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HomeMy WebLinkAbout03162005 BSC Agenda Item 1 • • Appendix A Amendments to the Standard Codes Schedule regarding foundations 3-16-05a Note_ Base draft includes the proposed new Section 3 as of 11-29-04; additional revisions after that date are marked in the text. Delete the existing paragraph 3 under "International Building Code"and insert the following: 3. The foundation for each new building (and each new addition to a building) • .. - = ontaining habitable space (as defined in the IBC)(or additions to existing buildings) with rxerc than one story, or with a gross floor area of 485 square feet or more, must meet the criteria in this section, as applicable. In this section: "A2LA Lab"means a laboratory accredited by the American Association for Laboratory Accreditation on the basis of ISO/IEC 17025:1999 ("general requirements for the competence of testing and calibration laboratories"). "RLPE"means a licensed or registered professional engineer of the State of Texas who is: (1) listed with the State Board of Professional Engineers in either the civil or structural branch of engineering (but, from and after May 1, 2006, listing in the structural branch is required); (2) employed by a registered engineering firm of the State of Texas; and (3) (unless waived by the BSC as provided in"f'below) covered by professional errors and omissions insurance that: (i) has limits of at least $250,000 per claim(and at least $500,000 per year, aggregate) and (ii) has effective dates—including any retroactive coverage date—that include the entire period when the person provides services or takes actions regulated by this section. Page 3 S • "RLGE"means a person who is: (1) either: (a) a registered professional geoscientist of the State of Texas, or(b) a licensed or registered professional engineer who is listed with the State Board of Professional Engineers in a relevant branch of engineering (civil, structural or geological) and employed by a registered engineering firm of the State of Texas; and (2) - : -- :. . . . . : covered by professional errors and omissions insurance that: (i) has limits of at least $250,000 per claim (and at least $500,000 per year, aggregate) and (ii)has effective dates—including any retroactive coverage date—that include the entire period when the person provides services or takes actions regulated by this section. a. Engineering. Foundations must be constructed in accordance with complete plans and specifications prepared, signed and sealed • - . • .. .. •- - . . and manual signature) by a RLPE. The plans and specifications must be prepared specifically for the site of the work, and they must meet criteria as to scope, content and form specified by the building official. If there are existing trees (either to remain or to be removed)within 20 feet of a foundation,that could affect a foundation,the RLPE must acknowledge, in writing,certify that the trees have been taken into account in the preparation of the plans and specifications. b. Basic Standards. Each foundation must be an approved basic type listed in the following chart. In addition, the design of each foundation must be supported by a geotechnical report and special engineering certification, to the extent indicated in the following chart. [Note: chart is newl Page 4 1 • Approved Basic Types. See Note 1. Geotechnical Report. Special Engineering See Notes 2 and 3. Certification. See Note 4. Structural slab with void space and deep foundations Limited Not required Structural floor with crawl space and deep foundations Limited Not required Stiffened structural slab with deep foundations Full Required Stiffened non-structural slab with deep foundations Full Required Mixed-depth system for all new building construction Full Required Mixed-depth system for building additions with deep foundations Full Required Another type approved by special exception issued by the BSC. As specified in the As specified in the special See `f"below. special exception exception Note 1. Approved Basic Types. Types of foundations are defined and described in"Foundation Design Options For Residential and Other Low-Rise Buildings on Expansive Soils" published by the Structural Committee of the Foundation Performance Association, Houston,Texas(Document#FPA-SC-01-0,Rev#0,30 Jun 04,marked"For Website Publishing"),a copy of which is on file in the City Secretary's office("FDO"). Note 2. Geotechnical Report,Standards. The plans and specifications for each foundation must be based on a written geotechnical report prepared,signed and sealed by a RLGE. The report must cover all testing and site evaluation,and all must meet all applicable criteria in "Recommended Practice for Geotechnical Explorations and Reports"published by the Structural Committee of the Foundation Performance Association,Houston,Texas(Document#FPA-SC-04-0,Rev#0, 11 April 2001,issued for website publishing),a copy of which is on file in the City Secretary's office. The minimum depth of borings is 20 feet in all cases. All tests and other laboratory work must be performed by an A2LA Lab. Note 3. Geotechnical Report, Scope. "Limited" indicates that the geotechnical testing, evaluation and report may be limited to a determination of the appropriate depth for the deep foundations(but the deep foundation components must meet the other criteria applicable to them). "Full"indicates that the geotechnical testing,evaluation and report must cover all foundation components. Note 4. Special Engineering Certification. Where indicated as"required,"for a particular type of foundation,the RLPE must certify that the plans and specifications were prepared to achieve a soil-caused foundation movement potential of one inch or less,and that the RLPE used the estimated depth of the active zone and at least two of the following methods to prepare the plans and specifications: (1)Potential vertical rise(PVR)determined in accordance with Test Method Tex-124-E,Rev.January 1,1978/December 1982,Texas State Department of Highways and Public Transportation, Materials and Test Division, "Method for Determining the Potential Vertical Rise,PVR"(a copy of which is on file in the office of the City Secretary). For this purpose,the"dry"moisture condition (from which little shrinkage is experienced,but where volumetric swell potential is greatest)shall be used for each sample and test. (2)Swell tests performed in accordance with ASTM D4546-03,"Standard Test Methods for One-Dimensional Swell or Settlement Potential of Cohesive Soils"as last revised prior to June 1,2004. (3)Suction and hydrometer swell tests performed in accordance with ASTM D5298-03 "Standard Test Method for Measurement of Soil Potential (Suction) Using Filter Paper" and ASTM D6836-02 "Standard Test Methods for Determination of the Soil Water Characteristic Curve for Desorption Using a Hanging Column,Pressure Extractor,Chilled Mirror Hygrometer,and/or Centrifuge,"as such methods were last revised prior to June 1,2004. written geotechnical report prepared, signed and alcd by a RLGE. The report must cover all Page 5 • • - _ ., . • . .. •.-, . . . - . ---- • . .. • . . - • - •. •- "' - - --- . . . • April 2001, issued for website publishing), a-copy of which is on file in the City Secretary's office. •. . • , . -- .. . . . . .. " . .. . . . .. . void space and deep foundations?' or"structural floor with crawl space and deep foundations," as described below,the testing, evaluation and report foundations, but they the deep foundation components must meet the other . .. • : - - '• • y: . . - . -- laboratory work must be performed by an A2LA Lab. c. Foundation Performance Standard. For ach foundation,the RLPE must certify ... .. - --- - .. - - •. . - - . - , . -- - . -- prepare the plans and specifications: (1) Potential vertical rise (PVR) de - ---•- - • - .• - • - - - -- Tex 124 E, Rev. January 1, 1978/December 1982, Texas State Department of Highways and Public Transportation, Materials and Test Division, "Method for Determining the Potential Vertical Rise, PVR" (a copy of which is on-file in the office of the City Secretary). For this purpose, the"dry"moisture condition(from which little shrinkage is used for each sample and test. (2) Swell tests performed in accordance with ASTM D45 , "S Stan Test Methods for One Dimensional Swell or Settlement Potential of Cohesive Soils"as last revised prior to June 1, 2004. •: a ". .. .., . - .. . .. - -. ': - - '.• • - - - '. . " ., . : : . I ". ., .. . - Methods for Determination of the Soil Water Characteristic Curve for Page 6 • • • - - ' - - - . . Hygrometer, and/or Centrifuge," as such methods were last revised prior to June 1, 2004. (Partial exception: If the basic type of found •: • " . . . • • • - • - space and deep foundations" or"structural floor with crawl space and deep•. .. ," . . . . . -- . ' ' . - --- . • . . ,• suction or hydrometer test is required.) d. Foundations, Basic Types. Each foundation . . .. . .• : .. • .•. ., . . - "- . .. .. • ! ! . - . ' - -•'. - : .' • - .., .. " .. . - . .. . . .. - -- .. '- - - ' - - -, - . . • -, - . ! • - - - - • . is on file in the City Secretary's office ("FDO"). (2) Structural finer wit -crawl space and deep foundations. (3) Stiffened structural slab with deep foundations. (4) Stiffened non structural-slab with deep foundations. storage space,not habitable space). (7) Mixed depth system for building additions with deep foundations. (8) Another type approved by special exception issued by the BSC. See "h," below. e-c.. Foundations, Deep Support Components. Deep support components must be of an approved type. Approved types are listed below. In this list,types of deep support components are defined and described in FDO. (1) Drilled and underreamed concrete piers. (2) Drilled straight-shaft concrete piers. Page 7 • (3) Auger-cast concrete piles. (4) Another type approved by special exception issued by the BSC. See "h," below. d. Foundations, Reinforcement. Reinforcement for each foundation must be of an approved type. Approved types are listed below. In this list, types of reinforcement are defined and described in FDO. (1) Deformed bar reinforcing. (2) . . ' _ . .. . :.' . _ - habitable space). (3) Another type approved by special exception issued by the BSC. See "h," below. g. e. Foundations, Observation & Certification. Each foundation must be professionally observed and must be certified by an RLPE, as more fully described below: (1) Observations must: (i) be performed either by the certifying RLPE or by one or more persons under that RLPE's direct supervision and control whose professional qualifications are approved by the RLPE (any such person may be an RLGE, with respect to geophysical matters), (ii) include actual measurement of piers, fill, compaction, reinforcement, forms, materials, dimensions, structural elements, - -_ . . - - •: - , attachments, etc. before the work is covered or concrete is placed (Note: dimensions of an underground element may be measured or estimated from the forms, boring or cavity for the element, before pouring or filling), (iii) be performed continuously during placement of concrete and any - - - •. , and (iv) be documented in a form and manner approved by the building official (which may include photographs). Page 8 • • (2) Certifications must: (i) refer to and be based upon the professional observations required by this section, (ii) state that the work complies with the plans and specifications last approved by the building official (with any field changes that are ordered by the RLPE and reported to the building official and that comply with applicable regulations), (iii) state that the work complies with sound engineering practices, (iv) comply with criteria as to form and content as may be specified by the building official, (iv) be signed and sealed by the certifying RLPE, and (vi) be filed with the building official. (3) Certifications may: (i) rely in part upon an attached certification by a RLGE, as to geophysical matters, and (ii) rely in part upon an attached certification by an A2LA Lab, as to materials testing. Before framing or other work commences atop a foundation(and before the foundation is otherwise covered),the permittee must obtain written acknowledgment from the building official that the certification for the foundation was duly filed as required above. Certifications,plans, specifications and related items may be kept on file by the City, for public inspection, for an indefinite period of time. th f. Special Exceptions. The BSC may issue a special exception from any requirement in subsection"a"through"g," above, but only upon a showing that: (1) the requirement will not affect life safety or the performance of a structure (for its estimated useful life); or (2) an alternate requirement to be imposed by the special exception will provide equal or better protection for life safety and long-term structural performance. However: (i)unless the basic type of foundation is"structural slab with void Page 9 • space and deep foundations" or"structural floor with crawl space and deep foundations," as described in this section, the BSC may not issue a special exception waiving any requirement for an RLPE or RLGE to have professional errors and omissiIns insurance in whole or in .art• and ii the BSC ma not waive any requirement for an RLGE to have such insurance. In connection with any sspecial exception, the BSC may require that the applicant provide supporting engineering data and opinion, and the BSC may impose conditions to carry out the purpose and intent of applicable regulations. Amend paragraph 4 under "International Building Code" as follows: 4. All concrete piers, footings and foundations must be cured for at least 72 hours before any significant load is placed on them. Page 10 • • Ordinance No. AN ORDINANCE RELATING TO FOUNDATIONS; AMENDING THE CODE OF ORDINANCES OF THE CITY OF WEST UNIVERSITY PLACE, TEXAS; AND CONTAINING FINDINGS AND PROVISIONS RELATING TO THE SUBJECT. WHEREAS, the building official of the City has proposed certain amendments to the Standard Codes Schedule (and standard codes that are incorporated into the Code of Ordinances by that schedule); and WHEREAS, such amendments were referred to the Building & Standards Commission, which has recommended them for consideration and adoption by the City Council; NOW, THEREFORE, BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF WEST UNIVERSITY PLACE: Section 1. The Standard Codes Schedule of the Code of Ordinances of the City of West University Place, Texas is hereby amended as set out in Appendix A, which is attached to and made a part of this ordinance. Section 2. All ordinances and parts of ordinances in conflict with this Ordinance are repealed to the extent of the conflict only. Section 3. If any word, phrase, clause, sentence, paragraph, section or other part of this Ordinance or the application thereof to any person or circumstance, shall ever be held to be invalid or unconstitutional by any court of competent jurisdiction, neither the remainder of this Ordinance, nor the application of such word, phrase, clause, sentence, paragraph, section or other part of this Ordinance to any other persons or circumstances, shall be affected thereby. Section 4. The City Council officially finds, determines and declares that a sufficient written notice of the date, hour, place and subject of each meeting at which this Ordinance was discussed, considered or acted upon was given in the manner required by the Texas Open Meetings Act, as amended, and that each such meeting has been open to the public as required by law at all times during such discussion, consideration and action. The City Council ratifies, approves and confirms such notices and the contents and posting thereof. Section 5. This Ordinance takes effect on the tenth day following its publication, as provided in the City Charter ("Effective Date"). Page 1 I • PASSED, APPROVED AND ADOPTED ON FIRST READING on , 2005. Councilmembers Voting Aye: Councilmembers Voting No: Councilmembers Absent: PASSED, APPROVED AND ADOPTED ON SECOND READING, AND SIGNED, on Councilmembers Voting Aye: Councilmembers Voting No: Councilmembers Absent: Attest: Signed: City Secretary (Seal) Mayor Recommended: Reviewed: City Manager City Attorney Page 2 • Appendix A Amendments to the Standard Codes Schedule regarding foundations 3-16-05a Note: Base draft includes the proposed new Section 3 as of 11-29-04; additional revisions after that date are marked in the text. Delete the existing paragraph 3 under "International Building Code" and insert the following: 3. The foundation for each new building(and each new addition to a building) All • :: - :.• . .. ontaining habitable space (as defined in the IBC)(or 185 square feet or more, must meet the criteria in this section, as applicable. In this section: "A2LA Lab"means a laboratory accredited by the American Association for Laboratory Accreditation on the basis of ISO/IEC 17025:1999 ("general requirements for the competence of testing and calibration laboratories"). "RLPE"means a licensed or registered professional engineer of the State of Texas who is: (1) listed with the State Board of Professional Engineers in either the civil or structural branch of engineering (but, from and after May 1, 2006, listing in the structural branch is required); (2) employed by a registered engineering firm of the State of Texas; and (3) (unless waived by the BSC as provided in"f'below) covered by professional errors and omissions insurance that: (i) has limits of at least $250,000 per claim (and at least $500,000 per year, aggregate) and (ii)has effective dates—including any retroactive coverage date—that include the entire period when the person provides services or takes actions regulated by this section. Page 3 • "RLGE"means a person who is: (1) either: (a) a registered professional geoscientist of the State of Texas, or(b) a licensed or registered professional engineer who is listed with the State Board of Professional Engineers in a relevant branch of engineering (civil, structural or geological) and employed by a registered engineering firm of the State of Texas; and (2) .. - . .' . - . -- :_ . . . •- - . . overed by professional errors and omissions insurance that: (i) has limits of at least $250,000 per claim(and at least$500,000 per year, aggregate)and (ii)has effective dates—including any retroactive coverage date—that include the entire period when the person provides services or takes actions regulated by this section. a. Engineering. Foundations must be constructed in accordance with complete plans and specifications prepared, signed and sealed • - . - .. .. •-- . - . and manual signature)by a RLPE. The plans and specifications must be prepared specifically for the site of the work, and they must meet criteria as to scope, content and form specified by the building official. If there are existing trees (either to remain or to be removed)within 20 feet of a foundation, that could affect a foundation, the RLPE must acknowledge, in writing, certify that the trees have been taken into account in the preparation of the plans and specifications. b. Basic Standards. Each foundation must be an approved basic type listed in the following chart. In addition, the design of each foundation must be supported by a geotechnical report and special engineering certification, to the extent indicated in the following chart. [Note: chart is new Page 4 • • Approved Basic Types. See Note I. Geotechnical Report. Special Engineering See Notes 2 and 3. Certification. See Note 4. Structural slab with void space and deep foundations Limited Not required Structural floor with crawl space and deep foundations Limited Not required Stiffened structural slab with deep foundations Full Required Stiffened non-structural slab with deep foundations Full Required Mixed-depth system for all new building construction Full Required Mixed-depth system for building additions with deep foundations Full Required Another type approved by special exception issued by the BSC. As specified in the As specified in the special See "f,"below. special exception exception Note 1. Approved Basic Types. Types of foundations are defined and described in"Foundation Design Options For Residential and Other Low-Rise Buildings on Expansive Soils" published by the Structural Committee of the Foundation Performance Association, Houston,Texas(Document#FPA-SC-01-0,Rev#0,30 Jun 04,marked"For Website Publishing"),a copy of which is on file in the City Secretary's office("FDO"). Note 2. Geotechnical Report,Standards. The plans and specifications for each foundation must be based on a written geotechnical report prepared,signed and sealed by a RLGE. The report must cover all testing and site evaluation,and all must meet all applicable criteria in "Recommended Practice for Geotechnical Explorations and Reports" published by the Structural Committee of the Foundation Performance Association,Houston,Texas(Document#FPA-SC-04-0,Rev#0, 11 April 2001,issued for website publishing),a copy of which is on file in the City Secretary's office. The minimum depth of borings is 20 feet in all cases. All tests and other laboratory work must be performed by an A2LA Lab. Note 3. Geotechnical Report, Scope. "Limited" indicates that the geotechnical testing, evaluation and report may be limited to a determination of the appropriate depth for the deep foundations(but the deep foundation components must meet the other criteria applicable to them). "Full"indicates that the geotechnical testing,evaluation and report must cover all foundation components. Note 4. Special Engineering Certification. Where indicated as"required,"for a particular type of foundation,the RLPE must certify that the plans and specifications were prepared to achieve a soil-caused foundation movement potential of one inch or less,and that the RLPE used the estimated depth of the active zone and at least two of the following methods to prepare the plans and specifications: (1)Potential vertical rise(PVR)determined in accordance with Test Method Tex-124-E,Rev.January 1,1978/December 1982,Texas State Department of Highways and Public Transportation, Materials and Test Division, "Method for Determining the Potential Vertical Rise,PVR"(a copy of which is on file in the office of the City Secretary). For this purpose,the"dry"moisture condition (from which little shrinkage is experienced,but where volumetric swell potential is greatest)shall be used for each sample and test. (2)Swell tests performed in accordance with ASTM D4546-03,"Standard Test Methods for One-Dimensional Swell or Settlement Potential of Cohesive Soils"as last revised prior to June 1,2004. (3)Suction and hydrometer swell tests performed in accordance with ASTM D5298-03 "Standard Test Method for Measurement of Soil Potential (Suction) Using Filter Paper" and ASTM D6836-02 "Standard Test Methods for Determination of the Soil Water Characteristic Curve for Desorption Using a Hanging Column,Pressure Extractor,Chilled Mirror Hygrometer,and/or Centrifuge,"as such methods were last revised prior to June 1,2004. Page 5 • testing and site evaluation, and all must meet all applicable criteria in"Recommended Practice . - . - . . . .. . ' .. " .. . • - . . -- . . . - -- • -• . - • • •• : - '- : - •, - • . 'on, Houston, Texas (Document# FPA SC 01 0, Rev tt0, 11 April 2001, issued for websitc publishing), a copy of which is on file in the City Secretary's office. • .. "• foundations, but they the deep foundation components must meet the other c. Foundation Performance Standard. For each foundation,the RLPE must certify that the plans and specifications were prepared to achieve a soil caused foundation movement potential-et one inch or less, and that the RLPE used the prepare the plans and specifications: Tex 124 E, Rev. January 1, 1978/December 1982, Texas State Department of Highways and Public Transportation, Materials and Test copy of which is on file in the office of the City Secretary). For this purpose, the "dry"moisture condition(from which little shrinkage is used for each sample and test. (2) Swell tests performed in accordance with ASTM D1516 Test Methods for One Dimensional Swell or Settlement Potential of Cohesive Soils" as last revised prior to June 1, 2004. (3) Suction and hydrometer swell tests performed in accordance with ASTM (Suction) Using Filter Paper" and ASTM D6836 02 "Standard Test . . . Page 6 • Desorption Using a Hanging Column, Pressure Extractor, Chilled Mirror Hygrometer, and/or Centrifuge," as such methods were last revised prior to June 1, 2004. {Partial exception: If the basic type of foundation is "structural slab with void space and dccp foundations"or"structural floor with crawl space and deep foundations," as described below, neither a PVR determination nor a swell, suction or hydrometer test is required.) d. Foundations, Basic Types. Each foundation must be of an approved basic type. - - - defined and described in"Foundation Design Options For Residential and Other ", • - -- of the Foundation Performance Association, Houston, Texas (Document It FPA SC 01 0, Rev#0, 30 Jun 04, marked"For Website Publishing"), a copy of which is on file in the City Secretary's office("FDO"). (1) Structural slab with void space and deep foundations. (2) Structural floor with crawl space and deep foundations. (3) Stiffened structural slab with deep foundations. (4) Stiffened non structural slab with deep foundations. (5) Grade supported stiffened structural slab. storage space, not habitable space). - -- . 1 I . - -- - Another type approved by special exception issued by the BSC. Sec "h," below, e-c.. Foundations, Deep Support Components. Deep support components must be of an approved type. Approved types are listed below. In this list, types of deep support components are defined and described in FDO. (1) Drilled and underreamed concrete piers. (2) Drilled straight-shaft concrete piers. Page 7 S • (3) Auger-cast concrete piles. (4) Another type approved by special exception issued by the BSC. See "h," below. d. dations, Reinforcement. Reinforcement for each foundation must be of an approved type. Approved types are listed below. In this list, types of reinforcement are defined and described in FDO. (1) Deformed bar reinforcing. (2) - : - - - -additions to buildings containing only garage or storage space, not habitable e) (3) Another type approved by special exception issued by the BSC. See "h," below. g. e. , Observation & Certification. Each foundation must be professionally observed and must be certified by an RLPE, as more fully described below: (1) Observations must: (i) be performed either by the certifying RLPE or by one or more persons under that RLPE's direct supervision and control whose professional qualifications are approved by the RLPE (any such person may be an RLGE, with respect to geophysical matters), (ii) include actual measurement of piers, fill, compaction, reinforcement, forms, materials, dimensions, structural elements, stressing, tendons, tensions, attachments, etc. before the work is covered or concrete is placed(Note: dimensions of an underground element may be measured or estimated from the forms, boring or cavity for the element, before pouring or filling), (iii) be performed continuously during placement of concrete and any - . , and (iv) be documented in a form and manner approved by the building official (which may include photographs). Page 8 i S (2) Certifications must: (i) refer to and be based upon the professional observations required by this section, (ii) state that the work complies with the plans and specifications last approved by the building official (with any field changes that are ordered by the RLPE and reported to the building official and that comply with applicable regulations), (iii) Gtate that the work complies with sound engineering practices, (iv) comply with criteria as to form and content as may be specified by the building official, (iv) be signed and sealed by the certifying RLPE, and (vi) be filed with the building official. (3) Certifications may: (i) rely in part upon an attached certification by a RLGE, as to geophysical matters, and (ii) rely in part upon an attached certification by an A2LA Lab, as to materials testing. Before framing or other work commences atop a foundation(and before the foundation is otherwise covered), the permittee must obtain written acknowledgment from the building official that the certification for the foundation was duly filed as required above. Certifications,plans, specifications and related items may be kept on file by the City, for public inspection, for an indefinite period of time. 1}:f. Special Exceptions. The BSC may issue a special exception from any requirement in subsection"a"through"g," above, but only upon a showing that: (1) the requirement will not affect life safety or the performance of a structure (for its estimated useful life); or (2) an alternate requirement to be imposed by the special exception will provide equal or better protection for life safety and long-term structural performance. However: (i)unless the basic type of foundation is "structural slab with void Page 9 S i space and deep foundations" or"structural floor with crawl space and deep foundations," as described in this section, the BSC may not issue a special exception waiving any requirement for an RLPE or RLGE to have professional errors and omissions insurance, in whole or in part; and (ii) the BSC may not waive any requirement for an RLGE to have such insurance. In connection with any sue-special exception,the BSC may require that the applicant provide supporting engineering data and opinion, and the BSC may impose conditions to carry out the purpose and intent of applicable regulations. Amend paragraph 4 under "International Building Code"as follows: 4. All concrete piers, footings and foundations must be cured for at least 72 hours before any significant load is placed on them. Page 10