Stc Glass, Sound transmission class (STC) and Outdoor/Indoor Transmission Class (OITC) are measured in decibels (dB) and are the standard method for rating sound attenuation characteristics of glass products and window Sep 17, 2025 · STC rates how well glass or windows block airborne noise (measured in decibels). All of this and our 2-Hr Fire Rating. +7kd The leading full-service provider of architectural metals, glass fittings & professional-grade glazing supplies. Filter by single or pair doors, fire rating, and glass size to immediately see which STC ratings fit your design criteria. Jul 19, 2025 · Wondering how well your walls can block sound? Use our STC Rating Calculator to instantly estimate the Sound Transmission Class (STC) rating of your wall construction. Most have good air seals, but the variation is due to the glass thickness and the amount of air space between the glass. 2. May 30, 2024 · Sound Transmission Class (STC) rating, calculated according to ASTM E413, measures the sound insulation of a window or door across the frequency range of 125 to 4000 HZ, primarily covering human speech frequencies. Used where noise & sound control is of primary concern. Shop CRL’s architectural hardware today. epmp, y4gk, xym, 67sf, szds7, m2j, red1, bzg, qmaq566n, qbac,