Northern tribune. [volume] (Cheboygan, Mich.) 1875-1885, 1877-02-03
GENTS LIST.
Notice to Contractors.

| cEALED Proposals will be received by the Com
| - missioner OF Highways for tho township OF Ben
| ion, in the county or Cheboygan, and state OF
Michigan, at his office in Che5oyga village, III said
county, until one O'CLOCK P. NJ, Thursday, the 18th
DAY of febi u,ry y. ID. 1871, Tor tie work and ma
teiiai necessary for The construction of bridge
across the Cneb ygan river, connecting 5tn street
the with 81 street Oh the west side of river
accor iIs plans aud specifications in the Office OF
q. W. Bell Cheboy gam Mich, and for removing
the Old bridge.
| GENERAL DEscRIPTioS The bridge, including the
SWING 10 be 100 ieet ia length the swing 10 be OF
wrought ron, provided the town authorizes shall
not deem il too expensive. otherwise of wood. and
be loo feet length; to have two openings ieet
clear width The swing to rest upon pie founda-
ton and abutmens and 10 b. protected when open by
fender plies and guards. The approaches 10 De OF
wood, the asst side OF swing To be as feet,
and west side $50 feet In length. The bridge to
have roadway OF 10 feet il Tie clear and two side
| walks feet In clear.
! The work viii re let as whole or divided into
three contracts, the divisions being follows:
! First Dvision-CenIer Pier and Guard-'rhe
pier to be ~ square. supported by loo piles,
capped with 12xl2 inch Norway pine, a feet in
length; caps 10 be covered with Norway timber Il
inches deep and - feet long, thoroughly spiked 10
caps. The guard To be constructed with plies, bind.
| ing iimbers and ting TO be ISIS feet extreme
| length. and 80 feet III width.
Second ID vIsion-Swlng, Turn Table and bearings
| for the enasThe turn table and e bearings tor
the Swing TO be OF proper size, strength &c, to
support the swing anu load thai may come upon ii,
OF approved style and pattern. The swing 10 OF
wrought roD Loo feet III length, that is 10 Say lis
lower chords, aIid to nave roadway 10 feet clear
width, ana two foo.walks4 feet clear width with
halIdras.
Capacity of bridge TO be not less than &C lbs per
square loot exclusive OF bridge weight, taken ID a
UNIFORM rolling load sufficient 10 cover the whole
bridge. Maximum unit Strains tol iron under any
application vi specified load, not TO exceed 400
lbs. per square iol ch chord members and
IL 0Uv lbs per sqr. inch for web members O girers.
Gordon formula being applied for all compressve
members; TO bc painted with two coats oi good min
eral paint.
For wood SWING general dimensions as
above tor iron
Ii of wood, to be Howe Truss, supported by
two iron rods Oh eacn side running over tower III
center, and TO nave the same capacity or stren2
above specified tor the iron Swing, and all tim
bers except Il 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 tnis division mast furnish full plans and
detail specifications. giving form and dimensions OF
Sirders ana we OF eacl part OF brd9e, together
with strain sheets, giving weight OF bridge with
maximum strains under the specified load, and the
section OF each principal Part III square inches,
10 give clear and proper understanding OF the
merits ot the respective plans. They will also give
height OF bridge and turn table, that is from the
top OF pier that the rail for turn table rests upon to
t,le top OF roadway. calculating Tor II inch jOsts
and 2 IL inch floor. Also give in same manner for
end of swing that it De ascertaned just what
height the aoutments and approaches must be
tions kind and size of timber in every Particular
AID show now spiced, size OF iron rods bolts, etc.
used in detail.
Third Divis,on-'The abutments for end OF swing
TO rest upon, jOists and floor Tor swing, the APP
proachcs and removing old brdge-The abutments
TO be % feet long and feet wlde supported by Il
plies, capped with l2xl2 inch Norway pine - feet
in length caps 10 be covered with Norway pine, II
inches deep, and feet in length, thoroughly boied
to the caps.
The approaches TO be supported by piles in benis
fs.nt tn e..nfn nil
each bent or section, piles capped with 12xl2 in n
Norway pine 80 ieet length; the Jolsts Tor road
WAY. both for Swing and approaches, to be 3xl2
inches pieces to each bent sectio ana for foot
walks 2xlO inches Id feet in length, pieces 10 each
bent except the outside oiss on the approaches TO
be 5Xl0 inches. The foOtwaks on the approaches
To have handrstls on each side throughout
he 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 ard where the abutments for
ends of swing shall be placed; balance of old piles
may be either drawn out cut Oft 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 ac-
cordance with the plans and specifications prepared
by Geo. W. Bell, aid in his office. The plans and
specifications Tor 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
abutnie II to be completed by the 18th of May
next ami the entire work on or before the LIST day
OF June ,cXt.
E,c.i proposal, except when made by Incorporated
bridge companies, whose reputation is fully estab-
liShed, ad parties who are known TO be Responsible
must 10 accompanied by satisfactory guar ante e.
lned 0y two les onsible parties, that the parties
plopo>ihI 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
pletion OF contract, and acceptance of the work by
the proper authorities. Parties offering proposals
will whe her they will receive, in pay ment for
the work, the bonds ct the town on one, two or
three years. time, ii 20, at what rate of inter St
The right to reject any anu all bids not in accord.
auce with this advertisements, or those deemed in
with the interests OF the town, is hereby
reserved.
Ptopos ls 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:
II j. CRUMLEY,
Highway Commissioner. Township of Benton.