Northern tribune. [volume] (Cheboygan, Mich.) 1875-1885, 1877-01-27
Notice to Contractors.

cEALED Proposals will be received by the Com
~ missioneroi Hishways for tho township OF Ben
ton, in the county OF Cheboygan. and state of
Michigan, ut his Office In Cneboygan village. IN said
county, until O'clock P. NJ, Thursday, the 10th
day OF February a. ID. 1877, tor tie work and
terial necessary Tor the construction OF "a bridge
across the Cneboygan river, connecting 9th street
on the east with sd street the west side of river
according to plans aud specifications III the Office OF
g. w. Bel, Cheboysan, Mich, and for removing
the Old bridge.
GENERAL DEscRIPTioN-Thc bridge, including the
swing, to be 36S feet ia 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 length; 10 have two openings 90 feet
clear width. The swing TO rest upon pile foullda-
ton and abutmens aud 10 be protected when open by
fender piles and guards. The approaches to be of
wood, the one cast side OF swing to be IS feet,
and on west side ljO feet III length. The bridge to
have Roadway OF 10 feet il the clear and two side
walks 4 feet in clear.
The work will ne let whole or divided into
three contracts, the divisions being as follows:
First Dvision-Center Pier and Guard-The
pier To be "a feet square. supported by 100 piles.
capped with 12xl2 inch Norway pine, a feet in
length; caps to be covered with Norway timber II
inches deep and "a feet long, thoroughly spiked
caps. The guard to be constructed with plies, bind
ing timbcrs and sheating, TO be 1SS feet extreme
length, and 80 feet III width.
Second DISTINGUISHING Turn Table and bearings
for the endsThe turn table and cad bearings Tor
the swing to be of proper size, strength. &c, TO
support the swing aud load that may come upon it,
and OF approved style and pattern. The swing to OF
wrought rcD 135 feet in length that is 10 say its
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 bs. per
square foot exclusive OF bridge weight, taken
UNIFORM rolling load sufficient to cover the whole
bridge. Maximum unit Strains toi iron under any
application OF specified load, not to exceed AGO
lbs per square luch fol arch chord members, and
1l0OJ los per sqr. inch for web members of girdefs
Gordon formula being applied for all compressive
members to De painted with two coats OF good min
eral paint.
For wood swing same general dimensions as
above tor iron
Ii of wood, to be a Howe Truss supported by
two iron rods on eacitside running over tower in
center, and To have the capacity strenst tn
above specified Tor the iron swing and all the Tim
bers except u foer that may be exposed To the
weather 10 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
grders and SIZE of eaea part of bridge, together
with strain sheets, giving weight OF bridge with
maximum strains under tile specified load, and the
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 table upon to
the top OF roadway calculating for IL inch josts
and II inch floor. Also give in same manner for
end OF swing, that it be ascertained just what
height the aOutments and approaches must he. |
Bidders 70 wood swing must give full specfca- |
lions OF kind and of timber in every particular,
ard show how spiiceti size of iron rods bolts, ETC.
used in detail.
Third Divison-The abutments for end OF swing |
TO rest upon, joists and floor for swing, the APP |
pr0achcs and removing old bridge-The abutments |
10 be % feet long and feet wide, supported by 81
piles, capped with l2Xi2 inch Norway pine. IS feet
in length caps 10 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 to center piles to
each bent or section, piles capped with l2xl2 in;h |
Norway pine, 80 e, In length: the joiss for road
way. both Tor swing and approaches, 10 be SKI
inches pieces to each bent section, ana for foot
walks 2xlO inches Ii feet in length, pieces TO each
bent. except the outside losts the approaches 10
be 3xl0 inches. The footwalks the approaches
TO have handralls on each side throughout
he old bridge to De ali taken away the full length
or new bridge; All the Old piles 10 be drawn ont the
full distance OF swing ard where the abutmeHts for
ends of swing shall be placed; balance Of old piles
may be either drawn OUT or cut oil Close down 10
the ground.
All the work to be done and material to be fur
rished under the first and third divisions above,
shall conform to- and in every particular be in ac-
cordance with the plans and specifications prepared
by Geo ". Bell and in his office. Tie pa,is and
specifications for All the work except the swing
be examined at 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
abutmei Is to be completed by the 18th of May
next, and tbe entire work or before &c LIST day
Of June next
Each PROPOSAL except when made by ircoj porated
bridge companies, whose reputation is fully estab-
Shed, and parties who known 10 be respoIIs Ole,
must he accompanied by q satisfactory guarantee,
signed by two Responsible parties that the parties
proposing VIII enter INTO contract and furnish the
required sscul les for tl,c performance ot the
tract
Payment for the work to made upon the com
peiion OF contract, and acceptance of the wori, by
The proper authorities. Parties offering proposals
will stake wiei her they viii receive in ay T.ent for
The WORK, tie hoIits eI tie town one, two or
three years time if 10, at hat rate OF inter 81.
TGe right to reject any ana all bids not in accord.
lnct with this advertisement those deemed IN
consistent with the interests OF the town, is hereby
reserved.
PTopos Is CATER having been sealed up shall be
addressed, commissioner OF highways, Township
ii Benton, care Geo. W. Bell, Cheboygan, Cheboy
gan County, Michigan" and endoI Used, Proposals
or building Bridge.n
Dated, Cheboy IAN, January 10, 1877.
T j. CRUMLEY,