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~". ;.1 material used for :'acing a._airrst the concrete shall be surfaced and
<br />s}r~rl1. be securely held to line by timbers or studding so that n.o bulging; or
<br />>preading results from the pouring of the concrete. ?~alzen requirod by the
<br />~_r~~;ineer, forms for surfaces of concrete to be exposed in 'the finished work shah.
<br />l:a su_rfaced with i+iiasonite, Prestwood or -plywood. Forms shall be tight so as to
<br />Prevent v;~ater and cement from escaping. Bolts or tie rods shall be used to tie
<br />fa1~res to~c~ther and shall be so made and placed that they tivi.ll leave no r;retal
<br />vrithin one ir:ch of the surface of concrete. hui_rin~~ of forms will. be a11.oLVed or.L~l
<br />by permission .of the bnhineer.
<br />(e) P?.,1{CI?`"IG COi:CIti~'~~; Larth foundation. beds shall have al]_ loose material re-
<br />moved a.nd shall be inspected by the ~rLgint~er before any concrete is placed.
<br />'fJl.en~ti~;uter collects in the e;:cav~;tior., ~.t shall be removed before an.y con-
<br />c-reto i.s placed therein. ;~aixen there i.s a. cont_nuous i:lo~^r of ~ti~ater into tyre ex-
<br />c.:atrati.on, a po~~ver driven ~~am;.~in~_ unit, of approved d~osiE;n, s}~rall be 71rovided.
<br />Concrete shall be handi_ed ~:ror:: t}re rni.?;er to 1:~1ace as rapidly as practicable
<br />ar:d in a. manner that tVill pr:ve~~rt se~:x~o~-at•:~<rn. Concrete sl_all not be dro~?,;ec1
<br />frcr~t a ;~roater heit_ht t:::in six (b} f yet. T,Le concrete s}-,.al_1 be t}?o:cou~•1~x1~j
<br />spac'..ed a.~~:x:inst the i'orrns, or vi:;rat,ed ~~ait'r_ rnec'r:an:i.ca1 vics..tors, as -the ~,ngi_neer
<br />matt d1_rect. ill reinfo:rcemer_t s?.La~.l be carefully a;:r! accu:ratcl.,y set as;d. ri},•;irtly
<br />}~s1_ci in i~::.are. Construction jo~_rits sl:a.ll be scr,abbe<; vra_th 1.~rire bruslLes, or
<br />c.leane~. Frith a staarn jet, a?Ld zve-l_l. ,''P'outed bef c;re adcl_i.,~ ne7?r e oncrete .
<br />(f) 'tG.iLIt I' ~~;~1_,Zl~'"".;G iU'.~.,:i~.['},.;il: Unless c?ther:n.„e specif~;.ed, concrete ti:•hen
<br />deiLOS:ted sra.11_ have a tem;~.:r~,.t,.tre Gn not less tl,.ari .x:rfty degrees (50°) r~'aliron-
<br />he:i.t, r~or ;gore than one irur_dreca a. d. fifteen d.e~:rees (1J_'~°) .t•'ahrenhei_t. In
<br />freezi.r:~•~ 4~reat:~?.er, suitable r,~eans s11u11 be proviclecl for rlairitainin~~; the r.,oncrete
<br />a.t a tern,~erature of forty-fivo de~-rees (l.~5°) Z' aLrer?heit for c-L r~er i od of not less
<br />tYia.n seven (7) dad-s. l;~lethoc's of her_tin~-; shall be sub~~ect to ap~rova]_ 01' the
<br />r~r~~:i.neer ,
<br />rry concrete r~hi.ch ri.ay be dar,r.e:.F;ec,: by .L.rest action shall be rerl~.ced b,~r the
<br />Coat-°aotor at his oven ex~~;nse.
<br />(g) ;,'~i)T??,C1I01~T !~IVD CL'~'.%TG: 1-Lll concr~:te she:~11 be arotoctoii and shall i?e nro-
<br />ps:,~ly cur. ed b~T sprinltlinF: or. by covering; v;~.th ti^ret burlap or cotton rna~ts, sisal-
<br />1<_r«ft p:?.l~er or one hundx°fd. l~~srcelit sl?.l.~h:..t~: }~iz'alt ~,a.nE:r ce;iented z~rlth a. suitable
<br />bitur:rina<<s material for a period of not less tlrarL se-~~en (7) days, unless other-
<br />v~r_se pex~raitted bzT the ~n~;ineer.
<br />17. F':~i.~~•iCti COP~rT?~CTl'ui~iC ~:TD R1ST~,S:
<br />Vitrified Y-branches, of the si:z:: specified, shal~_ be installed at the
<br />locations s1LOZ°,r? orr the plans, or as directed by the Ln~:~.-ir?eer. '.';he:ce conrr. ete
<br />pipe is used for the ma:i.n sewer constrr1cti ors, vitri.fi.,,~i 1:?:i.l.e "`_" saddle slants
<br />s'iali be used. %1l1 Y-Brunch.c;s and slants sh:~.ll 1:~~~ 1:'~.rr11~ s,?:~}?orted by a fill. of
<br />Class "L" concrete, extendir+r~;• :'rcm the bott::?.,, of the serer trench toa point
<br />3" above the hub of the spur of the Y-I3rancr oz' slant . OperL:ings at the outer
<br />end s}:all be closed with vitrified stoppers <xnci sealed v;~ith an approved 'oit~uninous
<br />corxpound. ;`hen required, on acec~unt of the depth of the sever, branches shall
<br />be built up vertically v:~ith vitrified riser pipes to a 1?oi_m`, at least nine (9)
<br />feat below the to?? o:I' the curb or ground su:cf•ace, usin;. ~ tiJE;iLC7.s ti^~nerever necessary.
<br />The riser pipes shall be recesseci into the na:rlc of the serer trench and encased
<br />with Ciass "C" concrete for their full hei`<.h-t, The cost of concrete encaser:lent
<br />for risers, and the cost of concrete supports f..'or Y-BrrL~:xciles and slants, shall.
<br />be included in the con%ract unit price for t}Lose iter:LS. ±~11 material and vrorlc-
<br />manship shall conform to t}-re s~necifications .for vitrified pipe sevrers.
<br />S - 12
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