local building department and for use during construction; however, supplemental information may be required by some building departments. Note that building permits are always required when performing the work described in this Plan Set. The Plan Set does not attempt to address all potential deficiencies in a home and does not eliminate the risk of potential damage in future earthquakes. Instructions for use are provided on Sheet S0 . Limitation of Liability Earthquake strengthening constructed in accordance with this Plan Set is intended to reduce the risk of earthquake-related damage to existing residential wood-frame dwellings with masonry chimneys. The content of this Plan Set is based on the experience and judgment of practicing engineers and limited research. All circumstances, forms, or types of construction have not necessarily been contemplated in the preparation of this Plan Set, and it isnot possible to control the quality of construction or predict or test all conditions that may occur during an earthquake. No

FAQs

What is the purpose of Plan Set Volume 2C for masonry chimneys?

It provides prescriptive, pre-engineered retrofit plans for masonry chimneys to supplement FEMA P-1100 Volume 1, supporting minimum retrofit design for eligible dwellings.

Who is this plan set intended to be used by?

It is intended for use by a general contractor or homeowner without necessarily involving a registered design professional, following the eligibility statements.

What limitations and liability statements apply to using this plan set?

Earthquake strengthening is intended to reduce risk, but the document notes it cannot address all potential deficiencies, cannot control construction quality, and does not provide warranties regarding design, condition, or suitability.

Oct 24, 2026

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