Stc 40 Door
Up to 4 0 x 8 0 standards.
Stc 40 door. Door edges match the veneer of the door face. It will stop most mid to high frequency sound movement and lessen low range sound transfer. Factory applied baked on rust inhibiting gray primer no special color options not intended to be a finish coat. The stc rating is calculated in accordance with astm e413 it s a single number rating for interior building partitions that are subjected to mid to high frequency noises.
A critical factor to understand when specifying acoustic doors and frames is the sound transmission class or stc rating. Certified astm e90 and astm e413. Exterior wooden doors are made using thicker materials than interior doors. Door elevation stc 40 41 sg4 acoustical tech sheet stc 40 45 sg4.
Stc is calculated by taking the transmission loss tl values tested at 16 standard frequencies over the range of 125 hz to 4000 hz and plotted on a graph. You generally need about an stc 40 door. Doors are often 1 3 4 to 2 1 4 or thicker. Any unsealed gaps and clearances in door assemblies effectively cancel out the noise reduction benefits of stc rated doors.
Soundproof doors are available 1 3 4 thick from stc 33 to stc 50. Face veneers are available in a variety of paint grade or stain grade options including birch oak walnut maple and cherry. Stc rating stc rating static door operable door perimeter seals door bottom threshold astragal panel w gasketing 35 35 5020 896s 5070. Soundproof doors are available at greater thicknesses from stc 51 to stc 56.
A well sealed door will have an stc between 40 and 50 or better. Stc 33 36 lbs to 40 lbs core 1ld2 core apc bond to core no lead standard stiles and rails. Pairs available to stc 47 stc 40 47 furnished with perimeter seals gaskets and threshold stc 48 52 furnished with perimeter seals gasketing surface mounted auto door bottom threshold and 5 cam lift hinges. Single flush doors available up to stc 52.
Interior doors opening into core learning spaces to achieve stc 30 or greater in their operable condition and interior doors into music rooms at least stc 40. If you are building a theater room or recording studio the stc rating of the door is irrelevant as your main concern will be in the lower frequencies not represented by stc. Up to 90 minutes stc 53 for singles and stc 48 for pairs.