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NATIONAL
STRUCTURAL
CODE OF THE
PHILIPPINES
2015
BMP
VOLUME I
BUILDINGS, TOWERS, AND OTHER
VERTICAL STRUCTURES
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MSCP C101 -15
NATIONAL
STRUCTURAL
COPE OF THE
PHILIPPINES
2015
VOLUME 1
BUILDINGS, TOWERS A IN!11
OTHER VERTICAL STRUCTURES
SEVENTH EDITION
First Printing , 2016
Association of Structural Engineers of the Philippines, Inc.
Suite 713, Future Point Plaza Condominium 1
112 Panay Avenue, Quezon City, Philippines 1100
Tel No ; (+632) 410-0483
Fax No. : (+632) 411-8606
Email : aseponline@ gmail .com
Website : http: //www.aseponline. org
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National Structural Code of the Philippines Volume I, 7th Edition, 1sl Printing , 2016
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PREFACE TO THE NSCP VOLUME 1, SEVENTH EDITION, 2015
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1.
Introduction
and installation of structural systems
ASEP recognizes the need tor an up-to-date structural code addressing the design
the Philippines (NSCP Volume I ) is
of
Code
Structural
National
new
through requirements emphasizing performance. The
the United States, to safeguard the
designed to meet these needs through various model codes/ regulations, generally from
public health and safety nationwide.
systems using prescriptive and
This" updated Structural Code establishes minimum requirements for structural
the use of new materials and
performance based provisions. It is founded on broad- based principles that make possible
e
-resistant structures.
earthquak
for
practice
new building designs. Also, this code reflects the latest seismic design
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2.
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Changes and Developments
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initially wanted to adopt the latest
its drive to upgrade and update the NSCP, the ASEP Codes and Standards Committee
where available local data is limited to support the upgrade,
In
editions of American code counterparts. However, thfor cases
.
then some provisions and procedures of the NSCP 7 edition were retained
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b.
International Building Code IBC-2009
c.
American Society of Civil Engineers ASCE /SEI 7 10
d.
American Concrete Institute ACI318 14 M
e.
American Institute for Steel Construction AISC 05 with Supplementary Seismic Provisions
f.
American Iron and Steel Institute AISI SI 00-2007
g.
Reinforced Masonry Engineering Handbook of America
h.
Concrete Masonry Handbook, 6 th Edition
i.
American National Standard Institute ANSI EIA /TIA 222-G I -2007
j.
American Society for Testing and Materials ( ASTM ) Standards
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The changes made in this chapter are the following:
Section 102 - Definition of Failure
a .2
Section 103 Classification of Structures
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Chapter 1 - General Requirements
a. 1
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Significant revisions are summarized as follows:
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, structures
School buildings of more than one story, hospitals, designated evacuation centers
are under the essential facilities category. Section 104 - Design Requirements
occupancy
Churches, Mosque and other related religious structures are under the special
category Section 104- Design Requirements.
nt is
The provision for deflection of any structural member under the serviceability requireme
ly.
respective
5
and
4
Chapters
in
specified
is
steel
and
concrete
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for
requireme
deleted . This
New requirements are added to the design review section .
a .3
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This NSCP 7 th edition is referenced from the following:
Uniform Building Code UBC-1997
a.
a.
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Section 105 - Posting and Instrumentation
Association of Structural Engineers of the Philippines, Inc. ( ASEP)
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The provision of installed recording accelerograph is adjusted.
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a.4
Inclusion of Appendix 1 -A : Recommended Guidelines on Structural Design Peer Review of
Structures 2015
a.5
Inclusion of Appendix 1 -B: Guidelines and Implementing Rules on Earthquake Recording
Instrumentation for Buildings
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b.
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Chapter 2 - Minimum Design Loads
The changes made in this chapter are the following:
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b. 1
Section 203 - Combination of Loads
The load factors and load combinations are revised particularly the load combinations
including wind load.
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b.2
Section 205 - Live Loads
Additional loads are incorporated in the table for minimum uniform and concentrated loads
particularly the parking garage and ramp live load.
b.3
Section 207 - Wind Loads
Wind load provisions, which were previously based on ASCE7-05, are updated based on
ASCE7-10. In this edition, three different wind contour maps for the entire Philippine
archipelago are generated and provided for determining the basic wind speeds for different
categories of building occupancies as defined in Table 103 1 . These maps provide basic wind
speeds that are directly applicable for determining pressures for design strength. Strength
design wind load factor is 1.0; whereas, allowable stress design wind load factor is 0.6.
Generally, basic wind speeds correspond to 3%, 7% and 15% probability of exceedance in 50
years ( MRI = 1700,700 and 300 years, respectively). Four ( 4) permitted procedures in
determining the design wind loads for main wind-force resisting systems ( MWFRS ), for other
structures and building appurtenances and for components and cladding ( C&C ) are provided
such as;
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directional procedure for buildings of all heights,
envelope procedure for low rise buildings,
directional procedure for other structures and building appurtenances and
analytical procedure for components & cladding, and
wind tunnel procedure
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The ANSI EIA /TIA-222-G -2005 and ANSI EIA/TIA-222 G 1 2007 are now fully referenced
for computing wind loads on steel antenna towers and antenna supporting structures.
b.4
Section 208 - Earthquake Loads
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The near source factors for 2-km distance from a causative fault is included in addition to 5
km, 10 km, 15 km distance and beyond 15-km distance.
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ASCE/SEI 7-10, using spectral acceleration, is recognized as an alternative procedure in the
determination of the earthquake loads.
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c.
Chapter 3- Earthworks and Foundations
The revisions made in this chapter are the following:
c. 1
Provisions pertaining to the conduct and interpretation of foundation investigations for cases
involving liquefiable, expansive or questionable soils are adopted;
National Structural Code of the Philippines Volume l, 7 th Edition, 1st Printing , 2016
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c.2
c.3
d.
The section on footings is amended to incorporate provisions for differential settlement,
design loads and vibratory loads;
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The section on special foundations, slope stabilization and materials of construction are added.
c.5
Provisions for construction in Zone 4 pertaining to reinforcement of Precast Prestressed Piles
have been revised to ensure consistency with ACI 318.
c .6
The figure for cut slopes has been amended for clarity;
c.7
The figure for fill slopes has been amended for clarity and some provisions have been
modified ;
c.8
A table on the minimum required number of boreholes has been added to the section on
foundation investigation ;
c.9
Provisions pertaining to minimum dimensions of ditches have been modified;
c. 10
The section on excavations and fills has been amended to incorporate provisions for scouring
and erosion protection as well as support of excavations and open cuts;
c. l 1
Provision pertaining to general pile requirements have been expand to include design of piles
and pile groups subjected to lateral loads.
c. l 2
A Section on MSE Structures and Similar Reinforced Embankments and Fills has been added ,
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The section on pile foundations is amended to incorporate new provisions on splicing of
concrete piles; and
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Chapter 4 - Structural Concrete
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To reflect the reorganization of ACI 318 14 which contained a number of significant technical changes , the
ASEP adopted similar changes in the NSCP 2015 7th Edition . The latest ACI 318 was reorganized as a memberbased document, i. e., particular member type, such as beam, column , or slab will have separate sub-sections for
all requirements to design that particular member type. This will eliminate the need to flip through several
Sections to comply with all the necessary design requirements for a particular structural member, as was
necessary with the old organization format.
d. I
Section 401: General
General information regarding the scope and applicability of NSCP 2015, Vol. 1 is provided. Additional subsection on interpretation is included to help users better understand Chapter 4, Structural Concrete.
d .2
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Section 402: Notation and Terminology
The definition for hoops has been modified because the use of interlocking headed bars is a concern regarding
the possibility that it will not be adequately interlocked and because the heads could become disengaged under
complex loadings well into the non-linear range of response. It is now defined as a closed tie or continuously
wound tie, made up of one or several reinforcement elements, each having seismic hooks at both ends.
A definition for special seismic systems, a term used in Sections 418 and 419, has been added .
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Section 403: Referenced Standards
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The following referenced specifications have been added to Section 403.2.4:
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ASTM A370-14, Standard Test Methods and Definitions for Mechanical Testing of Steel Products
ASTM A 1085- 13, Standard Specification for Cold-Formed Welded Carbon Steel Hollow
Structural Sections ( HSS)
ASTM C173/C 173M-14, Standard Test Method for Air Content of Freshly Mixed Concrete by
Volumetric Method
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Association of Structural Engineers of the Philippines, Inc. (ASEP)
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