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Passing 1<l0® ~0 sieve rorr~ 10;5 to 30~
<br />Passin€ No.. 100 sieve from 2~ to lOj~
<br />Clay' & Sil-~, Y~,y weight not over 3;a
<br />(e) C011RS:~ t;*C~CP~:~C7.~+';1j. Coarse a{:€;regate for concrete work may be l,;i~y,k4:`} s"~ ,+le,
<br />b)_ast furr}~.~e sl~.,~: p~~ ~;x•avelo It shall be clean, free from loam, ~~.~y, ~~~;~t,
<br />or€;anic ma~~t~~:r or g1~Y}~~ injurious impurities. Stone shall be harm ~~-In~~tq}~r;,~
<br />trap rock or granite q Slab; shall. be air cooled blast furnace sl~~;; ~.•l~~l~a ~,c~u~~~.,
<br />uniform )rn density s.~4I .free from thin, elongated or glassy pieces; and must
<br />wei-•ht not less than ~:i~hteen hundred (1800) .pounds per cubic yard. Grayc~l
<br />shall be clean silica, screen ~,~ra.shed, sound and h.-ard and acceptable to 'thy.
<br />L,n~;ineer. ~1ny material u::ed sl~~a11. b~~ so placed when del_~vrred that it will
<br />not 'oecome contatninat:ad by earth., 1•r.~.ss or otilc:r foreign substance. STZ.~:
<br />For use in concrete pine, or in ,Rrorlc less than ei,:ht inches (3") thick, all
<br />aY;~re~~zte shall pass ~. one inch (l.") screen anc. be ret<rined. on a one=quarter
<br />inch. '(1/la.") screen. Ivor 1ar1.•er Tn~orlc the a{•~:rsi~<:;te shall rangy ~: from a size
<br />'which ~~ra_ll pass a ttivo inch (2") scre~:n and be r:~trLiried or? ~~. one-quarter inch
<br />(1/~") screen. 11^he voids in loosel~l placed :~,>;~;r.o.s_;~.te x174.11 not exceed- forty
<br />five p~srcent (~~5) .
<br />(f) CINJ;iJ:~.S: L'inders shall be only those from ~~. I~ovrer plant a7:~cl not those from
<br />stoves or Yiousehold :furnaces. ihe~< shall. be bl<;.ck and fr~~s. :prom clinltelS,
<br />unburned coal, Flue dust and rubbish.
<br />(~;) '•.:,T~Ii: A,11 ~r;ater required ir_ the execution of this contract must be pro-
<br />vided by the Contractor at his oti^rr_ expense. ;r;~ater contain..nF; seVra~•c,, clay,
<br />0=~1 oz` 1:'iltll mu~~~t not be used.
<br />(h) BRZCI{: Brick used in the construction' o:~' catchbasins, manholes; invErts,
<br />,functions and se~,nrers shall be smooth, sound, tough, vt~i~th stra~•ht sharp ed~.es,
<br />flat surfaces and shall be uniform in quality, cross section and dimensions.
<br />If made f'rorn surface clay or fire clay they shall be burned hard entirel.~J throu;•'rL
<br />the bricLL. Tf AIo. 2 shale bric~t is used it shall be thorour•hl~,• vitrified, and
<br />sr?all show not to exceed ei€;ht percent (~35) absorption when- kiln died then
<br />i.m.nersed in water for twenty:foiu (2L~)` ;io~irs: .11 '~ricl;. _,lialJ_ '•Je ~t11orOUt:;h3.y
<br />sprinkled trr'ith water be_f_'ore laying. 1~-Ll sev~rer brick shall have a width of
<br />foi.zr inches (Ia." ), ~a len;-th of eif;ht and one-half inches (8 1./2") and a depth
<br />of two an,d .one-half inches (2 1/2") , three inches (3") or three and one-half .... _
<br />inches (3 1/2"_). Lugged brick, cored brick or brick having recesses or open-
<br />ir~~:s extendin,r through or partly throu~•h the body of the brick may not be used.
<br />(i) VITRI . ~:,:; `'.U~ l~i~, ~ PTP~: 1111 vitrified sewer pipe, slants and specials shall
<br />~be of the bell and spigot pattern salt-glazed, circular, vitrified ea.rthen-
<br />v~are mace from shale or fire clay, free from fire-checl_cs, blisters or other
<br />imperfect ~ ens .
<br />Unless othervrise. specified, all pipe, s1~,?its and specials shall conform
<br />to the requirements specified in the "Standard Specifications for Standard
<br />Stren~fth Clay Sevrer Pipe", A.S.T.i:I. ~esi~,naiion; C-13.
<br />lilhere specified, or called f'or in the plans, all pipe, slants and specials
<br />:~'~~11 conform to-the require;:~~ents specified in the "Standard Specifications
<br />?'cr i~ctra-Stren~-th Clog Sevrer Pipe", :1.S.1.i~:. l~esi€;nation: C-200.
<br />(j) LUt.•~I31JN,: Lumber for sY~eetln~,, sheet piling, •forms, bracing; or bridging;
<br />must be of ~;;ood quality and of sizes and st'ren~•th suitable for properly pro-
<br />tecting the worls and workman from d~.nger, and for. securinf~ the best possible
<br />conditions for construction. Any :naterial d.eer:~ed unstzi.table or. unsafe by the
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