Electronic enclosures are widely used to support and to enclose electronic equipment such as relays, computer components, switching gear etc. Electronics are usually housed within an enclosure formed of aluminum, steel, or plastic. There are numerous commercially available enclosure constructions for housing and containing various electronic apparatus. Generally, electronics enclosures have an upstanding frame provided with mounting holes for the attachment of shelf members that support the electronic equipment. The electronic modules or cards are inserted into guides or channels which orient the modules or cards within the enclosure. One of the purposes of housing electronic equipment in enclosures is to protect the electronic components from hostile environmental condition. Electronic equipment can generate significant heat during operation. The performance of the equipment can be affected by temperature. Performance may become undesirable if the electronics are subject to high temperatures or large temperature variations. Generally, cooling is achieved by providing airflow across the electronics to remove excess heat. Air filters are sometimes installed to limit the dust and particles. Electronic enclosures are required to shield against electronic components from electromagnetic interference (EMI) and/or radio frequency interference (RFI), and prevent significant amounts of EMI or RFI from radiating from the enclosure, as well as provide internal circuit-to-circuit shielding.