Northern tribune. [volume] (Cheboygan, Mich.) 1875-1885, 1877-02-10
Notice to Contractors.

Proposals VIII De received by the Com
~ missioner OF Highways for the township of Ben
| ton, i'll the county OF ChebOygan, and state OF
Michigan at his office In Cheboygan village, IN said
county, until one O'Clock P. NJ, Thursday, the 18th
day OF February. A. d. 1877, tor the work aud ma
| teral necessary for the construction OF bridge
across the Cheboygan river, connecting 5tn street
Oh the east with I'D street on the side Of river.
according to plans aud specifications in the Office of
the old bridge.
GENERAL DEscRIProN-Thc bridge including the
swing, De 363 feet in length. The swing to be OF
wrought iron provided the town author. ties shall
not deem IT too expensive. otherwise OF wood. and
To be l35 feet in length TO have openings feet
clear width. The swing to rest upon pile foi,nda-
ton and abutments aud 10 b.. protected open Gy
fender piles and guards. The approaches 10 b. of
wood, the one EAST side OF swing To be IS feet
and west side $50 feet III length. The bridge to
have Roadway OF 10 feet in the clear and two side
walks feet in clear.
The work will &c let as whole or divided into
three contracts, the divisions being follows:
First Division-Center Pier and Guard-The
pier to be n feet square. supported BY 100 piles
capped with 12xl2 inch Norway plnc q feet la
length; caps To bee covered with Norway timoer II
inches deep and - feet long, thoroughly spiked To
caps. The guard 10 be constructed with piles, bind
ing timbers and sheating to be 1SS feet extreme
length. and 80 feet in width.
Second Dvision-Swlng, Turn Table and bearings
for the ends The turn table and e. bearings Tor
the swing to be OF proper size, strength. &c, to
support the swing and load that may come upon it,
ani of approved style and pattern The swing to OF
lower chords, AMI to have roadway l6 feet clear
width, and two foo:waks 4 feet clear width with
handrails.
Capacity of bridge to be not less than so lbs per
square foot, exclusive OF bridge weight, taken AS "A
uniform rolling load sufficient to cover the whole
bridge. Maximum unit Strains fol iron under any
application of specified load, not to exceed 14OUO
lbs per square Inch fol- arch chord members, and
IL 900 lbs per sqr inch for web members OF grders
Gordous formula being applied for all compressive
members; to be painted with two coats OF good min
eral paint.
For wood SWING same general dimensions as
above tor iron
If OF wood, to be Howe Truss, supported by
two iron rods OH each side running "a tower in
center and to have the capacity strength rs
above specified tor the iron swing, and all the tim
bers except Il e floor that may be exposed to the
weather TO be dressed and, together with 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
grders and SIZE of each 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 for table rests upon to
the top OF roadway. calculating for II inch joists
and L. 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 TO. wood swing must give full speclfica
iionr OF kind and size OF timber in every particular
ard show how spiced, size of iron rods bolts, etc,
used in detail
Third Dlvlsion-'rhe abutments for end OF swing
to rest upon, joists and floor for swing, the APP
proachcs and removing old bridge-The abutments
TO be % feet long and feet wide, supported by Il
piles, capped with l2xl2 inch Norway pine IS feet
in length caps to be covered with Norway pine, II
inches deep, and feet in length, thoroughly bUted
to the caps.
The approaches to he supported by piles in bents
sections, Is feet apart center To CENTER plies to
each bent or section, piles capped with 12xl2 in;h
Norway pine 80 feet In length; the oists for road.
way. both for swing and approaches, to be 3x12
inches pieces to each bent section and for foot
walks 2xlO inches 10 feet in length, pieces 10 each
bent except the outside Joiss the approaches 10
be 3x10 inches. The fOotwalAs on the approaches
to have handr;rs on each side throughout.
The old bridge to be all taken away the full length
of bridge; all the old piles TO be drawn out the
ends of swing shall be placed; balance of old piles
may be either drawn out or cut OH 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 in &C.
cordance with the plans and specifications prepared
by Geo. W. Bel, aud in his office. The plans and
specifications for ali the work except the swing can
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
abutments To be completed by the 18th of May
next and the entire work on or before the LIST day
of june next.
Eacii proposal, except when made by Incorporated
bridge unpanes, whose reputation is fully estab
lished. I'd parties who are known 10 be responsible,
must 10 accompanied by satisfactory guarantee,
signed ~ ionsible parties, that the parties
Will enter INTO contract and furnish the
reqii.t secun les Tor the performs uf the con.
tract.
Pa, incnt for the work to made upon the COM
plelio contract, and acceptance of the work by
the proper authorities. Parties offering proposals.
will state whe' her they wreceive in pay ment for
the work the bonds ef the town on one, two or
three years time, it 40, what rate of inter ST.
The right to reject any all bids not i'm accord
ance with this advertisement or those deemed in
with the interests of the town, is hereby
reserved.
Proposals cater having been sealed up) shall be
commissioner of Highways, Township |
of Benton, care Geo w. Bell, Cbeboygan, Cheboy-
gan County, Michigan" and embossed, "Proposals
tor building Bridge"
Dated, Cheboygan, January 10, 1877:
T j. CRUMLEY,
Highway Commissioner. Township of Benton.