DOI Page / Citation link:
https://doi.org/10.11588/diglit.62828#0168
I no )
The term Dome generally implies a vaulted, arched, or
fpherical roof. Some derive it from domus, a houfe, and others
from the barbarous Latin doma, a roof or open porch.
When an arched roof is raifed from a fquare or oblong
plan, it is called an Hip Dome, becaufe they require mitre
ribs at each angle, uniting in a center at top. But thofe domes
which take their rife from an oval plan are called Elliptic; and,
laftly, thofe which have an odagon or hexagon for their plan
may be ftyled Polygonal Domes.
Prob. XXXII. Fig. 35. Plate VII.
To conftrud an Hip Dome.
Operation.—Let A B C D be the under tefter, upon which
another tefter is to be fixed to receive the ribs of the dome.
Draw the diagonals DB and A C, and their interfedion will be
the center for the dome. Draw a right line through the cen-
ter parallel to A B; draw another line through the center at
right angles with it, then will the diagonal lines be the plans of
the hip ribs, and thofe at right angles to each other will be the
plans for the center ribs. Draw a circle from the center of
the dome of about eight inches radius, as the figure fhews,
which is intended as a ground for ornament in the center of
the
The term Dome generally implies a vaulted, arched, or
fpherical roof. Some derive it from domus, a houfe, and others
from the barbarous Latin doma, a roof or open porch.
When an arched roof is raifed from a fquare or oblong
plan, it is called an Hip Dome, becaufe they require mitre
ribs at each angle, uniting in a center at top. But thofe domes
which take their rife from an oval plan are called Elliptic; and,
laftly, thofe which have an odagon or hexagon for their plan
may be ftyled Polygonal Domes.
Prob. XXXII. Fig. 35. Plate VII.
To conftrud an Hip Dome.
Operation.—Let A B C D be the under tefter, upon which
another tefter is to be fixed to receive the ribs of the dome.
Draw the diagonals DB and A C, and their interfedion will be
the center for the dome. Draw a right line through the cen-
ter parallel to A B; draw another line through the center at
right angles with it, then will the diagonal lines be the plans of
the hip ribs, and thofe at right angles to each other will be the
plans for the center ribs. Draw a circle from the center of
the dome of about eight inches radius, as the figure fhews,
which is intended as a ground for ornament in the center of
the