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Home My WebLink AboutOrdinance - 8323-1982 - Ord. Amend. Chap. 5 By Amend. Sec 5-2 To Prov. Amend. To 1979 Ed. Build. Code - 05/13/1982II . Amends Ord. 7999 SMH:da ORDINANCE NO. 8323 AN ORDINANCE AMENDING CHAPTER 5 OF THE CODE OF ORDINANCES, CITY OF LUBBOCK, TEXAS, (BEING THE BUILDING CODE) BY AMENDING SECTION 5-2 THEREOF TO PROVIDE FOR AMENDMENTS TO THE 1979 EDITION OF THE UNIFORM BUILDING CODE; PROVIDING A SAVINGS CLAUSE; AND PROVIDING FOR PUBLICATION. WHEREAS, the City Council of the City of Lubbock has found that the changes indicated below would be in the best interest of the citizens of the City of Lubbock; NOW THEREFORE: BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF LUBBOCK: SECTION 1. THAT Section 5-2 of Chapter 5 of the Code of Ordinances, City of Lubbock, Texas, which amends the Uniform Building Code, 1979 Edition, BE and is hereby amended by repealing the present Section 2405 of Chapter 24 of the Uniform Building Code, 1979 Edition, and by adding a new Section 2405 to read as follows: "Unburned Clay Masonry Sec. 2405 (a) General. Masonry of unburned clay units shall not be used in any building more than (2) stories in height. The height of every laterally unsupported wall of unburned clay units shall be not more than 10 times the thickness of such walls. Exterior walls, which are laterally supported with those supports located no more than 24 feet apart, are allowed a minimum thickness of 10 inches for single story and a minimum thickness of 14 inches for the bottom story of a two story with the upper story allowed a minimum thickness of 10 inches. Interior bearing walls are allowed a minimum thickness of 8 inches provided that the same height/thickness ratio as exterior bearing walls is maintained. (b) Compressive Strength. The units shall have an average compressive strength of 300 pounds per square inch when tested in accordance with ASTM C67. No more than twenty percent (20%) of the samples shall have less than 250 pounds per square inch compressive strength. (c) Module of Rupture. The unit shall average 50 pounds per square inch in modulus of rupture when tested according to the following procedure 1. A cured unit shall be laid over (cylindrical) supports two inches (2") in diameter, located two inches (2") from each end, and extending across the full width of the unit. 2. A cylinder two inches (2") in diameter shall be laid midway between and parallel to the supports. 3. Load shall be applied to the cylinder at the rate of 500 pounds per minute until rupture occurs. 4. 3WL The modulus of rupture is equal to 2Bd~ W • Load of rupture L = Distance between supports B = Width of brick d • Thickness of brick (d) Soil. The soil shall be a suitable mixture of clay and sand. The soil used shall contain not less than 25 percent and not more than 45 percent of material passing a No. 200-mesh sieve. The soil shall contain sufficient clay to bind the particles together and shall not contain more than 0.2 percent of water-soluble salts. It shall have sufficient bonding strength to insure that the adobes shall not crack or crumble. (e) Adobe. Adobe is defined as unburned clay masonry made of soil to which admixtures are added in the manufacturing process in order to limit the adobe's water absorpti_on to comply with paragraph (g) below. Exterior walls constructed of treated adobe require no addi- tional protection. Stucco is not required. The mortar shall be a minimum of the same quality as that of the brick. (f) Moisture Content. The moisture content of the unit shall be not more than four percent by weight. (g) Absorption. A dried four-inch (4") cube cut from a sample unit shall absorb not more than two and one-half percent moisture by weight when placed upon a constantly water saturated porous surface for seven (7) days. (h) Shrinkage Cracks. No units shall contain more than three shrinkage cracks, and no shrinkage crack shall exceed three inches (3") in length or one-eighth inch (1/8") in width. (i) Foundations. Adobes shall not be used for foundation or basement walls. All adobe walls shall have a continuous concrete footing at least eight inches (8") thick and not less than the walls above. All foundation walls which support adobe units shall extend to an elevation not less than six inches (6") above the finish grade. Foundation walls shall be at least as thick as the exterior wall as specified in Section 2405(1). Where stem wall insulation is used, a variance is allowed for the stem wall width to be two inches (2") smaller than the width of the adobe wall it supports, but in all cases shall be sufficient to support the loads to be imposed. (j) Exterior Walls. All walls of adobe shall not have thicknesses less than that allowed in paragraph (a) above. Mortar shall be in accor- dance with paragraph (e) above. All adobe brick shall be laid up with full slush (bed) joints and shall be bonded (overlapped) not less than 4 inches. All walls of adobe must also be laid up with full joints. All adobe walls shall be topped with a continuous belt course or tie beam (except patio walls less than 6' high above stem). At the time of laying, all units shall be clean and damp at the surface. , -·, (k) Concrete Tie Beam. Shall be minimum of six inches (6") deep by width of wall up to ten inches (10") wide. All concrete tie beams shall be reinforced with a minimum of two no. 4 reinforcing rods at each floor and ceiling plate line. Provisions for uplift pressure shall be made. (1) Wood Lintels or Tie Beams. Shall be a minimum of six inches (6") deep by wall width up to a ten inch (10") thickness. The wooden tie beam shall be overlapped, or spliced, at least six inches (6") at all joints. All joints shall have a wall bearing of at least twelve inches (12"). Wood tie beams may be solid in the six inch (6") nominal dimension or may be built up by applying layers of lumber. No layer shall be less than one inch (1 ") nominal. Wood joints, vigas or beams shall be spiked to the wood tie beam with large nails or large screws. Provisions for uplift pressure shall be made. (m) Plastering. Plaster may be applied to adobe surfaces provided that it is applied over a lathe of a minimum of 20 gauge by one inch poultry netting attached to the adobe 1611 on center, both ways with one and one-half inch nails. (n) Methods of Attachment. All methods of attachment to adobe shall be detailed and subject to approval by the building official. (o) Testing. The building official shall select 5 adobes from every 5000 adobes manufactured on site for testing. There shall be one series of tests per every 5000 adobes manufactured. (All 5 test samples) The adobes tested shall be tested in accordance with ASTM C67 and shall further meet the criteria established in Sections (b), (c), (f), and (g) above. All tests shall be conducted by an approved testing laboratory. Copies of all tests shall be submitted to the building official for review prior to the use of the adobes." SECTION 2. THAT should any section, paragraph, sentence, clause, phrase, or word of this ordinance be declared unconstitutional or invalid for any reason, the remainder of this ordinance shall not be affected thereby. SECTION 3. THAT the City Secretary is hereby authorized to cause publication of the descriptive caption of this ordinance as an alternative method provided by law. ... . ~ l , AND IT IS SO ORDERED. Passed by City Council on first reading this 13th day of --~MaaY~---------- 1982. Passed by City Council on second reading this2Zth 1982. ATTEST: -~ reasurer APPROVED AS TO CONTENT: Coker, Building Official APPROVED AS TO FORM: Susan M. Horton, Asst. City Attorney day of __ ---:::Ma::.r.y _______ , THE STATE OF TEXAS COUNTY OYJ LUBroc~ Before me onn e cKee a Notary Pubh .... ,,, .... 11 .. •'-•' Lubbock County. Texas on this day personally appeared Tt111 ~ F~t lr.cmt Accovnt Menel!er of the Southwestern Newspa- pers Corporation. publishers of the Lubbock Avalanche-Journal Morning. Evening and Sunday, who being by me duly sworn did depose and say that said newsLaper has been published continuously for more than fifiJ.:tw£ ~ecl<) prior to the first ins~tti.Qn of this el!el Notice•J21. vordtf.'S4C Per wer $ 7 .3 -· No. ~S7972 at Lubbock County. Texas and the attached print- ed copy of the Notice is a true CO.PY of the original and was printed in the Lubbock Av~2%<ia-Journal on the following dates: .Mav · 29. a· June 5 t 1982. LUBBOCK AVALANCHE-JOURNAL Southwestern Newspapers Corporation '' 1l' , •• Su~~~belr'and<s,rorn to before me this 14tb day of _II_J_un__,...e __ > .S; . ·. . ·.:: lf~ 1JJ~ku FORM58-10 ' BOffNIE lldCEE,. NOTAIW PUBUC IN AND f'OR THt STAtt OF 1'f:XAS MY COMMl$S10N EXPfRES NOV. 10, 1184