LP FlameBlock Fire-rated OSB U350A

1:41    Commonly used in load-bearing partition walls in multifamily construction, including townhomes. Labor/material cost savings and reduction in dead load due to elimination of a layer of gypsum (vs. WP3820). Cost-effective, space-saving alternative to area separation fire walls using shaft liner (vs. UL375).Sound Transmission Class (STC) rating of 62

LP FlameBlock Fire-rated OSB U350B

2:21    Commonly used in load-bearing partition walls in multifamily construction, including townhomes. Labor/material cost savings and reduction in dead load due to elimination of a layer of gypsum (vs. WP3820). Cost-effective, space-saving alternative to area separation fire walls using shaft liner (vs. UL375).Sound Transmission Class (STC) rating of 62

Mechanical Pressure

(0:54) Untreated outdoor air leaks into— infiltrates—the building when indoor pressure is less than the pressure outside. Control strategies typically strive to limit or eliminate infiltration as a means of minimizing HVAC loads and related operating costs. Conditioned indoor air leaks out of— exfiltrates from—the building when the pressure inside is greater than

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