Montgomery County sentinel. [volume] (Rockville, Md.) 1855-1974, 1860-10-12
Proposals for Building Bridge.
OFFICE OF THE COMMISSIONERS
Fox MONTGOMERY COUNTY.

OFFICE OF THE COMMISSIONERS
For MONTGOMERY COUNTY,
September, 18th, 1860.
CEALED PROPOSALS will be received at
- this Office, until TUESDA Y, The 18Th dun
of October merit, for building a Bridge over Sene-
ca, at or near Choppers Mill, agreeably to the
specification marked No. l, or the specifica-
ton marked No. 2. Bids will be received for
either specification bidders will state which |
plan they propose for Z;
Specification No. 1.
Two abutments, ls feet long each at the bot |
tom, battenng to l6 feet at top; feet thick |
at bottom, battening to 3feet at the top s feet |
high above low water mark to rest on a solid
foundation Of large solid stone, sunk sufficient
ly in the ground TO prevent frost or water un-
dermining the same; 2 wing-walls, 2 feet
thick at bottom, battening to l6 inches at top;
l8 feet in length, and averaging feet in height;
the abutments and wing-walls to be built of
good solid stone, with strong lime and sand
mortar stone work to be well pointed in with
the same material; bridge to be &c feet between
the abutments, and to be Ia feet wide, or IL
feet in the clear; to be built with one SILL or
each abutment IA feet long, 2 by l8 inches
square; to be confined by bars Of iron worked
up through each abutment Zone bar on each
~
inches square; 4 Of the joists to be confined TO
the stills by means Of iron bolts II inches So
with screws and taps the ends Of the joists
between the ebutments to rest on the cap stills,
PA feet long, l6inches square; to be supported
on queen posts, IL by l6 inches square; to
rest on mud sill, &c feet long, l6 inches SO. ;
to be sunk in the earth sufficiently deep to pre-
vent frost or water undermining it braces,
from the outer ends Of the mud sills to the
queen posts, at proper elevation, and to be
secured to the same by tenant and mortice d
king posts, feet long and 10 inches square
| 2supporting beams, l feet long and in. So,
to be confined to king posts by A good iron
stirrups, with bolts and screws; braces of
sufficient length TO connect and support the
king posts TO the joists from the ends of the
cap stills posts. 5 feet long, by 10 inches
one to be confined at each corner Of the bridge
for the hand railing to rest on, the hand rail
ling to run the entire length of the bridge, and
to be inches square; the flooring to be moi
less than two inches Thick 10 be well spiked
to the joists; all the timbers to be of good
white oak.
Specification No. 2.
Two abutments, l6 feet long each of stone
laid In lime mortar, not exceeding four feet il
height, "a feet broad at top, and feet at bot
tom, with sill on each l6 feet long, 10 by l:
inches square; the bridge to be Sc feet long
from abutment to abutment, and to be IA fee
wide, or IL feet in the clear to be supported
between the abutmeuts by wooden piers
the centre pier to rest on mud sill, % fee
long; to-be hewed on two sides, with fac,
not less than IL inches broad and IA inche
thick, and to be sunk under the bed of tn,
creek a sufficient depth to prevent frost ant
water from undermining it, not less than
feet well secured by means of stone wei
rammed in; queen posts to be tcnanted ant
mortified in this SILL IA feet long, IL by !.
inches square braces from the ends of tn
mud sill TO the queen posts, at a proper eleva
ton, and secured to them by tenant and NOR
tice; other brace extending from the lowe
queen post, and well secured at the foot O
I that post, and likewise to the mud sill, at tina
point and to extend from that queen post t,
the upper queen post, at proper elevation
to insure strength those three braces to b.
/, u feet long, II inches square; the cap sill t.
be IA feet long, and l6 by IA inches square
the other two piers to be of the following di
mansions and plan; the mud sill of each t,
be "a feet long, to be hewed on two sides
witha face of not less than IL inches, l.
inches thick, and to besunk in the solid eartl
sufficient depth to insure its safety, an(
from being undermined by frost or water;
queen posts to be tenanted and morticcd into
each sill, and to be IL inches square, and L:
feet long, with one brace on each side, from
the ends Of the mud sill to the queen posts. at q
proper elevation, and secured to them by ten.
ant and mortice those braces to be 10 inches
square; the cap sill connecting the queen
posts, IA feet long, ~ by IA inches square
braces to each Of the end piers, 10 inches
square, to be connected 10 the queen posts by
tenants and mortices, and not more than is
inches below the cap sills and to extend from
thence into the earth near the stone abutments,
about IL Feet long; 10 king posts feet long,
by 10 inches square; l6 josts, IS feet long.
by IL inches square; four of the joists to be
confined to the cap stills, by means of iron
bolts, II inches square, with screws and taps
supporting beams, Il feet long, 10 inches
square, 70 be secured to the king posts in the
centre of each span by a good iron stirrups
with bolts and screws; 8 braces, Of sufficient
length to connect and support the king posts at
the centre of each span, and extend to the
joists, near the cap sill posts, feet long, s
inches square, one TO be confined at each cor
ner Of the bridge for the hand railing to rest
on, the hand railing to run the entire length
OF the bridge, and to be inches square the
flooring not to be less than inches thick to
be well spiked down to the joists all the tim
bers to be Of good white oak.
In addition to the above, there will be re-
quired l6 joists, ID feet long, 8 by II inches
square, for the purpose Of connecting the two
outer piers with the stone Notwithstanding
the entire length of the bridge SO feet. And
it is further to be understood, that there is an
abundance Of stone on the spot that can be
used without charge from the proprietor.
One ofthe outer piers will rest or be sunk in
to the solid breast of the old mill dam, and one
Of the stone abutments on the top of the same
breast of the old mill dam, the breast of this
old mill dam, TO have a dry wall Of stone
placed around it to prevent its being injured
| by freshets the other outer pier to be sunk
into the solid earth, Tor stone now there) few
feet from the bed of the creek the stone abut-
ment on the east bank to be erected ON the Ton
Of the solid earth, nearly on level with the
public road
The contractor will be required to give bond
with security, for the faithful performance of
the work. The Bridge to be completed within
90 days from the the 10th of October. ls60.-
Upon the completion Of the work, inspection
of the Commissioners and their approval the
money will be levied at the time Of making
the annual levy for the year of 1861,
uRlAIl FORREST, Clerk
sep zl--tu to Commissioners.