Searching for Secondary Roof Support information? Find all needed info by using official links provided below.
https://www.cdc.gov/niosh/mining/UserFiles/works/pdfs/osrsw.pdf
Secondary support provides additional roof support in the event of failure of the primary support system. When properly designed, secondary support will also assist the primary support in controlling the integrity of the immediate roof beam. Hence, roof support should be thought of as a three-part system: (1) the remaining coal pillars
https://www.hunker.com/13417886/ways-to-add-extra-support-to-roof-trusses
The other is just used to support the trusses. A great deal depends on the pitch of the roof. A higher-pitched roof would be better for extra living space than a lower-pitched roof. Once again, a 2-by-4-inch piece of lumber is placed between the trusses and parallel to the ceiling joists. This is where a high-pitched roof is necessary.
https://www.cdc.gov/niosh/mining/works/coversheet1514.html
Several new support technologies have been developed in recent years to replace conventional wood and concrete cribbing for secondary roof support. Since their performance characteristics are unique, the best practices that have been developed with conventional wood cribbing may not be applicable for these alternative support technologies.
https://stacks.cdc.gov/view/cdc/8310/cdc_8310_DS1.pdf
Secondary roof support systems play a vital role in preserving the safety of underground mine workers by preventing the unintentional collapse of the mine roof. Hundreds of thousands of standing roof supports are constructed each year in underground coal mines.
http://stacks.cdc.gov/objectView!getDataStreamContent.action?pid=cdc:8307&dsid=DS1&mimeType=application/pdf
Secondary Support - Secondary support is support that is intentionally added to assist the primary support (roof bolts) in controlling the mine roof when it is known that additional roof loading will occur. In longwall mining, secondary support is in-stalled in advance of abutment loading. Secondary support is not
https://www.pmengineer.com/articles/86232-secondary-roof-drainage-an-essential-of-good-design
Aug 01, 2007 · Secondary Roof Drainage: An Essential of Good Design. August 1, 2007 ... Many commercial buildings utilize barrel-vaulted roofs or slope the roof support system to direct the water to one side where it can be collected in gutters or open-topped downspouts. ... Given that allowing for a secondary method of roof drainage is so intuitive, it would ...
https://barton-supply.com/2018/04/18/primary-and-secondary-steel-framing-building-components/
Apr 18, 2018 · Providing the stabilizing members that prevent the main frame from twisting out of shape, secondary components can also contribute to the structural support and provide the means to attach wall, roof and interior elements. The secondary framing usually transfers loads to the main frame.
Stratajacks offer a cost effective, lightweight and efficient alternative to other roof support system for the underground mining industry. Stratajacks are specifically engineered and can be customised to meet all types of mining applications.
https://undergroundss.co.za/
During this time secondary support service was also started and in nearby future primary support will also be a service offered. Roof support includes, pillar wrapping, air support with Gophers, mechanical support with hydraulic/electric roof bolters, wire mesh installation on hanging roof and rib sides and high wall support.
https://archinect.com/forum/thread/149971695/primary-vs-secondary-structure
Other examples of secondary structure would be the lintels in masonry walls, the shelf angles that support finishes when they span over a window or other opening and there are other odd and ends that provide support or stabilization such as cross bracing in steel bar joist or structural elements used during the construction of the building.
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