Need for Two Air OpeningsI write in response to Julius Ballanco’s statement in a column last Fall (Sept. 2006) that there’s no justification for two air openings. Eliminating the requirements
Massive fires at the Jupiter Aluminum rolling mill in
Hammond, IN, and Sofa Super Store in Charleston, SC, reinforce the need for
sprinklered buildings.
Last
month, the author began a discussion of how tubing depth affects the thermal
performance of heated slabs by noting computer simulations that show the effect
is significant. This month he looks at bare
slabs, as well as some details for protecting tubing where it passes
beneath sawn control joints.
Through
all of the discussions about a single plumbing code, the third code in the
group, the PHCC-NA National Standard Plumbing Code (NSPC), seems to be the
forgotten code. The NSPC, however, is alive and kicking.