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<br /> If any spongy 'vegetable, nor -other objectionable matter be found in the .road bed
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<br />E below subgrade, such material shall b-e removed and the space filled with stone
<br />~, fragments, sand, ~ gravel, ~ or earth' and. shall be. carefully -rammed or rolled in
<br />- ~-order to make ?such filling' compact, solid .and true to surface of subgrade, ;
<br /> The subgrade shall~be~brought to the required crown by the use of: suitable tools
<br /> and checked with the template furnished.by.oimer. The. template used in checking
<br /> cross section of.. the subgrade shall conform to the specified cross ,section of
<br />TEb+IPLATE shall be ~of 'design and construction satisfactory to the Village ,
<br />the roadway,
<br />' ,
<br />Engineer ~ and must be operated by guides . to. insure uniformity of elevations . The ~. ,
<br /> area'in.inter.sections shall be graded by staking into sections not less than 10
<br /> feet square acid conforming,to' subgrade to such governing points. -
<br /> BITUI~ZINOUS T~ACADAi~. PAVEMENT:- (a) FOUPIDATION: The macadam foundation shall be "
<br /> constructed five inches (5). in thickness of air cooled slag having a true specific
<br />- STONE _
<br />less. than~2.60 andpornsi`tynot to exceed 20%.by volume. A cubic
<br />gravity of not
<br />'
<br />- ~ , ,
<br />.
<br />foot 'of graded' slag, consolidated ,by -shaking, must weigh not less than. 70 pounds
<br /> material shall be prepared by being passed through a~suitable stone ;
<br />- ~The~
<br /> .
<br />crustier•and.broken•approximately cubical, of. such size as will pass through a ,
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<br />SLAG pass a screen, with one inch •
<br />screen with four -inch ~ (~k~~) square holes, .and not_
<br />~' ~ (1~~) square holes and shall be entirely- free from shale, dust, or dirt,. . P:~aterial ..
<br />- classified as.,N~o. 1 'and 2.'szes,., ~ ~ -
<br /> ^l~h.e material as abovespecified 'shall_;be spread evenly over the surface ~, ,
<br /> of tYie~~~rolled subgrade in "one ('1) course and thoroughly rolled.,working i.rz parallel
<br />~`~~~~ - ~ lines from curb to crown, After this course has' been completed by rolling to
<br /> the satisfaction- of ~ the. Engineer, all' voids shall be filled with screenings ~ '
<br />- ~ - classi.fied~ as `No, 7, passing l/2~~ screen which shall be worked into foundation ,
<br />BASE ~ by at least 'two (2) applications; each ,layer of .coarse screenings to.be vworked,
<br /> ion by thoroughly rolling dry, then~sprinkling.before the next course
<br />founda.t
<br />into
<br />_ _
<br />.
<br />is~applied. ,subgrade shall if .necessary be protected by planking to support '
<br />-
<br /> ~
<br />.trucks: No material sha1T be dumped except on 2~~ planking and all spread later
<br />~
<br />. ~ , may be used if
<br />,'by shoveling into• place •in the base work. Mechanical• . spreaders
<br /> ,
<br />of type .giving uniform depth.to courses;~ if subgrade is dry and hard.the spreader
<br />,- ~ ~ in action may operate upon the rolled,.earth bed,-planking being removed for such
<br />- . ° .distance for- each, load..: - - ~ . , ' - ~ _ -
<br />' The ,macadam foundation 'stall after'having been thoroughly, rolled, filled ~ .
<br />DEPTH and surfaced' as. specified; -have a thickness or. depth of at .least five inches (5~~)
<br /> with~its top .surface as specified to elevation given,, which shall be three inches
<br /> . (3~~) belovr. finished .grade.
<br /> compression,shall be ob~aned'by use of two drive macadam type roller, -
<br />- less than 10 tons-with working :load, The roller shall be operated
<br />weighing not
<br />ROT~LER- ,
<br />longitudinally along curb lines, working then towards center. Cross rolling
<br /> shall then~be~ done. to secure uniformity, in surface,. •Care must 'oe exercised to
<br /> . avoid excessive crown rolling .that .will 'deform cross .section; the edges must~be
<br />• - firmly bound at first operation, ~ ~. ~ ~ - ~ - .•
<br />J~. ~~ Slag ,for' the surface shall be prepared by being::passed through
<br />(b ).: SURFACE:-
<br />`~
<br />`~~?`4
<br />: -
<br />-a suitable. "stone crusher and broken -to approximately _,ctibi cal form of such size .
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<br />.:
<br />{. ~.. ~`- -
<br />as will pass through a screen with three inch. (3~~-) square holes and not pass -
<br /> a •screen with ,cjne inch ' (l~~) square holes classified as 1Vo. 2 size. Coarse
<br />'
<br />.
<br />SURFACE ,
<br />SCReeriings shall range in size from one inch (1~.~) to~ one-fourth inch (1~4~~) in
<br />..
<br />SIZFS` - ~ largest dimensions: conforming to No•.' 4 State;Specification, and shall be of
<br />' quality of slag above specified. The broken slag for- lower course of surface ;
<br /> shall be delivered upon•the prepared foundation and shall be applied with a
<br />- -- .::
<br />suitable mechanicah spreader giving un~.form~~distrbutiori: ~` 'Axly 'irregularity--in
<br /> surface shall be corrected•by raking or forking and excess of small stone that
<br />' ~ ~ closes voids must be removed and replaced with suitable slag. The slag for
<br />• ~ -' lower course, .of size. and quality specified, ,shall be spread to._3-~ depth over
<br /> the.foundation'or~to such a depth'as will,'when thoroughly roiled, bring its -
<br />-- - surface to .thefinished grade and crown... _
<br /> ". 20-b -,
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