DOI Page / Citation link:
https://doi.org/10.11588/diglit.1651#0011
THIRD BOO K.
*i
C H A P. VII.
Os the BRIDGE ffls GlS MO N E;
THE Qsmotu is a river, which salling from the mountains that divide Italy srom
6ermdnyt runs into the Bre/ita, a little above BaJJ'ano. And bccaulc it is very rapid, and
that by it the mountaineers send great quantities os timber down, a rciolutiun was taken
to make a bridge there, without fixing any polls in the water, as the beams that were
fixed there were (haken and earned away by the violence of the current, and by the
(hock os the ttones and trees that by it are continually carried down : wherefore Count
Giacomo Angarako, who owns the bridge, was under the nccettity of renewing it
every year.
Tin invention of this bridge is, in my opinion, very worthy of attention, as it may Plate 3.
serve upon all occtsiops, in which the laid disficulties {hall occur; and because that bridges
thus made, are ttrong, beautiful, and commodious: strong, because all their parts mutually
support each other ; beautisul, because the texture of the timbers is very agreeable and com-
modious, being even and in the same line with the remaining part os the itrcet. The
river where this bridge was ordered, is one hundred foot wide ; the breadth is divided into
six equal parte ; and at the end of each part ('excepting at the banks, which arc llrcngthned
with pilasters of done) the beams are placed, that form the bed, and breadth of the bridge;
upon which, a little space being lelt at their ends, were placed other beams lengthways,
which sorm the lides. Over theie, directly upon the firsl, the colonelii on each side were
dilpoled (ib we call those beams vulgarly, that in such works are placed diredly upright,-)
These colonelli are bound with the beams (which, as was said, formed the breadth of the
bridge) with irons which we call cramps, palling through a hole, made sor that purpose in
the heads of the laid beams, in that part which advances beyond the beams thai sorm the
sides.
These cramps, because they are in the upper part along the laid upright and plain colo-
nelli, are persorated in several places. And in the under part, near the laid thick, beams,
by one hole only, sufficicntly large, they were driven into the coloncllo, and sattened after-
wards underneath with iron bolts, made, sor that purpose; they therefore made the whole
work to be in a manner united. The beams that form the breadth, and those os the (ides
being as it were, os one piece with the colonelli, support the beams that form the breadth
of the bridge; and those are alio supported by the arms that go srom one colonello to the
others, whereby all the parts are supported the one by the other; and their nature is such,
that the greater the weight upon the bridge, so much the more they bind together,
and increase the ttrength of the work. All the laid arms, and the other beams that sorm
the texture of the bridge, are but one foot broad, and but three quarters thick. But those
beams that sorm the bed ol the bridge, that I3J those that are laid long ways, are a great
deal smaller.
A, The /?,!■:/; os fly bridge.
B, The pilafters that are on the bank*.
C, The heads os the beams that form the breadth.
D, He hams that jorm the fides.
E, The colonelli.
F, 71. eramps, with the iron bolts.
G, Are the arms, which bearing contrary to each other, support the ivhole work,
11, Is the plan os the bridge.
I, Are the beams that sorm the breadth^ and advance beyond the fides, near which
the holes are made sor the cramps.
K, Are j'mallbeams that jorm the bed os the bridge.
CHAP.
*i
C H A P. VII.
Os the BRIDGE ffls GlS MO N E;
THE Qsmotu is a river, which salling from the mountains that divide Italy srom
6ermdnyt runs into the Bre/ita, a little above BaJJ'ano. And bccaulc it is very rapid, and
that by it the mountaineers send great quantities os timber down, a rciolutiun was taken
to make a bridge there, without fixing any polls in the water, as the beams that were
fixed there were (haken and earned away by the violence of the current, and by the
(hock os the ttones and trees that by it are continually carried down : wherefore Count
Giacomo Angarako, who owns the bridge, was under the nccettity of renewing it
every year.
Tin invention of this bridge is, in my opinion, very worthy of attention, as it may Plate 3.
serve upon all occtsiops, in which the laid disficulties {hall occur; and because that bridges
thus made, are ttrong, beautiful, and commodious: strong, because all their parts mutually
support each other ; beautisul, because the texture of the timbers is very agreeable and com-
modious, being even and in the same line with the remaining part os the itrcet. The
river where this bridge was ordered, is one hundred foot wide ; the breadth is divided into
six equal parte ; and at the end of each part ('excepting at the banks, which arc llrcngthned
with pilasters of done) the beams are placed, that form the bed, and breadth of the bridge;
upon which, a little space being lelt at their ends, were placed other beams lengthways,
which sorm the lides. Over theie, directly upon the firsl, the colonelii on each side were
dilpoled (ib we call those beams vulgarly, that in such works are placed diredly upright,-)
These colonelli are bound with the beams (which, as was said, formed the breadth of the
bridge) with irons which we call cramps, palling through a hole, made sor that purpose in
the heads of the laid beams, in that part which advances beyond the beams thai sorm the
sides.
These cramps, because they are in the upper part along the laid upright and plain colo-
nelli, are persorated in several places. And in the under part, near the laid thick, beams,
by one hole only, sufficicntly large, they were driven into the coloncllo, and sattened after-
wards underneath with iron bolts, made, sor that purpose; they therefore made the whole
work to be in a manner united. The beams that form the breadth, and those os the (ides
being as it were, os one piece with the colonelli, support the beams that form the breadth
of the bridge; and those are alio supported by the arms that go srom one colonello to the
others, whereby all the parts are supported the one by the other; and their nature is such,
that the greater the weight upon the bridge, so much the more they bind together,
and increase the ttrength of the work. All the laid arms, and the other beams that sorm
the texture of the bridge, are but one foot broad, and but three quarters thick. But those
beams that sorm the bed ol the bridge, that I3J those that are laid long ways, are a great
deal smaller.
A, The /?,!■:/; os fly bridge.
B, The pilafters that are on the bank*.
C, The heads os the beams that form the breadth.
D, He hams that jorm the fides.
E, The colonelli.
F, 71. eramps, with the iron bolts.
G, Are the arms, which bearing contrary to each other, support the ivhole work,
11, Is the plan os the bridge.
I, Are the beams that sorm the breadth^ and advance beyond the fides, near which
the holes are made sor the cramps.
K, Are j'mallbeams that jorm the bed os the bridge.
CHAP.