REVISIONS IN THE NATIONAL STRUCTURAL CODE OF THE PHILIPPINES 2015, 7TH EDITION CHAPTER 1 : GENERAL REQUIREMENTS
Chapter I : GENERAL REQUIREMENTS
Under this Chapter, the following Sections were updated and revised:
Section 102 : Definition of Failure Section 103 : Classification of Structures Section 104 : Design Requirements Section 105 : Posting and Instrumentation Inclusion of Appendix 1‐A and Appendix 1‐B
Section 102 : Definitions
The 2015 National Structural Code of the Philippines, Volume 1, 7th Edition, includes and elaborate the meaning of “FAILURE”.
As defined, FAILURE is an unacceptable difference between expected and observed performance. It includes catastrophic structural collapse, but also INCLUDES performance problems that are not necessarily catastrophic or life‐threatening, including “”serviceability problems such as distress, excessive deformation, premature deterioration of materials, leaking roofs and facades, and inadequate interior environmental control systems”.
Section 102 : Definitions In the event of a significant failure, the parties typically retain experts to determine the cause of the perceived failure. Occasionally a failure results from a single condition, but typically, failures result from a combination of mistakes, oversights, miscommunications, misunderstandings, ignorance, lapses, slips, incompetence, intentional violations or non‐ compliance, and inadequate quality assurance.
Section 102 : Definitions The causes for these conditions vary, but may include simple mistakes (such as sending information to a structural engineer when it should have been sent to the architect), conclusions based on faulty assumptions, an employee’s “laziness, ignorance, or malevolent urge,” fatigue from excessive workload, inadequate training, “time boxing” practices used to minimize fees to a client, overreliance on computer‐aided design and drafting (CADD), failure to understand and deliver client requirements, time pressures to a deliver a project by certain deadlines, and ineffective coordination and integration of the design team.
Section 103 : Classification of Structures The single‐story school building which is under the Special Occupancy Structures Occupancy Category of the National Structural Code of the Philippines 2010, 6th Edition is deleted. The National Structural Code of the Philippines 2015, 7th Edition categorized that all public school buildings are included in the Essential Facilities Occupancy Category. Churches, mosques and other related religious structures are classified as Special Occupancy Structures Category
Section 104 : Design Requirements National Structural Code of the Philippines 2010, 6th Edition
National Structural Code of the Philippines 2015, 7th Edition
Section 104.4 Foundation Investigation
Section 104.4 Foundation Investigation
Soil explorations shall be required for buildings, towers and other vertical structures falling under Categories I, II and III in accordance with Table 103‐1 or as required by the Building Official of if the site specific conditions make the foundation investigation necessary.
Soil explorations shall be required for buildings, towers and other vertical structures falling under Categories I, II, III and IV in accordance with Table 103‐1 or as required by the Building Official of if the site specific conditions make the foundation investigation necessary.
Detailed requirements for foundation investigations shall be in accordance with Chapter 3 of this code.
Detailed requirements for foundation investigations shall be in accordance with Chapter 3 of this code.
Section 105 : Posting and Instrumentation National Structural Code of the Philippines 2010, 6th Edition
National Structural Code of the Philippines 2015, 7th Edition
Section 105.2.1 General Unless waived by the building official, every building in Seismic Zone 4 or over 50m in height shall be provided with not less than three approved recording accelerographs. The accelerographs shall be interconnected for common and start and common timing.
Section 105.2.1 General Unless waived by the building official, every building in Seismic Zone 4 or over 50m in height shall be provided with not less than three approved Earthquake Recording Instruments (ERI). The ERI shall be interconnected for common and start and common timing. Refer to “ASEP Guidelines and Implementing Rules on Earthquake Recording Instrumentation for Buildings (Appendix 1‐B)
Section 105 : Posting and Instrumentation National Structural Code of the Philippines 2010, 6th Edition
National Structural Code of the Philippines 2015, 7th Edition
Section 105.2.3 Maintenance Maintenance and service of the instruments shall be provided by the owner of the building, subject to the monitoring of the Building Official. Data produced by the instruments shall be made available to the Building Official or the Philippine Institute of Volcanology and Seismology (PHIVOLCS) on request.
Section 105.2.3 Maintenance Maintenance and service of the instruments shall be provided by the owner of the building, subject to the monitoring of the Building Official. Data produced by the instruments shall be made available to the Building Official or any authorized agency upon request.
Section 105 : Posting and Instrumentation National Structural Code of the Philippines 2010, 6th Edition
National Structural Code of the Philippines 2015, 7th Edition
Section 105.2.4 Instrumentation of Selected Buildings All owners of existing structures selected by the authorities having jurisdiction shall provide accessible space for the installation of appropriate earthquake‐recording instruments. Location of said instruments shall be determined by PHIVOLCS or the authorities having jurisdiction. PHILVOLCS or the authorities having jurisdiction shall make arrangements to provide, maintain and service the instruments. Data shall be the property of the authorities having jurisdiction, but copies of individual records shall be made available to the owner of the building and to the public on request and after the payment of an appropriate fee.
Section 105.2.4 Instrumentation of Selected Buildings All owners of existing structures selected by the authorities having jurisdiction shall provide accessible space for the installation of appropriate earthquake‐ recording instruments, determined by a Structural Engineer.
Chapter 1 : GENERAL REQUIREMENTS UNDER THIS CHAPTER THE FOLLOWING GUIDELINES ARE INCLUDED AS APPENDIX 1‐A AND APPENDIX 1‐B
APPENDIX 1‐A : Recommended Guidelines on Structural Design Peer Review of Structures 2015 APPENDIX 1‐B : Guidelines and Implementing Rules on Earthquake Recording Instrumentation for Buildings
Chapter 1 : GENERAL REQUIREMENTS
THANK YOU AND HAVE A FRUITFUL SESSIONS AHEAD.
