The Cairo bulletin. [volume] (Cairo, Ill.) 1872-1878, 1878-01-31
notice TO CONGRACTORS.
OrsICE OF CITY CLERK,
G.ipo lila Tao - Ip-l

Sealed proposals. v i'll be received Ut this
{ ttice, directed 10 the city council Of Cairo,
Illinois, until O'clock Tuesday evening,
February 9th. A. D. 1878, tor the construc.
ton OF a me span iron bridge, together
With The approaches or HbutIE,e nts AMI
foundation, across Cache river, about one
and one. SIT miles from Mound City rail-
road uep1I, aad four miles north OF the city
OF Cairo, In the counties Of Alexander and
Pulaski, state OF illinois, according 10 The
plsps IND specifications prepar, d ny J I'm
2. Heiy, ESQ, q. H., now on 1le and sub
jsct to examination IN this ntflce, the rpeci.
tiGt,ions OF which are a f)lows, viz:
Said bridge and trestIe work hs msde
up Of eigb EN- iSI op nings OF eight en- s.
feet from contre 10 centre OF Pc ~, and one
span OF one hun ired llV0) teeI a.ross the
river bed.
The one hundred ZOO fee. span t, be OF
ron, aud al Proporti0ued thsts load OF ten
| (lO) tons dist ihuted over twenty t!0) lineul
| test vt the centre o. shc span,. shall not
| strain the hon over twelve thousand
| ~ N0) P0unos per square inch tensile, or
over seven thousand tiYe hundred II t0)
pounds per square inuh ,hearing strain
| the strain In comp,es Ion ~ be- IN AZ,
lea In the proportion - the ratio OF
! length to diameter, ny uordon's formula.
Tue span OF said bridge to be Uns hpn-
ed (lu0} iert In the clear and the roadway
twelve (2l feet wide.
The floor to be 81 white oak plank two
and o.e.halt t2a) inches thick ana not over
twelve ls2} inches wide.
The door beams TO be Of white oak and IN
proportion to the bslanc, Of the one hun.
| die- Il o. test sgan structure, and also 10
| be provided with y suitable axle qua d.
The ab ye TO rest upon iron column, pro.
| p rti0ned 10 the structure TO be Supported,
tie columns at each end o. the bent or iron
span to De placed on mud bill ,zXl2, TWEEN.
| " l20l feet long inorticed and tehoner t y
| sufficient number uf waite OAK Plies, lrn.
| ly driven into the river hank.
| 1REsTLB weRH.
The bents to b. formed VI tour posts l0X 1"
inches square, the lwo inner parts TO stand
perpe ndicular and thu Two outer parte 10
| 10 framed and stand A. batter Of ono In
| eight The cap aud sill OF the bents to be
i1H 20 th~ ~auare GIN ier, Q CAPS to he
twenty Y y feet long, and the stills 10 pro-
jsct on each end two ieet past tho outer
eage of tue on side 20 Is. The posts to be
mo iiced d I'd tenoned INTO the caps and sills,
| and each tenon TO be pinned With two
tbree.fuarter (sl inch sQu.re iron pirs, and
| each bent I, be braced y two diagonal
l uldCpr w iS~ASl iVCl plnuA, Ncu NV AL y
| spiaed On caps, posts and sills.
The bents to rert or staud u ON four mud
! sills l2AI2 inches and eight ~ feet 10 X set
10 the ground and placed on the alignment
! Of the work.
The carriage way O.! the ..trestls work 10
be sixteen as feet wide, the floor plank
o be thee t3l inches and not over twelve
| ~ inches wide, and ~ be well spiked on
| 10 the siriDgers aud floor beams.
rae door beams to be N dc up as follows
two ~ stringers OF sXl2 inches 1T on the
caps aud sixteen ll6) ieot apart from out
side 10 outside. The space between said
s,ringers to be equ>lly diyiaed for seven
| ~ beams Of 3Xl3 inches each aud each set
| OF tOor beams or spans to have tHrec E;) sets
OF her. ingbons bridging OF 2X4 inch Scsnt.
ling.
The stringers and 6oor beams to res. at
leas,six (6l inches on Tho caps.
| The s.IipgSrs TO connect by half JOINTS
| and 10 be fsstened TO the caps by one inch
round spikes or bolts eighteen tls) inches
long.
A railing or bsllssters four (4) fee. high
| ~ be constructed on each side Of above dis.
eribed trestlewOrk. The posts TO DO Axe
inch c!oeH and braced on the CAPS and fasten.
Cd on to the st fingers by two az enc. half
inch bpits. The parts to be NIX (8) feet
apr; the hand rail aka inches, aud an
axle guard Of 2X's inchel, Oh well taste nsd
| on to the posts.
All Of the above tinbers to be OF white
OF burr oak of bes. qua Atty, and
the work doEo In q thorough AMI work
man!ike m liner, and under the superv islon
of such prrsop AZ the committee on sire eta,
or the city council Of the city Of Cairo may
| designate.
| The approaches 10 above trestlewosh and
| bridge TO DO OF earth aud with q sopt Of
not more than one In ten and not les than
sixteen 10y feet wide on TOP, With q slope
TO the b .se Of one In two. Sepsr ,ts bids
will be received for iron spac, including
abM,nients an foundation, for The wooden
treate portion OF said bridge, and for the
esrthcn approached, or fT the entire
work.
":a4 y1gh, to reject any or al bids, 10 re-.
served. J b. PRtLLls,
| dtd CT y Gle I