Instructions for use: Code Analysis worksheet for the 2009 International Existing Building Code with Massachusetts Amendments



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Instructions for use:

Code Analysis worksheet for the 2009 International Existing Building Code with Massachusetts Amendments

The following template was prepared by engineers who are members of the Massachusetts Structural Advisory Committee (SAC) to the State Board of Building Regulations and Standards (BBRS.)  This committee includes members of SEAMASS and the Board of Directors has endorsed the work of the SAC on the Massachusetts State Building Code. The authors found this template useful in applying the Existing Building provisions for the Massachusetts State Building Code 8th Edition, and want to share this template with the structural engineering community.  This is not an official document, and comes with no guarantee of accuracy or completeness. We hope you find it useful in applying the new code provisions.

The first part of the work sheet is a summary sheet has two sections:


  • The first describes the scope of the project. Filling this out with as much detail as possible will help in determining various triggers that occur within the code.

  • The second part is a summary of the code analysis. This part gets filled out after you have gone through the worksheet and is intended to describe the structural scope of work required for the three compliance sections.

After filling out the scope of the project, the rest of the worksheet goes through the structural portions of the code starting with Chapter 1. The worksheet lists a code section reference, briefly describes the subject of the section and then has a third column for the engineer to input comments regarding the applicability of that section to the project. In some cases, the comments will be specific with a defined scope of work that must be performed. In other cases the comment may be that the section might apply or is not applicable. Following the worksheet to the end will help the engineer walk through the IEBC with MA amendments and develop a good understanding of the required, or potentially required, scope of structural work for each of the three compliance methods.

SEAMASS representatives continue to work collaboratively with the Structural Advisory Committee to assist the BBRS in developing code provisions. While SEAMASS will do its best to keep engineers informed of these changes, the Structural Advisory Committee and SEAMASS recommend that the engineer verify the current code when using the worksheet.

Last Revision: 11-20-2012

Code Analysis worksheet for the 2009 International Existing Building Code with Massachusetts Amendments

The following template was prepared by engineers who are members of the Massachusetts Structural Advisory Committee.  The authors found this template useful in applying the Existing Building provisions for the Massachusetts State Building Code 8th Edition, and want to share this template with the structural engineering community.  This is not an official document, and comes with no guarantee of accuracy or completeness. We hope you find it useful in applying the new code provisions.


[Project Name]




Existing:

  • [Describe the existing conditions here. Include all relevant information needed to evaluate the code provisions.]




Planned:

  • [Describe the proposed modifications here. Include all relevant information needed to evaluate the code provisions.]




Summary


Chapter 1 (Applicable to all three compliance methods):






Prescriptive Compliance Method:





Work Area Compliance Method:







Performance Compliance Method:






Chapter 1: Scope and Administration

Section

Title

N/A and comments

101

GENERAL





101.5.4.0

Mass amendment – Investigation and Evaluation. Subject to Mass amendment 107.6 to the IBC, a written report is required to be submitted to the Building Official.




101.5.4.1

Mass amendment – IBC Level Seismic

Refer to Table 101.5.4.1.0





101.5.4.2


Exceptions


Mass amendment – Exceptions

1. 50% 2009 IBC prescribed forces when directed to this section by 807.4.3

2a. 50% 2009 IBC prescribed forces when directed to this section by 1003.3.1 and the vertical addition increases the building area by 30% or less.

2b. 75% 2009 IBC prescribed forces when directed to this section by 1003.3.1 and the vertical addition increases the building area between 30% and 50%.






101.9

Mass amendment - Cumulative effects.




101.9 Exceptions

Mass amendment - Cumulative effects must be considered except when all:

  1. Structural work does not involve more than 2% of the total tributary area of horizontal framing members of any existing framed floor or roof.

  2. Structural work does not alter shear walls above the foundation.

  3. Structural work does not alter columns or diagonal braces.

  4. Structural work does not create an opening in any framed floor or roof that has an area more than 2% of the framed floor or roof.

  5. Structural work does not alter any floor or roof diaphragm and its connections such that in-plane shear resistance is reduced by more than 5%.
  6. Structural work does not remove or reconfigure lateral load resisting frames, or foundations supporting them.





101.10

Mass amendment - Masonry walls.

Must follow Appendix A1 where any of the following conditions exist:



  1. Work area > 50% aggregate area

  2. Occupancy increase by more than 25% and total occupancy is 100 or more.

  3. Occupancy change to a relative hazard category of 1 or 2 per Table 912.5 or educational occupancy K to12.

  4. A Level 2 Alteration to Occupancy Category IV per ASCE 7-05 table 1-1.




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