2-6 thailand g sathian charoenrien no back
TRANSCRIPT
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Ministerial Regulation Amendmenton Structural Design
Sathian Charoenrien
Building Control Bureau Department of Public Works
and Town & Country Planning Thailand
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Topics
(1) Structural design standards and regulations in Thailand
(2) Building control act and ministerial regulations
(3) Reasons and Objectives of the amendment(4) Contents of the amendment(5) Conclusions
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Structural Design Standards and Regulations
(1) Building Control Act (1979)(2) Engineering Institute of Thailand Standards(3) Model Building Codes and Standards
(e.g. International Building Code, ACI 318 Building Code Requirements)
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Building Control Act
58 Ministerial Regulations (MR)- Structural design regulation- Mechanical and sanitary design regulation- Fire safety regulation- Open spaces, boundary and interval
of the building regulation- etc.
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Structural Design Regulations
(1) Ministerial Regulation No. 6 (1987)Structural design regulation
(2) Ministerial Regulation No. 48 (1997)Fire safety regulation
(3) Ministerial Regulation No. 49 (1997)Seismic building design regulation
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Reasons of the MR Amendment
(1) Thai construction technology has been rapidly developed.
(2) Model building codes and standards used in Thailand have been dramatically changed.
(3) There are few nonuniformity in Thai building standards.
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Objectives of the Amendment
(1) To update and improve the regulations for structural design practices
(2) To protect all citizens from structure failure(3) To ensure uniformity of Thai building codes
and standards
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Contents of the Amendment
(1) Loading regulations(2) Material regulations(3) Design requirements/approaches(4) Construction document
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Loading Regulations
Dead loadsAmendment: Include dead load regulations
(construction unit weight, partition load)
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Loading Regulations
Live loadsAmendment:
- Add more types of live loads- Classified base on occupancy- Reduction of live load
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Loading Regulations
Wind loadsAmendment:
- Simplified procedure- Detailed procedure-base on EIT standards
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Loading Regulations
Seismic loadsAmendment from MR49:
- More provinces to be enforced (Bangkok and its vicinity).
- Types of enforced buildings to be revised.
- The calculations to be modified.V = ZIKCSW (UBC1985)
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Loading Regulations
Other loadsAmendment: Include
- Impact loads- Crane loads- Lateral soil pressure
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Loading Regulations
Load factors and load combinationsMR6: Basic
U = 1.7DL + 2.0LLGravity + Wind load: U = 0.75(1.7DL + 2.0LL + 2.0WL)and U = 0.9DL + 1.3WL
Amendment: Include more load combinations
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Material Regulations
- Material properties- Minimum design requirements- Procedures for satisfying design criteria
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Material Regulations
Material - Wood- Brick and masonry- Concrete- Steel- Soil- Other structural material
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Material Regulations
Design stress of working stress design of Reinforced Concrete Structures
MR6: fc = 0.45β fc’ (β = 5/6)
Amendment: fc = 0.45 fc’ + Quality control( The quality control of concrete construction will be referred to the standard issued by EIT.)
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Design Requirements
Amendment: Include- Deflection- Connection- Concrete covering - Minimum dimension of structural members
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Design Approaches
- Allowable stress design- Limit state design- Other approaches
(e.g. Performance-base design)*** Engineering design procedures and details
will be referred to the concensus standards issued by the professional association ***
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Construction Document
- Type of occupancy- Loading condition - Wind/Earthquake design data- Material strength and design stress- Foundation information- Design approach
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Consequences
The draft of the Ministerial Regulation amendment is now under the consideration of the
subcommittee appointed by the Buildings Control Committee.
- The amendment will have a large impact on Thai building construction.- The amendment requires the revision of technical guideline and standard.
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Conclusions
- Thai structural design regulations will be updated and improved.
- The contents of the amendment will include loading, material regulations, design requirements and construction document.
- The amendment will have a large impact on Thai building construction.