Undercut can be adjusted if floor conditions warrant. UNDERWRITERS LABORATORIES, INC. FD 1/3 HOUR FIRE DOOR APPROVAL (STC 28 and STC 43) ACOUSTICAL DOOR ACCESSORIES Type of Sound Transmission Transmission loss at various frequencies (Hertz) Door weight* installation Class (STC) 125 250 500 1000 2000 4000 lbs/sq ft kg/M2 Single door (with lite opening) 39 26 31 38 41 40 44 6.5 31.7 Single door 40 24 38 40 43 40 41 6.4 31.3 Single door 20 minute label 43 24 35 42 44 45 50 7.1 34.7 Single door with

Special services Gasketing and drop seal are supplied with doors. Threshold supplied with STC 45, STC 43 and STC 39 doors. Positive Pressure Category B: Singles and pairs require a category G edge seal applied to the frame. Pairs also require a category G edge seal applied to one of the meeting edges. 1001 Perry Street • Algoma, Wisconsin 54201 920.487.5221 • 1.800.678.8910 • FAX 920.487.3636 Door 43 • sales@algomahardwoods.com SR Acoustical & Acoustical FD 1.3 Hour Door MAXIMUM OPENING SIZE Sin

STC 40/STC 45 STC 43 with 1/3 Hour LabelSTC 39 with Lite Opening When job requirements include doors with glass openings, STC 39 Acoustical doors are available, non-labeled. And for communicating doors, a STC54 rating is achieved when two STC-40 Acoustical doors are installed back-toback in the same opening. Testing was conducted by Riverbank Acoustical Laboratories in accordance with ASTM E90-90 and E413-87. Algoma uses only face veneers at least .020"(0.5mm) thick at 12% moisture content. Prod

Sound Transmission Class (STC) 40 Acoustical doors should be used wherever the degree of sound insulation desired is higher than an ordinary solid core door can provide. If a still higher degree of sound Hardwood face veneer reduction is required, such as in and medium density overlays hospitals, doctors’ offices or conference rooms, the STC 45 Acoustical door may be specified.STC 43 Acoustical doors are available for openings which require both sound control and 1/3-hour fire ratings. STC 40/ST

PC-7 is a commercial door made with particleboard core and skins. Solid lumber outer stiles along with Structural Composite Lumber (SCL) rails and inner stiles, are glued to the core prior to cold pressing a 3-ply skin each side of the core at ambient air temperature. Algoma Hardwoods, Inc uses only the better of two grades of door core particleboard conforming to ANSI Standard A208.1-1989, Grade LD-1. Algoma Hardwoods, Inc. uses only skins with face veneers at least .020" (0.5mm) thick at 1