Masonry Magazine April 2002 Page. 18
TMS/continued from page 16
Space dimensions. These limitations were established through past field experience, and have helped ensure the adequate filling and consolidation of grout within masonry construction. As a new option, designers and contractors may now deviate from these prescribed limitations if it can be established, through the use of a demonstration panel, that the resulting finished construction is sound. This modification to the Specification has the potential to dramatically reduce the cost of grouted masonry construction by eliminating multiple-lift grouting or low pour heights.
Other Specification Changes
A major difference between the 2002 Edition of the MSJC Specification and previous editions of the Specification is the removal of the when required provisions that appeared in previous editions of the Standard. The Committee either modified or deleted those when required provisions to reflect minimum construction requirements, which is the intent of the MSJC Specification. Cold weather construction requirements have also been revised as Don McMican describes in TMS Responds, Volume 1, Number 3. Included in these revisions are protection procedures that need to be implemented when grouting in cold weather. Other notable revisions to the Specification and the Specification Commentary include:
• Addition of veneer anchor requirements
• Updating of ASTM C 270 mortar proportion and property specification tables to include mortar cement.
• Addition of a discussion in the Specification Commentary to reinforce the fact that field sampling and testing of mortar is conducted under ASTM C 780 and that it is used to verify consistency of materials and procedures, not mortar strength.
Conclusion
As described briefly above, the new 2002 editions of the Code, Specification, and the associated Commentaries will provide numerous improvements over the 1999 edition. These changes have undergone rigorous consideration, review and sometimes debate, not only by being balloted using three societies' rules (those of ACI, ASCE and TMS), but also by having been scrutinized by the Technical Activities Committees of ACI and TMS, and by a three-month long public review. The resulting provisions represent the consensus of the Masonry Standards Joint Committee, and should meet the needs of the entire masonry design and construction communities for years to come.
The 2002 MSJC standards are expected to be released this spring. The price for the 2002 MSJC Standards (TMS order code TMS 0402-02) has been set at $93.50 Retail (nonmember) and $70 for members. To place an order for a copy of the MSJC Standards, please call the TMS office.
Disclaimer
This document is intended to provide explanation of typical and not-so-typical questions regarding masonry design, construction, evaluation and repair. It is intended for masonry design professionals, architects, engineers, inspectors, contractors, manufacturers, building officials, students, and others interested in masonry. It is not intended to cover every aspect of the discussed topics, but rather to focus on key issues that should be considered and addressed. This document should not be used as the sole guide for designing, constructing, evaluating or repairing masonry. It is imperative to refer to relevant building codes, standards and other industry-related documents. As such, TMS assumes no liability for any consequences that may follow from the use of this document. In addition, the opinions, ideas and suggestions given herein are those of the respondent, and not necessarily those of The Masonry Society.
This document is produced bimonthly by: The Masonry Society 3970 Broadway, Suite 201-D Boulder, CO 80304-1135 Phone: (303) 939-9700 Fax: (303) 541-9215 Website: www.masonrysociety.org
Oversight: TMS Design Practices Committee, William A. Wood, chair Editors: Edwin T. Huston, Vilas Mujumdar, Phillip J. Samblanet and William A. Wood
Questions, ideas, suggestions and differing opinions may be sent to TMS for consideration for inclusion in future issues of TMS Responds
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18 MASONRY - APRIL, 2002