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Ord G-89(25-49)
O~DIMAEC~ NO. 0-89 AI'~ ORDII~ANCE OF THE CITY COUNCIL OF THE CITY OF DroLl{AY REACH, FLOR. IDA, ~RESCRIBI~G SPECIFICATIONS FOR CONCRETE BLOCK A[~D OTHER i~,2ASO~,iRY COiiSTRUCTION IE THE CITY OF DELRAY BEACh{, FLORIDA, i~ROVID- Iii, G S~VmRADILITY CLAUSE AND ~ROVIDIi~G FOR A PENALTY FOR THE VIOLA- TION THEREOF. That in order to provide more uniform specifications and specifications of a higher standard for concrete block and oth, er masonry construction in t~e City of Delray Beach, Florida, it is therefore, ORDAI~ED BY THE CITY COUNCIL OF THE CITY OF DELRAY BEACH, FLORIDA, AS OL~O'~: Section 1: That no concrete block or other masonry construction shall be used in the erection or construction of any building within the City o£ Delray Beach unless said concrete block or other masonry construction shall conform to the following specificatior s. Section 2 (a) ~'~ Ii'~b~ ~ Compressive strength: ?he average compres- sive strength of concrete block units laid up in the wall shall be 600 lb. per square inch of gross area. Absorption: Concrete block exposed to weather shall have a maximum absorption of 15 lbs. of water per cubic foot of concrete. (b) ALLOW'ASLi;~ UNIT STR~SSm~ Compress..ion: In concrete block walls and piers subject to axial loads, the average un£t compressive stress shall not exceed 1OO lbs. per sq. in. for lime-cement mortar, 150 lbs. per sq. in. for cement mortar. ~ unit shear in co~crete block Shear: T.~e masonry shall not exceed one-tenth (1/lOth) the allowable unit compressive stress. Bearing: The unit bearing stress in con- crete block masonry supporting beams, columns, and other concentra tions, and the maximum stress in masonry walls and piers including stress due to calculated bending and eccentric loading, shall not --1-- exceed, by more than twenty-five (25) l;,ercent, the allowable aver- age stress given in this ~ctlon. Concentrations: In concrete block walls, reinforced concrete supporting members shall be l~..rovided under all load con- centrations, which when calculn_ted over ~ l~'ngt~{ of wall not more than the actual bearing or more than twice the wall thickness and combined with other loads would otherwise exceed the allowable compressive stresses of this Section. T~ickness: Concrete block walls shall have a least. thickness ss specified elsewhere in the Section. The minimum thickness for masonr,z bearing walls shall be ei~ht (~) inches and for masonry piers shall be not less than one-tenth (i/lOth) of the unsupI~orted hei2~ht. Section 3.~'~ ~',~,~ ,~.,v.~...~ ~,:~ ~ A~CHES: Load bearing masonry arches in ,-~a!l or floor construction shall not be permitVed exce?t 4ith the special permission of the Puilding Inspector and then shall be subject to such requirements as he may t}rescribe. Section ~. 2Eii'~FO~iCED i~SO~,~Y: Such types of reinforced lintel and pier block construction as have been accepted by the City~ upon recom- mendation of a registered Florida construction engineer, may be permitted in lieu of the ]>oured horizontal and vertical rei~'~force- ment specified in this Section~ but its use shall be limited to one- story residential construction, conforming with the ~eneral sI~acinS requirements noted below, and subject to such further re- strictions as bhe buildin[_l Inspector mai,~ require~ Section 5. SECOi~D-HA~,.D i~SOi~RY I.~TERIALS: Second-hand brick, stone, block and other mgsonry unites shall not be used in masonry' unless they conform to the requirements of this Code, are sound and clean, and apI)roved for use by the Suilding Inspector. -2- Section 6. EXTERIOR WALLS, LOADI~G-BEARI~G AND FIRE WALLS: General: Masonry walls constructed of sol- id or hollow units or of poured concrete and used for all exterior and load-bearing or fire-separation purposes, shall comply with the requirements of this section, shall have a minimum thickness of eight (8) inches and shall be reinforced with a reinforced concrete £ramework in the wall so that there shall be not ~re than eighteer (18) times the wall thickness between any two horizontal members nor more than twenty-two (22) times the wall thickness between any two vertical members. No roof or other members shall be so placed as to develop any direct thrust against walls. Restrictions: Load-baaring masonry walls shall not exceed a total height above grade of forty (40) feet, exclusive of parapet walls, and such walls which are forty (40) feet or less in height shall be considered as load-bearing unless specifically designed and constructed as part of a skeleton frame% Section 7. REINFORCED COZ(CRETE FR~WORK; Horizontal ~%embers: Horizontal reinforced concrete members, as part of the framework required in this Sec- tion, shall be located at each floor and roof level and at such in. termediate levels as may be required to comply with the maximum spacing of eighteen (1~) times the wall thickness. Such members shall be continuous in all exterior load~earing and fire-walls and shall comply with the requirements below as to minimum dimensions, areas and reinforcing. The reinforcing shall be divided to four (~) bars and shall be located in the corners two (2) inches from each face. Reinforcing bars shall be securely held in place by approved suspension wires. Splices shall not be less than forty (40) diameters. Changes in the level of horizontal members, with- in the allowed limits, shall be made at vertical members and no inclined member shall be considered as replacing a horizontal one. Vertical Members: In one-story concrete block residential construction, where the total wallheight does no1 exceed 10 feet between the top of the footing and the bottom of -3- the tie beam, the distance between vertical reinforced concrete members may be increased to thirty (30) times the wall thickness, except at points of concentrated loads as provided above, and ex- cept that $~' x 12" poured jambs shall be required for all open- ings wider than 6~ feet, and for all corner openings. Building walls which have a height exceeding ten (10) feet shall have reft4 ical reinforced concrete members at such points as may 'be necess- ary to comply with the maximum spacing of twenty-two (22) times the wall thickness. In all cases where corner openings are used without corner support, vertical members shall be provided adja- cent to each such opening jamb. Such members shall be continuous from the foundation through the full height o:? the wall exclusive of any parapet wall and they shall conform in dimensions, area, and reinforcing to the requirements below. The reinforcing shall be divided to not less than four (~ bars for wall columns, all of the bars in one (1) column to be uniform in size and to be lo- cated at the corners two (2) inches from each face. Reififorcing bars shall be held in place by not less than one-fourth (]-/4) incl hoops spaced not over two (2) feet. Splices shall be not less th~ n twenty-four (2~) diameters and all such members shall be dowelled to the foundations with a nu~er and area of dowels at least e- qual to 'the reinforcing required for the colu~n. ;,~en necessary, such vertical members may be offset at horizontal members to avoi( openings, but the minimum spacing shall not: be exceeded nor shall any such offset member be located over an opening, in a load- bearing wall below. Exceptions: Bonded corner block construc- tion, or approved corner pipe columns continuous from footing to tie beam, will be accepted as required vertical reinforcing. Section 8. Sizes of ~'iembers. Horizontal and vertical members of the framework shall at least comply with the require- ments of the following table: REI?~FORCED CO~CRETE F~A~Ei~ORK Total ~all Horizontal I~embers Vertical ~[embers Height ~inimum ~£~imum ~inimum ~imimum Y~in. D~in. Dimen- Cross ~ein- Dimen- Cross Rein- Exclusive sion Area forcing sion Area forcing of Parapet (inches)($q.in.) (Sq.in.) (inches) (Sq.in.)(Sq.in. ~.~inimum $ 96 O.9~ ~ 96 1.0 Up to 20' ~ 96 O.9~ 8 96 1.0 Over 20' 8 128 1.2 8 144 1.2 Horizontal members shall be considered adequate to sup. port normal loads over wall openings not exceeding 6½ feet, and corner openings nov exceeding ~ feet. provided that the top steel reinforcing area in cantilevered corner members shall be a mini- mum of 0.59 sq. in. ~ere openings greater than above mentioned are to be used, the horizontal member shall be investigated as a beam. Where, for architectural reasons or otherwise, it is desirable ~o reduce the area of any member of the framework be- low the requirements, the Building Inspector maygrant such reduc. tion, provided that the area of concrete omitted shall be replace~ by reinforcing or structural steel in the ratio l:(n-1). Piers: ~en openings in walls are so ar- ranged as to leave sections of wall which are less than two (2) times the w~ll thickness, such sections shall be of reinforced concrete constructed as required for vertical members. Chases: The maimum allowable depth for pipe chases in concrete block walls shall be one inch (1"). Wall Additions; ~ere new walls are con- nected to existing walls, such connections shall be by means of a vertical reinforced concrete member. Proper provisions shall be made for possible settlement and for lateral stability of the wall Section 9. PANEL WALLS: Exterior concrete block panel walls in buil~ ings of skeleton frame construction shall not exceed eighteen (18 times the wall thickness in height nor thirty (30) times the wall thickness in length, and shall be bonded to the frame members by -~- .... one inch (1") deep by three ~.nch (3") mortar keys provided ,in these members or by two one-quarter inch (1/4") dowels every third course, Sectiom; 10 FARAPET ~' ~ © Nasonry parapet walls shall be not less than eight (~) inches thick and iff over 36" above the tie beam, shall be reinforced with vertical reinforced concrete members as required for building walls ~hich are less than twenty (20) feet high as specified in this Section and shall be coped with a rein- forced concrete member not less than thirty-two (32) square inches in cross-sectional area, which coping shall be reinforced with not less than two (2) one-half (1/2) inch round bars placed at the mid-height and two (2) inches from each side. The reinforcing of the vertical members shall be well anchored in the coping. Section 11. GABLE ]gALLS. Gable walls, which have an area in excess of fifty square feet shall have inclined members at the top of 6~ sq. in. minimum area, with t~{o 1/2" bars. Section 12. Severability. Each of the provisions of this ordinance are severable, and if an~_ :.. provision shall be de- clared to be invalid, the remaining provisions shall not be affect. ed but shall remain in full force and effect. Section 13. i~epealin~{ provisions: Ail ordinances or parts of ordinances in conflict with this ordinance are hereby re- pealed. Section 1~. Penalty. Any person violating any of th~ provisions of this ordinance shall be deeraed guilty of a misdemean- or and upon conviction thereof shall be fined not exceeding Five Nundred (,~500.O0) Dollars or b~r imprisonment in the City Jail not exceedinS thirty (30) days, or by both such fine and i~,prisonment. PASSED in regular session on the second and final read. inS on this the 2$nd day of Nov~ber, A.D. 19~9. 1st Reading - OctOber 11~ 19~9. 2nd Reading - November a~, 1949. ~asse,~ and approved - November 22, 19~9. Affidavit of Puh|ication DELRAY BEACH NEWS Published Semi-weekly Delray Beach, Palm Beach County, Florida* STATE OF FLORIDA COUNTY OF PALM BEACH Before the undersigned authority personally .............................................................. of the Delray Beach News, a semi-weekly newspaper published at Delray Beach in Palm Beach County, Florida; that the attached copy of advertisement, being a Ordinanco G-89 City in the matter of of Dolray Beach Om,,N~.~'C,~ ~'O. C~ .......................................................... AN onr>maNC~ OF TU~ mTY COV'~- CIL OP THE CITY OF DELRAT t~EACI~L FLORIDA, PRESCRIBING ....................................................................................... SPECIFICATIONS FOR CONCRETE ~LOCK AND OTHER MASONRY STRUCTION IN THE CITY OF ................................................................................. RAY BEACH. FLORIDA. PROVIDING SEVERABILITY CLAUSE AND ~RO- VIDIN~ FOR A PENALTY FOR in the ...................................................... Court, VIOLATION THEREOF. The above Ordinance is published by cap- tion only. Copy of same is on file in ~the was published in said newspaper in the issues of city Clerk's office for inspection o~ intel'- by tho City CoUncil at a meetigg held ................................................................................... RUT~ R; SMITH Affiant further say~ that the said Delray Beach News is a newspaper published at Delray Beach, in said Palm Beach County, Florida, and that the said newspaper has heretofore been con- tinuously published in said Palm Beach County, Florida, each week and has been entered as se~nd class mail matter at the post office in Delray Beach, in said Palm Beach County, Flor- ida, for a period of one year next preceding the first publication of the attached copy of adver- tisement; and affiant further says that ._~h~ ..... has neither paid nor promised any person, firm or corporation any discount, rebate, commission or refund for the purpose of securing this adver- tisement for publica ' n in the id spaper. Sworn to and subscribed before me (S~) ~ Nota~ ~ublic