Northern tribune. [volume] (Cheboygan, Mich.) 1875-1885, 1877-01-20
Notice to Contractors.

cEALED Proposals will be received by the Com
~ missioner of Highways for the township of BEN
Michigan, at his Office in Gheboysan village, said
county, until one O'Clock PM, Thursday, the 18th
terial necessary for the construction of bridge
across the Cheboygan river, connecting 5ti street
the with Sd street on the west side of river.
according to plans aud specifications in the office of
q. w. Bell, Gheboygan, Mich and for removing
the OIL bridge. 1@@ -
| GESkRAL' DEscRIrrrox- bridge including the
swing, 10 be 1858 feet in length. The swing to be OF
wrought iron, provided tile town authorities shall
not deem it too expensive. otherwise of wood. and
TO be 135 feet in Iengh to have two openings 90 feet
clear width. The swing to rest upon pile founda
ton and abutments and to be protected when open by
| fender ples and guards. The approaches to be of
wood, the on cast side of swing to be IS feet
and on west side l50 feet IN length. The bridge to
have roadway of 10 feet in the clear aud two side
walks feet in clear.
The work will he let as whole or divided into
three contracts, the divisions being follows: ~.
First Divsion-Center Pier and Guard-The
pier to be n feet square supported by 100 plies,
capped with 12x12 inch Norway pine, "A feet in
length; caps to be covered with Norway timber II
inches deep and "A feet long, thoroughly spiked 10
caps The guard to be constructed with piles bind
ing timbers and shcating, to be ISIS feet extreme
length, and so feet in width
Second Diyision-Swing, Turn Table and bearings
for the ends-The turn table and e: Il bearings ior
the swing ODE of proper size, strength. &c, to
support te swing and load that may come upon il,
and of approved style and pattern. The swing 10 or
wrought iron. 135 feet i'm length, that ist say it's
lower chords, and to have roadway 10 feet clear
width and two foo:walks feet clear width with
handrails
Capacity OF bridge to be not less than so los. per
square foot, exclusive of bridge weight, taken
uniform rolling load sufficient to cover the whole
bridge. Maximum unit stains foi iron under any
application of specified load, not TO exceed 14,OGO
lbs. per square inch for arch chord members, and
1000 lbs per sur inch for web members OF grders.
Gordon fornlul:sbcing applied for all lcompressivc
members; TO be painted witt, two coats OF GOOD min
eral paint. ai
For wood swing general dimensions as
above tor iron
Ii of wood, to be Howe Truss, supported BY
two iron rods each side running Il tower in
center, and TO have the same capacity strength
above.s pecfed for thei iron swihg, and all the tim
beers cxceptti floor that may be exposed to the
weatlkrto be dressed and, .togethcrwith any iron
work exposed, to be painted with two coats of
good mineral paint
Parties sending in proposals for the work to be
done under this division must furnish full plans and
detail specifications. giving form and dimensions of
girders and re of eacn part of bridge, together
with STRAIN sheets, giving weight of bridge with
maximum strains under the specified load and the
section OF each principal part in square inches
to give clear and proper understanding of the
merits of the respective plans They will also give
height of bridge and turn table, that is from the
top of pier that the rail for be rests upon, to
the top of roadway calculating for II inch jOsts
and 1-2 inch floor. Also give i'm same manner for
end of swing, that it can be ascertancd just what
height the aoutmcnts and approaches must he.
Bidders for wood swing must give full soecfc:,-
lions kind and size OF timber in every particular,
AID show how spiced, size OF iron rods, bolts, etc,
used in detail. s btt[ trt
Third Division-The abutments for end of SWING
to rest upon. josts and floor for swing, the APP
proachcs and removing old bridge-Thc ahutments
TO be % feet long and feet wide, supported by n
piles. capped with l2xl2 inch Norway pine. IS feet
in length cups to be covered with Norway ping, II
inches deep and feet in length, thoroughly bolted
to the caps. 4.4i
The approaches to be supported by piles in bents
sections 10 feet apart center To center piles to
each bent or section, piles capped with 12Xl2 inch
Norway pine 30 feet in length the josts for road
way. both for swing and approaches, to be SKIP
inches PIECES 10 each bent or section, ana for foot
walks 2x1O inches 10 feet in length, pieces to each
bent, except the outside josts the approaches to
be 3Xl0 inches. The foOtwalks on the approaches
to have handraIs each side throughout H|
The old bridge to be all taken away the full length
of bridge; all the Old piles 10 be drawn out the
full distance of swing and where the abutments for
ends of swing shall be placed balance of old piles
may be either drawn out cut Off close down to
the grOund. II r. ~ 90
All the work to be done and material to be fur
rished under the first and third divisions, above,
shall conform to, and i'm every particular be i'm ac.
cordancc with the plans and specifications prepared
by Geo. w. Bell, and in his office. The plans and
be examined Mt Geo. w. Bells Office. Chebovgan
Mich who will furnish any information desired
regarding the details of the work.
The work of constructing the center pier and
abutments TO be completed by the 18th of May
next aud the entire work or before tle LIST day
of June next p e ~ q " II
E3cn pfOpOsai, except when maze BY Incorporated
bridge companies, whose reputation is fully estab
lished and parties who known TO be Responsible
must be accompanied by satisfactory guaIantee
signed by responsible parties, that the parties
proposing will enter INTO contract and furnish the
required securities for the performance IF the con-
tract.
Payment for the work to made upon the COM
pleon of contract, and acceptance of the WORK by
the proper authorities Parties offering proposals
will state whether they will receive, in pay ment for
the work, tie bonds ef the town one, two or
three years. time, if 40, at what rate of interest
The right to reject any ana all bids not i'm accords
with this advertisements, or those deemed in
consistent with the interests of the town. is hereby
reserved s-
Z Proposals latter having been sealed up) shall be
addressed, "Conmissioner of Highways, Township
of Benton, care Geo. w. Bell Cheboyg gan, Cheboy-
gan County, Michigan" and endorsed, Proposals
tor building Bridge"
Dated, Cheboygan, January 10, 1871
Il j. CRUMLEY,