![]() When unusual or special door usage conditions are encountered, contact a representative member of the Steel Door Institute for consultation and guidance. Where optional door levels and models are indicated, further analysis on an individual job basis is recommended. Table 2 is a reference aid matching standard duty, heavy duty, extra heavy duty and maximum duty doors with general usage requirements within the classification of buildings. Other criteria to be considered in door selection are: conformance to local building codes and fire code regulations sound attenuation and/or insulation requirements and architectural design and appearance. Selection of standard steel doors for general usage is made by analyzing criteria such as frequency of use, including subjection to and degree of possible abuse. rails may be specified in stainless steel, Fused Metal or Elemental Metal. VT fire-rated doors meet or exceed life safety requirements while maintaining the visual integrity of the door without sacrificing your. All VT acoustical doors are tested operable with gasketing. ![]() Our STC offering offering includes STC-33, 38, and 40. Recommended minimum gauge requirements for the various levels and models of standard steel doors are indicated in table 1. Stile & Rail Doors combine visual sophistication with extraordinary design. When sound reduction is required, VT acoustical doors are the perfect solution. The standard steel door construction models are full flush, seamless and, stile and rail. Standard steel doors are classified in four levels: Level 1 – 1-3⁄4″ and 1-3⁄8″ standard duty, Level 2 – 1-3⁄4″ heavy duty, Level 3 – 1-3⁄4″ extra heavy duty and Level 4 – 1-3⁄4″ maximum duty.Įach of the four levels noted above offer a range of construction models and designs to meet architectural requirements for preference and appearance. To establish guide criteria for the selection and usage of 1-3⁄4″ and 1-3⁄8″ standard steel doors. Constructed with honeycomb core, urethane foam core, vertical steel stiffened core flush or stile and rail.
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