24mm Chemical Anchor Bolt with Forged Integral Head

Physical Properties
Mass Per Metre	2.92kg
Bar Core Diameter	21.7mm
Cross Sectional Area of Bar	370mm²
Major Bar Diameter	23.2mm
Bar straightness to AS 1442-1991
Rolled Thread M24x3.0mm Pitch

Standard Strength Bolt	Minimum		Typical
Yield Strength	250MPa	95kN	300MPa	110kN
Ultimate Tensile Strength	410MPa	150kN	475MPa	175kN
Calculated Shear Strength	100kN		115kN
Standard Elongation	22%		35%
Uniform Elongation			12%

HighStrength Bolt	Minimum		Typical
Yield Strength	375MPa	140kN	400MPa	150kN
Ultimate Tensile Strength	570MPa	210kN	680MPa	250kN
Calculated Shear Strength	140kN		170kN
Standard Elongation	17%		22%
Uniform Elongation			10%

General Features

Manufactured from a special hot rolled deformed bar designed by DSI and commonly known as "Left Hand Anchor Bar", this bolt features a rib pattern which actively assists with mixing the chemical anchors during installation.
The deformed bar rib pattern improves load transfer properties.
The 24mm chemical anchor bolts have a hot forged integral head,
30mm & 36mm square Hex Heads are used in areas where headroom is low or when bolt tails are undesirable, flat plates are generally used with headed bolts and are un-tensionable.
The 24mm chemical anchor bolt is designed to be used with chemical anchors (refer to Section F), but can be effectively used with cementitious grouts.
In some circumstances these bolts may be used with an expansion shell by the addition of a M24x3.0mm thread on the up hole end of the bolt.
Corrosion protection may be provided by hot dip galvanizing (refer to Section G). Alternative coatings are available by negotiation.
Australian Patent Number 536627 is applicable to the bar design of this bolt.

Installation Guidelines

27-28mm hole diameters are preferred. If larger diameter holes are be used refer to "Posimix" bolts on page A1.10.
Hole depth is critical. Hole depth should be slightly longer than the bolt length to ensure that the bolt plate and bolt head are tight to the roof after installation.
After insertion of the chemical anchors the bolt is rotated through the anchors while being pushed to the back of the hole.
It is important to follow the chemical manufacturer’s recommended mixing and hold times as printed on the chemical anchor cartons. DO NOT OVER MIX.
For further details of installation procedures refer to DSI's "Practical Guide to Rock Bolting."

Standard Lengths & Packaging

Standard bolt lengths range from 600 to 3000mm in 300mm increments.
Non-standard requirements are available by negotiation.
Bolts are packaged in bundles.

Notes

Only DSI rock bolt components should be used to enable the optimum performance of the bolt system to be obtained.
DSI Mining Products Division is Quality Assured to ISO 9001:2000, Registration No.QAC/R61/0315.

PRINTED December 2006: All dimensions, weights, quantities and specifications are those applicable at the time of publication and may be amended from time to time.