Northern tribune. [volume] (Cheboygan, Mich.) 1875-1885, 1877-01-13
Notice to Contractors.

CEALED Proposals will be received by the Com.
~ missioner OF Highways for the township of Ben
ton in the county of Cheboygan, and state of
Michigan at his Office in Cheboygan village, In said
county, until o'clock p. NJ, Thursday, the 18th
day of February, \. ID. 1877, for the work and ma
terial necessary for the construction of bridge
| across the Cheboygan river, connecting 9Th street
the east with Sd street the west side river
according to plans and specifications in the office of
G. w. Bell Cheboygan, Mich, and for removing
the old bridge.
GENERAL DEscRIproN-The bridge, including the
swing to be 363 feet in length. The swing to be OF
wrought iron, provided the town authorizes shall
not deem it too expensive. otherwise of wood. and
TO be 135 feet in Lengthy to have two openings so feet
clear width. The swing to rest upon pile founda
ton and abutments and to be protected when open
fender piles and guards. The approaches to be of
wood, the east side of swing to be IS feet,
and west side $50 feet IN length. The bridge to
have roadway of l6 feet IN the clear and two side
walks feet in clear.
The work will be let whole or divided into
three contracts, the divisions being as follows:
First Division-Center Pier and Guard-The
pier to be "a feet square. supported by 100 piles.
capped with 12x12 inch Norway pine, "a feet in
length; caps to be covered with Norway timber u
inches deep and "a feet long, thoroughly spiked TO
caps The guard to be constructed with piles bind
ing timbers and sheating, to be 1SS feet extreme
length and 80 feet in width.
Second DISTINGUISHING, Turn Table and bearings
for the ends-The turn table and end bearings tor
the swing to be of proper size, strength. &c, to
support the swing and load that may upon it,,
and of approved style and pattern. The swing TO of
wrought lion. Feet In le0gtn tnaI 10 It's
lower chords, aud to have roadway 16 feet clear
width, and two foo.walks feet clear width with
handrais.
Capacity of bridge to be not less than so bs. per
square foot, exclusive of bridge weight, taken
uniform rolling load sufficient to the whole
bridge. Maximum, unit Strains fol iron under any
application of specified load, not to exceed 1900
lbs per square inch for arch chord members, and
00J lbs per sqr inch for web members of Orders.
Gordon formula being applied for all compressive
members; TO be painted with two coats of good min
eral paint.
For a wood swing same general dimensions as
above tor iron
Ii of wood, to be Howe Truss, supported BY
two iron rods on each side running over tower in
center, and have the capacity or strength as
above specified tor the iron swing, and all the tim
beers except tie floor that may be exposed to the
weather TO be dressed and, together with any iron
work so 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 SIZE OF each part of bridge, together
with strain sheets, giving weight of bridge with
maximum strains under the specified load. and the
cross section OF each principal part in square inches
so as TO give clear and proper understanding of the
merits OF the respective plans. They will also give
exact height of bridge and turn table, that is from the
top of pier that the rail for turn table rests upon
the top of roadway. calculating for II inch josts
and IL inch floor. Also give in same manner for
end of swing that it be ascertaned just what
height the aoutments and approaches must be.
Bidders for wood swing must give full specfca-
ons OF kind and size of timber in every particular
and show how spced size OF iron rods, bolts, ETC.,
used in detail.
Third Division-The abutments for end of swing
to rest upon, joists and floor for swing, the APP
proachcs and removing old bridge-The abutments
be 2S feet long and feet wide, supported by u
piles, capped with 12xl2 inch Norway pine IS feet
in length, caps to be covered with Norway pine, II
inches deep, and feet in length thoroughly bolted
to the caps.
The approaches to be supported by piles in bents
or sections, 10 feet apart center center piles
each bent or section, piles capped with 12x12 inch
Norway pine, 30 feet IN length the josts for road
way, both for swing and approaches, to be 3xl2
nehes pieces to each bent section and for foot
walks 2x10 inches ID feet in length, pieces to each
bent except the outside josts on the approaches to
be 3xl0 inches. The footwalks the approaches
to have handrals on each side throughout
The old bridge to be all taken away the full length
OF new 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 or cut off close down to
the ground.
All the work to be done and material to be fur
pished under the first and third divisions, above
shall conform to, and in every particular be i'm ac-
cordance with the plans and specifications prepared
by Geo. w. Bell, and in his office. The plans and
specifications for all the work except the swing
be examined at Geo. w. Bells office. Cheboy gan.
Mich. who will furnish any information desired
regarding the details of the work.
The work Of constructing the center pier and
abutmeEts to be completed by the 18th of May
| next and the entire work or before the LIST day
Oh June next.
Each proposal, except when made by Incorporated
bridge companies, whose reputati ON is fully estab-
lished, and parties who known be responsible,
| must be accompanied by satisfactory guarantee,
signed by two responsible parties that the parties
proposing will enter into contract and furnish the
required securities for the performance ut the con-
tract
| Payment for the work to made upon the com.
petion OF contract, and acceptance of the work by
the proper authorities. Parties offering proposals
VIII state whe they will receive, in payment for
| the work, the bonds eft the town one, two OF
three years time, if So at what rate of interest
The right to reject any and all bids not in accori'
ance with this advertisement, those deemed in
consistent with the interests of the town. is hereby
| reserved.
| Proposals cater having been sealed up) shall be
addressed, commissioner of Highways, Township
of Benton, care Geo. w. Bell, Cheboygan, Cheboy.
| gan County, Michigan" and endorsed Proposals
| tor building Bridge.n
| Dated, Cheboygan, January 10, 1877.
| T. j. CRUMLEY,
Highway Commissioner, Township of Benton.