ASTM F432 PDF

Addressed in this specification are double-end threaded and slotted steel bars; fully grouted bolts and threaded bars; mechanical anchorage devices used for point anchorage applications; roof truss systems; partially grouted deformed bolts; formable anchorage devices; cable bolt systems; and other frictional anchorage devices. All of these products represent various designs used for ground support systems. This specification can be revised to address new technologies. No other units of measurement are included in this standard.

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Designation: F — Copyright ASTM. Roof and Rock Bolts and Accessories 1. An American National Standard. A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval. All of these products represent various designs used for ground support systems. The values given in parentheses are for.

This standard does not purport to address the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Referenced Documents. Current edition approved Jan. Published March Originally published as E 53 — Last previous edition F — This altered section may be produced by hot or cold forging, or by shearing,.

The combination of spherical washer together with a depression in the bearing plate produces a ball-and-socket joint permitting bolts to be installed at a slight angle to the rock face while still maintaining the face of the bolt head perpendicular to the bolt axis. F They are used in a manner similar to the bolts described in 3. When each assembly is driven into a bottomed hole, the wedge spreads the slot and an anchorage is produced.

Ordering Information. It is necessary for the user and the manufacturer to establish the. See Annex A1 and Appendix. X1 for additional information. Manufacturing Processes. Threaded Slotted Bars :. Burned slots of Grades 55 and TABLE 1. Chemical Requirements. Phosphorus, max,. B Check analysis for sulfur if a resulfurized steel is not technically appropriate.

Slotted Bars :. Steel shall conform to the requirements shown in. Table 1. Materials for Formable Anchors :. A , Grades Users must ensure that the formable anchor material offered is suitable for its intended use. Chemical Composition. Bearing and header plates may be strengthened by. Section 5. Washers :. Chemical analyses for steel products shall be performed. Hardened steel washers shall be through hardened.

Materials for formable anchors shall conform to the. Case-hardened washers are not permitted. A Appropriate nuts for each grade of threaded bar are. TABLE 2. Appropriate Nuts.

A , Grade 1; A , Grade B. A , Grade 2; A , Grade C. Mechanical Properties. The minimum grade rating permitted shall be 20 lbf TABLE 3. Mechanical Properties of Steel Bars for the.

Yield Point min, psi MPa. Elongation in 8 in. Strength min,. A Test of bars shall be performed full size. B Higher grades would be produced in 20 psi increments. The minimum tensile strength shall be 25 psi above the minimum yield strength. C Actual bar diameters are somewhat less than nominal, especially when roll threading methods are employed.

D Grade 40 and 60 only apply to deformed bar. Bolts and threaded bars made from plain material must contain some design feature to provide interlocking between the steel and the grout. These items can be supplied threaded or headed.

The normalizing heat treatment and the removal of material from the slot, whether it be by burning or sawing, will result in lower test values. When either the burning or sawing or other methods involving metal removal are used, the. Dimensions, Mass, and Permissible Variations. N OTE 2—Thread size variations can be expected due to bar diameter and out-of-round variations.

Information on this increased tolerance is described in Note 3. N OTE 3—External threads that are to be used with threaded tapered plugs in expansion anchors are permitted to have somewhat increased pitch and major diameter tolerance. As bolt load is increased, the tendency for thread failure through nut diametrical expansion normally increases; however, in the case of threaded tapered plugs, increased load is accompanied by an increasing compression of the internal threads onto the external threads.

This compensation for decreased major diameter is further augmented by the length of engagement which is longer than for standard nuts.

Nuts to be used with threaded bars and threaded slotted bars shall be selected to provide adequate strength under these thread conditions. This oversize is an increase in the pitch diameter of 0. Pitch diameter and thread crest. It may be used only when sufficient clearance is available between the threaded-bar or threaded- rolled-bar body diameter near the head and the washer hole.

TABLE 4. Thread Stress Area, in. Yield lbs. Ultimate lbs. A Tests of bolts and threaded bars shall be performed using full-diameter products. B Information for Gr 40 and 60 only applies to deformed bars. C Required yield and tensile loads shown are calculated by multiplying thread stress areas times the yield point and tensile strength values shown in Ta ble 3.

Thread stress area is calculated from the mean root and pitch diameters of adrenal threads as follows:. Gr 40 products are not covered. TABLE 5. Nominal Diameter,. Thread Stress Area, min, in. Grade Yield Load, min, lbf kN B. Ultimate Tensile Load, min, lbf kN B. A Tests of bolts, threaded bars, and threaded slotted bars shall be performed using full-diameter products. B Required yield and tensile loads shown are calculated by multiplying thread.

Thread stress area is calculated from the mean of the mean root and pitch diameters of Class 3 external threads as follows:. Bearing plates for direct bearing applications shall be 6 by 6 in. TABLE 6. Plug Grade Rating System.

Grade 1.

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Standard Specification for Roof and Rock Bolts and Accessories

Designation: F — Copyright ASTM. Roof and Rock Bolts and Accessories 1. An American National Standard. A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval. All of these products represent various designs used for ground support systems.

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Active view current version of standard. Other Historical Standards. Work Item s - proposed revisions of this standard. More F Addressed in this specification are double-end threaded and slotted steel bars; fully grouted bolts and threaded bars; mechanical anchorage devices used for point anchorage applications; roof truss systems; partially grouted deformed bolts; formable anchorage devices; and other frictional anchorage devices. All of these products represent various designs used for ground support systems.

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ASTM F432 Bolts

Active view current version of standard. Other Historical Standards. Work Item s - proposed revisions of this standard. More F

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