Wall support strap
a technology of supporting straps and straps, which is applied in the direction of shaft linings, tunnel linings, underground chambers, etc., can solve the problem that the side regions of straps which are not contacted by the washers are not directly supported against the hanging wall
Inactive Publication Date: 2018-01-04
PAGE MARIUS
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- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The present invention is about a new wall support strap for building construction. The strap has a plurality of tendons that extend for the full length of the strap and transverse strap members that connect them. The tendons are securely held in space by middle region strap members while the outer tendons meet with inner tendons in the end regions. The end region strap members are elongated strips with folded-over end sections that securely hold the tendons. The middle region strap members are flat strips with slits that allow the tendons to pass through. The strap also includes connection means to securely connect the outer tendons to the inner tendons. The strap members can have alternating receiving formations and strengthening formations. C-shaped resilient clips, prop-receiving formations, and other clipping mechanisms can be used to securely hold the tendons in place. The strap member can also have a dome-shaped indent for receiving a prop. These features improve the stability and connection of the tendons in the strap.
Problems solved by technology
A problem with the conventional fixture system as described above is the fact that the roof bolt washers are typically arranged and are so dimensioned that they press only against a central region of the strap and do not act at all against side regions of the strap.
As a result, the side regions of the strap which are not contacted by the washer are not directly supported against the hanging wall.
Method used
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Embodiment Construction
[0027]FIGS. 1 to 3 illustrate three embodiments of a wall support strap 10 according to a first aspect of the present invention.
[0028]FIG. 1 shows an end of the elongate wall strap 10 according to the first embodiment of the invention. It may be assumed that the opposite end of the strap is similar to the illustrated end. The wall support strap includes four tendons 12 in the form of round section steel bars, typically a 5 mm diameter, which extend to the full length of the strap, typically 1.5 m to 2.5 m or more. It also includes transverses strap members 14 and 16. The tendons 12 can also be square or rectangular bar that may be stronger than round bars of similar size and which will provide a larger contact surface for a washer used together with a rock bolt to anchor the ends of the straps to a wall in a mine working such as a hanging wall.
[0029]The strap members 14 in the middle region 28 of the strap 10 are each provided by flat steel strip 18, in this case of 350 mm overall l...
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This invention relates to a wall support strap. According to one aspect of the present invention there is provided an elongated wall support strap comprising a plurality of tendons which extend for the full length of the strap and a plurality of transverse strap members which extend transversely to the 5 tendons and connect them to one another, opposite end regions of the support strap being narrower than a middle region thereof situated between tendons, the tendons in the middle region being held in spaced apart, generally parallel relationship by middle region strap members while outer tendons in the end regions converge on and are connected to at least one 10 inner tendon in the end regions by end region strap members.
Description
FIELD OF THE INVENTION[0001]This invention relates to a wall support strap.BACKGROUND TO THE INVENTION[0002]One well-known wall support strap which is widely used in underground mining operations to provide localised or micro-support, typically for a hanging or side wall in a mine working, is the so-called “Oslo” strap. This has a number of round bar steel tendons which are held together in a spaced apart, parallel array by means of “pigtail” strap members. These are round steel bars which, at regular intervals, are bent to form loops or pigtails. The tendons pass through the loops and welds connect the tendons to the strap members at each loop.[0003]Known wall support straps of this general type have a rectangular shape in which the tendons, defining the length of the strap, are equally spaced from one another throughout. The length of the strap, corresponding to the length of the tendons, may for example be 1.5 m to 2.5 m or more, and the width of the strap, corresponding to the l...
Claims
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IPC IPC(8): E21D11/15
CPCE21D11/152
Inventor PAGE, MARIUS
Owner PAGE MARIUS