Expansion Shell Bolt with Forged Integral Head

Physical Properties

16mm Bolt	Minimum		Typical
Yield Strength	400MPa	65kN	460MPa	75kN
Ultimate Tensile Strength	590MPa	95kN	645MPa	105kN
Calculated Shear Strength	60kN		70kN
Standard Elongation	17%		22%
Uniform Elongation			12%
Mass Per Metre			1.21kg
Bar Diameter			14.4mm
Cross Sectional Area of Bar			160mm²
Bar Straightness to AS 1332-1992
Rolled Thread M16x2.0 Pitch

20mm Bolt	Minimum		Typical
Yield Strength	375MPa	95kN	440MPa	220kN
Ultimate Tensile Strength	540MPa	135kN	635MPa	190kN
Calculated Shear Strength	90kN		110kN
Standard Elongation	19%		22%
Uniform Elongation			12%
Mass Per Metre			1.99kg
Bar Diameter			18.0mm
Cross Sectional Area of Bar			250mm²
Bar Straightness to AS 1332-1992
Rolled Thread M20x2.5 Pitch

General Features

Manufactured from round bar with a hot forged integral head on one end and a rolled thread on the other end.
Expansion shell bolts are compatible with DSI expansion shells. Refer to Section B4.9 for details of the expansion shell range.
Expansion shell bolts with integral head, are suitable for use in areas where headroom is low or when long bolt tails are undesirable.
The rolled thread strength is nominally equal to the column strength of the bar.
For longer term installations these bolts can be grouted with cementitious grouts.
Corrosion protection may be provided by hot dip galvanizing (refer to Section G). Alternative coatings are available by negotiation.

Installation Guidelines

It is imperative that the bolt hole diameter suits the expansion shell to be used.
The length of the hole must be longer than the bolt by approximately 50mm.
The expansion shell, supplied separately, is screwed onto the bolt until the bolt thread just protrudes through the expansion shell plug.
After placing the bolt in the hole to its full length, the bolt head is rotated to set the shell and tension the bolt.

Standard Lengths & Packaging

Standard bolt lengths range from 900 to 2400mm in 300mm increments.
Non-standard lengths are available by negotiation.
Bolts are packaged in bundles with threads protected by heavy duty polyethylene bags.

Notes

Only DSI rock bolt components should be used in order to obtain full performance of the bolt system.
DSI's 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.