The Owyhee nugget. ([Silver City], Idaho) 1905-1984, 1910-05-26

stream shall be twelve (l2) feet long and
down stream eight (s) feet long. Each
twelve (12) foot wing to consist of three
(3) six (6) inch I-Beam piles twenty-five
(22) to twenty-four (24) feet long and each
eight (S) foot wing to consist Of two ~
six (6) inch IBeam piles twenty two t22)
to twenty -four t24l feet long.
All main wall piles and wing wall piles
shall be reinforced by running u" rods
through the webs of each pile every fifteen
(l5) inches. After the piles are driven to
a firm bearing they shall be incased in
wall Of concrete fifteen (l5) inches thick
for the main walls and ten (I0) inches
thick on the wings. The concrete to be
composed of any standard American Port
land Cement one (1) part, to two and one
half (21Sl parts Of clean sharp sand, free
from dirt or any other earthly substance,
and three to four parts of broken rock or
gravel
The walls when completed shall show
reasonably smooth snrface and care must
be taken to fill all flaws thoroughly with
concrete. The total structure when COM
pleted shall show the material to be first
class of its kind and all labor to be per-
formed in thorough workmanlike man
ner and to the satisfaction of the Board
of County Commissioners.
1t being understood that minor changes
may be made in these specifications, and
if SO, they will be agreed upon by the
Board, and be made known to the bid
ders before bids are filed.
Notice Is Also Given, That sealed bids
will be received at the office of the Clerk
of the Board of County Commissioners of
said Owyhee County, for the construction
and erection of bridge across Succor
Creek, near Homedale, in said County,
in accordance with the following specif-
cations:
General Description: The structure
shall consist of one steel span rs feet from
center to center of end pins and is #.
clear roadway, resting on reinforced con-
crete piers. The entire structure to be de-
signed for moving load of 1900 lbs per
lineal foot of span and dead load of 40
lbs. per lineal foot of span. All materials
shall conform to sizes and dimensions
shown on the plan on file with the Clerk
of the Board
St1h. Sfrttatt1ros VHo ~, IL, l.
of steel piling and concrete as shown,
these to be placed and OF the dimensions
marked on the plan. Piling and piers to
be of the sizes and lengths shown, and
shall be set to the proper depth to bring
the bridge to proper grade. A adjust
able tie rods shall be used where shown,
and shall be drawn up before concrete is
deposited.
All concrete shall be of the proportions
of one part cement, two parts sand, and
four parts gravel or broken stone. Ce-
ment must be some well known and ap-
proved brand; sand shall be clean, sharp
and free from organic matter; and gravel
broken so as to pass through 21S" ring.
Superstructure: The structure is de-
signed to carry live load of 1900 lbs. per
lineal foot of bridge. All dimensions of |
the various members are shown on the |
drawing. All metal work must be medi- |
um steel and must have an ultimate
strength of from 10000 to 10000 pounds
per square inch, and elastic limit of not
less than one-half the ultimate strength.
No material shall be used less than d III. |
thick, except for lining or filling vacant
spaces.
Net sections shall be used in calculating
tension members.
In deducting rivet holes, they must be
aiken q inch larger than the size OF the
rivet.
In field connections, the number of
-ivets, or bolts, must exceed by twenty
i've per cent the number which would be
required for shop connections. All con-
lections must be made to develop the full
strength of the members.
All parts must be neatly finished, rivet
heads must be of uniform size and formed
with the body of the rivet.
III material must be manufactured in
accordance with the best current practice
or such materials.
All field connections to be bolted and
threads checked.
Trusses to be given proper Gambler.
Joists: If wood, there shall be ten
'ows of joists S''x41' of Douglas or Coast
ir of good quality, free from defects i'm
pairing their strength or durability They
hall be checked one-half inch over all