NACE SP21461-2020

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NACE SP21461-2020

Item No. SP21461-2020

Approved: 2020-08-19

ISBN 1-57590-409-8

Corrosion Evaluations of Masonry Clad

Steel Frame Buildings (Pre-1950)

This NACE International standard represents a consensus of those individual mem-

bers who have reviewed this document, its scope, and provisions. Its acceptance

does not in any respect preclude anyone, whether he or she has adopted the stan-

dard or not, from manufacturing, marketing, purchasing, or using products, process-

es, or procedures not in conformance with this standard. Nothing contained in this

NACE standard is to be construed as granting any right, by implication or otherwise,

to manufacture, sell, or use in connection with any method, apparatus, or product

covered by letters patent, or as indemnifying or protecting anyone against liability for

infringement of letters patent. This standard represents minimum requirements and

should in no way be interpreted as a restriction on the use of better procedures or

materials. Neither is this standard intended to apply in all cases relating to the sub-

ject. Unpredictable circumstances may negate the usefulness of this standard in

specic instances. NACE assumes no responsibility for the interpretation or use of

this standard by other parties and accepts responsibility for only those ofcial NACE

interpretations issued by NACE in accordance with its governing procedures and

policies which preclude the issuance of interpretations by individual volunteers.

Users of this NACE standard are responsible for reviewing appropriate health, safe-

ty, environmental, and regulatory documents and for determining their applicability in

relation to this standard prior to its use. This NACE standard may not necessarily

address all potential health and safety problems or environmental hazards associat-

ed with the use of materials, equipment, and/or operations detailed or referred to

within this standard. Users of this NACE standard are also responsible for establish-

ing appropriate health, safety, and environmental protection practices, in consulta-

tion with appropriate regulatory authorities if necessary, to achieve compliance with

any existing applicable regulatory requirements prior to the use of this standard.

CAUTIONARY NOTICE: NACE standards are subject to periodic review, and may

be revised or withdrawn at any time in accordance with NACE technical committee

procedures. NACE requires that action be taken to reafrm, revise, or withdraw this

standard no later than ve years from the date of initial publication and subsequent-

ly from the date of each reafrmation or revision. The user is cautioned to obtain the

latest edition. Purchasers of NACE standards may receive current information on all

standards and other NACE publications by contacting the NACE FirstService De-

partment, 15835 Park Ten Place, Houston, TX 77084-5145 (tel: +1 281-228-6200,

email: rstservice@nace.org).

ABSTRACT

When distress of a structure is evident, it

is important to determine the nature of the

degradation to select the best restoration

strategy. This standard practice provides

testing procedures and investigative

techniques for the evaluation of mason-

ry-clad steel frame buildings. The inves-

tigation and evaluation techniques de-

scribed in this standard focus on

degradation resulting from corrosion of

the steel frame.

This standard provides the investigator,

corrosion specialist, engineer, or owner a

framework for evaluating the corrosion

condition of a steel frame building beyond

simple visual inspection and basic sound-

ing techniques. Evaluation techniques

that identify general and localized corro-

sion of masonry-clad steel frame build-

ings are provided.

This standard is intended for use by cor-

rosion specialists, historic architects,

structural engineers, and exterior building

envelope consultants involved with eval-

uating corrosion of steel frame buildings

and the subsequent effect on the mason-

ry cladding. It also may be useful to own-

ers of historic buildings whose service life

may be affected by steel frame corrosion.

KEYWORDS

Historic building, masonry, steel frame

corrosion, inspection, survey, TG 460

republication or redistribution of this standard in any form without the express written permission of the publisher is

prohibited. Contact NACE International by means of our website www.nace.org, email FirstService@nace.org, or

(phone) +1 281-228-6223 for reprints of this standard.

Reproduction, republication or redistribution of this standard in any form without the express written per-

mission of the publisher is prohibited. Contact NACE International by means of our website www.nace.org,

email FirstService@nace.org, or (phone) +1 281-228-6223 for reprints of this standard.

Foreword

This NACE International standard practice provides testing procedures and investigative techniques for the evaluation of mason-

ry clad steel frame buildings. The investigation and evaluation techniques described in this standard focus on degradation re-

sulting from corrosion of the steel frame. When distress of a structure is evident, it is important to determine the nature of the

degradation to select the best restoration strategy. Although this standard does not specically address restoration options,

additional information on repairs and corrosion mitigation techniques can be found in other NACE International and industry wide

standard practices, test methods, and state-of-the-art reports, and other publications.1-19

This standard is intended for use by corrosion specialists, historic architects, structural engineers, and exterior building envelope

consultants involved with evaluating corrosion of steel frame buildings and the subsequent affect to the masonry cladding. It also

may be useful to owners of historic buildings whose service life may be affected by steel frame corrosion.

Note: The term structural engineer used throughout this document refers to a nationally or locally licensed/certicated design

professional qualied and experienced in structural engineering

NACE Task Group (TG) 460, “Testing and Evaluation of Corrosion on Steel-Framed Buildings” prepared this standard. The TG

is composed of users, consulting engineers, manufacturers, and other interested parties, and this standard represents a consen-

sus of those members. This standard is not intended to be all encompassing. However, it provides information that allows the

user to perform testing and evaluation of masonry clad steel frame buildings that are believed damaged from corrosion of the

structural steel frame or ancillary steel. The buildings subject to this evaluation methodology were constructed between the

1880s and the 1940s. Note that the information gathered during this investigation may require subsequent investigation and

evaluation by a qualied structural engineering personnel or equivalent locally or national licensed professional, or architect

depending on the nature and extent of degradation.

This standard was prepared in 2020 by NACE TG 460, which is administered by Specic Technology Group (STG) 01, “Rein-

forced Concrete,” and sponsored by STG 02, “Coatings and Linings, Protective: Atmospheric.” It is published under the auspic-

es of STG 01.

In NACE standards, the terms shall, must, should, and may are used in accordance with the denitions of these terms in

the NACE Publications Style Manual. The terms shall and must are used to state a requirement, and are considered

mandatory. The term should is used to state something good and is recommended, but is not considered mandatory. The

term may is used to state something considered optional.

NACE International SP21461-2020 3

Reproduction, republication or redistribution of this standard in any form without the express written permis-

sion of the publisher is prohibited. Contact NACE International by means of our website www.nace.org, email

FirstService@nace.org, or (phone) +1 281-228-6223 for reprints of this standard.

NACE International Standard Practice (SP21461)

Corrosion Evaluations of Masonry Clad Steel

Frame Buildings (Pre-1950)

1. General .............................................................................................................................................................................. 4

2. Denitions .......................................................................................................................................................................... 4

3. Historic Building Issues ...................................................................................................................................................... 5

4. Basic Inspection ................................................................................................................................................................ 7

5. In-Depth Inspection ............................................................................................................................................................ 8

6. Evaluation and Report...................................................................................................................................................... 14

References ....................................................................................................................................................................... 16

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摘要：

NACE SP21461-2020 是国际腐蚀工程师协会（NACE International，现为 AMPP）发布的一项标准规范，全称为“标准实践：管线系统完整性管理中的腐蚀控制与监测”。该标准为石油、天然气及相关行业提供了系统化的技术指导，重点关注如何通过有效的腐蚀控制措施来确保管线系统在设计、建设和运行过程中的安全与完整性。文档涵盖了腐蚀风险评估、监测技术选择、数据管理以及维护策略等关键环节，适用于工程师、项目经理和合规人员。通过遵循 SP21461-2020，用户能够降低泄漏事故风险、延

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NACE SP21461-2020

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