1957 566 Ordinance - Laserfiche WebLink

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(€;} JO.~.I~a IN .t'I'tiL.~~1i~IG '~VLP.THEl3.: Unless others^rise specified, concrete vrhen de- positee~. shall have a. temperature of not less than 50 degrees Fahrenheit, nor ::rare than 115 degrees I~'ahrenheit. :In freezing ti,^eather, suitable means shall be provi_:led for maintaining the cb?icret.e at a. temp::rature of 11.5 degrees Fahren- heit' for a period of not less than seven (7) d•7ys. Cons'L-ruction rnusf, stop if the temperature falls to 36 degrees ~,ahrenheit. AIo frozc~r.. materials shr:1.1 be used in the. concrete nor shall concrete be laid on :£ro,en r;rol~.nd. An;r cone:°ete ti~hich r~:ay be damabed by j'rost action shall be re- placed by the Contractor at his ovm expense. y (h) TORTS: Contractor must use ster.l fcrr:~s, of an approved section, ror both s'l;raigl~t and r. a.d:ial ~~rork, if concrete i ritegra,l curb is used , or if Contractor e~~.ec'ts to install sandstone curb after •tlie concrete pavement is c:onstructed.. The steel forms must be str~.i~ht and of a deptiZ equal to 'the thickness of the pave- ment. ~'Orn15 having a. d~:;~th .;renter. than the tha.c?.ness cf concrete pavement can. be used if the outer. edge of pavement is increased. to equal the death of form on a taper of 1 foot ii ~s^idth to each inch in depth. !'ill steel forms must be clean and coated ~.~rith a suitable oil before 'tkre f,la.cin; of concrete. The forms must be securely braced aric< held to the ex~~,.ct line ~rnd ~;.rad.e of street and ti~ahen tested ~nrith a 10 foot s'trai~,ht-edLe sha:1:1 siloti~r no ~rariance of more than 1/8 inch from true pl^ne. The forms must be supported on thoroughly co?~rpacted material for their. entire length. The space to be filled l~~rith conc~ote must be free from all rubbish or debris at the time the concrete is placed. .Pawns sh~:~ll not be removed until 2~. hours after. the concrete pavement h^s been pl.acecl. (i) CI'ICI{1i~7G SU.~CI?AZ)~: The Contractor shall f urn.ish tend use a subgrade teml~'Lato, a.s above described, upon tl.e road bed iznmedia.tely ahe?d of the concrete '^~rork. Any corrections in the surface of the sub~r^~cle roust be mad.e'rrith hand tools the filling of depressions must be :node ti^rith concrete, cruuheG. stone or slag. Larch or other soft material7. shall not be used in rectifying; sub~;rade d.epressior?s a..fter rollinL has been corap].ete;z. This chec'.rin{; of subgrade shall be a part of the Contractor ~ s obligation and .Host at all ~tirnes be kept at least 20 feet ahead of the concrete being laid. (j) SP~.r.Y: llurirg c?ry ~:^e<~•L'her the subgr~~de shall be kept ?no:;.st b}T spraying, but on clay soil such operations mu,t ?~e done during thE: noon period or after tl~e d3y~s tarork, in order to allot~r e~:cess t~•rater to be absorbed. ~~~'rrenever sprayins is specified it contemplates the use of a device that grill throT~a fined raivideu' jets of u~ster over rel,~tively la.rbe areas; the flooding of rlateri,:~.ls of surfaces b~ solid streams of vratei^ tivill not be allo;~red. (lt) PLACING: Upon the px~epared sub~rade, and only ashen the. sub~,r.~.de is moist, the mixed concrete shall be deposited rapidly to the requ'~red depth and fo.r 'the entire i°ridth of th.e pavement sections in successivr-, batc'.i~:s ~~ncl in a. continuous ope.rat.on. The use of intermediate forms or bulkheads, bet~aeen joints, ?^rill not be permitted except as sl1o,^m on the plans or other~;*ise specified. ?~~Thile being deposited the concrete shall be vigorousl~~' manipulated T~~ith spades or other suitable tools to prevent the form::-:tion of •roids or honeycombed sections. Special t~ttention shall be ~;a.ven to the co^rpacting of the concrete against .forms, curbs, street castings rend jo7:nts. In the event of an interrui:tion in the delivery of concrete or an~r mecha.ni cal difficulties ~~rl-,ich result in s'boppin,; concrete operations for more than 30 minutes, a t.rr~.nsverse construction joint slla.ll be formed as specified. Any concrete ~^~hich has been delivered in quant:it:i.es in excess of that needed to CP-1 ~