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Domes should be designed for separate vent-
ing of the vaulted ceiling and the loft above it,
especially if moisture level due to occupancy
becomes high in cold weather.


Ornamental ceilings suspended under any
shape of roof are subject to damage by con-
densation unless the loft space 6bove the ceiling
is properly and adequately vented.


84


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1411-





THE SIZE OF THE AIR PARTICLES or the closeness of the air films affects the movement of heat by
convection.


The thickness of the film that clings to surfaces is approxi-
mately constant in still air; hence, in a given space, if fibers
are small, they provide more surface and hold more air
then large fibers which may leave paths for air to move freely


by convection. Even within cells there is an air filmm. If the
cell is large the free air within can set up minute convection
currents, thus transmitting some heat across the cell. Small
cells have no such convection movement.


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CELLULOSE FIBERS VEGETABLE FIBERS


VERMICULITE COTTON


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Figure 15 5
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g. 12. bmumpls of -e "o*pe" erchactural motrlah that can be usd as fednugs for sound.oboh g i r


































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Fig. 34.26 Schematic comparison of speech privacy in enclosed and open plan offices.


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Fig. 28. Schematic representation of constructions required to control the transmission
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Fig. 33. Steep uaoting minimizes audience attenuation



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Fig. 34. A sound-reflecting ceiling reinforces the direct sound to the audience


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Adjustable sound
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Fig. 34.22 Auditorium with adjustable elements.


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