1963 825 Ordinance - Laserfiche WebLink

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three inches. The contract price per measured square yard for reinforced col,••- crete pavement of the specified thickness shall cover all cost of material and the placing; of same in the concrete pavement. ~. JOIAI~S: ~~rpansion, contraction, longitudinal key and construction joints sizaJ_1 be made in accordance ~rrith the standard and detail plans a.nd as herein specih~u~ Tl~e plane of. all joints shall be at right anJles to the surface of the pavemc~x:- Ea) LONGITUDT1~iAL hEY JOINTS: These specifications contemplate the construction of the concrete base in t~rJO izalves by separate concreting operations, and longi• tudinal joints of the lcey type shall be installed along the center 1i ne of pavr~•- ment. This type of joint shal]. be constructed by the use of a form either of metal or other suitable material to the di_*nensions shoti~.m on plan. ~,:aximLm~ error in alignment is 1/2 inch in ~0 feet. Tie bars of 5/8 inch round, deformed bars, made of billet steel shall be installed at intervals of ~ feet along said center line of pavement, except zrrhere such location coincides with transverse joints. TheT~ shall be held firiTi7_y in place by means of a. device satisfactory to Engineer. Their s:r.all_ be ~. feet long extendin~~ 2 feet on each side of center liT_le of pave?~~en~~ and shall ~e placed in the center of the concrete slab a.nd at right an~~_es to t~l~s center line of pavement. The tie bars must be straight Z~rh.en p7_aced . Prior to pla.cin~ contr. to for the adjacent half of pavement any bent bars shall be str~~~.i~;l-itened by means of a pipe slipped over the free end of the bar. Key joints shall be painted ~,aith (2) coats of bituminous material a.s per the requirements of said State Hightivay Specifications, Section ii-5.6 F-2 before the secofid half of pavement is poured. (b) COPISTRUCTI01`1 JOINTS: At the end of e~.ch dayts concreting operations or at any time when the placing of the concrete is suspended for ~~ minutes or :Wore, transverse construction joints shall be constructed: These joints shall be formed by means of a well braced bulkhead, conforming to tlze, camber of cross section, constructed so as to ermit dowel 'oars to extend through the joint. The dogrel bars shall be 3/I~ inch round, straight, smooth bars free from burning and flattening at ends, urith oz:a-half co~:ted ~;rith suita'le bituminous material or vrith a.n oil such as 600'~'l. I~do dogrel socket or expansion cap ~~rill 'oe required v~rhen used in such construction joints. P;o.construction joint shall be placed • closer than 7-1/2 feet to a parallel joint. The- dog^rels sh,~.ll be 15 inches long, extending 7-1/2 inches on each side of the joint, a.nd shall be held by proper supports so as to be in the center of the concrete slab and perpendicular to ti ', joint. They shall be spaced 15 inches on centers ?rritl~ encl spaces not less than 3 inches nor more than 10-1,/2 inches. (c) TRANSV;i%SE CONT~ ~~CTIGIJ JOIivTS: Impressed contre~ction joints shall be con- structed at 1.0 foot intervals from t'_oe erpansio_r~ joints znrith not less than 7 nor more than 15 joints construc•ed bet~~~~!een expansion joints. Ido such contraction joint shall be placed closer than 7-1/2 feet to a construction joint. In such cases the construction joint shall take the place of -the contraction joint. The contraction joint shall be of the i*npressecl t ;~~~e made by forming in the surface of the slab a slot 1/~ inch •~rri de at the bottom a.nd ~~/8 inches aide at the top. The slot sha.11 be 2-3/!~ incho:s in de•~th. The impressing device shall be removed as soon as the concrete has set sufficiently to preclude -the possibility of injury to the concrete. The grove formed bjT the impressi_nL; device sl•iall be kept free from dirt or foreign matter until the filler is 1~laced as hereinafter. directed. Doi~rel bars shall be used and installed as specified in Item ~ (b) Con- struction Joints, above. '. CP-9