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An LssaV - Frequently asked Questions on Earth-sheltered Housing 149
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<br /> FIG. .5. .4 metal air supply trunk duct feeds air to selected cores of the precast concrete floor planks. The cores in
<br /> the plank then feed floor grills in individual rooms. This design is an effective integration of the structural and
<br /> HVAC systems. Water pipes, conduits, and other mechanical systems pose no problems with a concrete structure.
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<br /> FIG. 6. Another method of handling roof projections. Each pipe and mechanical service has a separate hole cut
<br /> through the precast roof panels. Extreme care must be taken to waterproof each projection thoroughly- Aesthetic
<br /> qualities should also be considered when using this approach.
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