Did you find what you were looking for?

Thread bar 500

threadbar-500

No reduction in load capabilities as threads exceed the nominal bar diameter. Robust thread design accepts harsh conditions without affecting threadability. Increased bond strength achieved owing to large surface area of ribs. Continuous thread enables retensioning in the event of ‘scaling’, as well as cutting of the bar at any point.

  • No reduction in load capabilities as threads exceed the nominal bar diameter
  • Robust thread design accepts harsh conditions without affecting threadability
  • Increased bond strength achieved owing to large surface area of ribs
  • Continuous thread enables retensioning in the event of ‘scaling’, as well as cutting of the bar at any point
  • Thread profile offers excellent mixing capabilities in resins installation
  • Thread profile is ideally suited to hot-dipped galvanising, whilst maintaining threadability of the system.

A wide choice of components offer a variety of anchor head designs to suit installation requirements.

Steel grade Nominal diameter (mm) Nominal cross sectional area (mm2) Max. diameter over ribs (mm) Min. yield load (kN)
In accordance with SABS 920 1985 16
20
25
201
314
491
18.0
22.5
28.0
100
152
245

A range of hardware to accommodate spinning and tensioning activities in Thread Bar 500 installation is offered. The following stock items are available:

  • TB 500-TENSIONER – Adaptor unit enabling tensioning of anchor nut by means of jackhammer. Socket head accommodates the anchor nut and the hexagon drive-shaft suits the jackhammer
  • TB 500-SPINNER – Adaptor unit enabling spinning of bar for resin installations
  • TB 500 ‘T’ SPANNER – Manual tensioning unit with extended socket head allowing easy access to workplace. Provides tensioning capabilities in areas where jackhammer availability and time is limited.

Expansion shells provide an efficient and simple means of point anchoring in hard rock conditions. Available in a range of sizes to accommodate borehole diameters used in the industry.
Expansion shells offer the following advantages:

  • Application is simple and widely accepted
  • Reliable anchoring is achievable in dry and wet boreholes
  • Spring-loading the expansion shell prevents any slippage when tensioning anchor head
  • Cementitious grouting by means of pumping over the bar or shot capsules, makes the installation permanent following the setting thereof.

The relationship between borehole, capsule and bar diameters is critical in ensuring efficient and correctly installed bars. Correct installation will result in an anchor which offers the following advantages:

  • Excellent bond between resin, bar and borehole
  • Early load-bearing capabilities
  • Upgrading of rock strength surrounding the borehole owing to resin penetration
  • High level of corrosion protection.

The ribbed profile and coarse thread of the Thread Bar 500 provides excellent mixing capabilities when spinning through resin capsules. This can be further enhanced by deforming the leading end of the bolt into a ‘kinked’ profile as shown.

TB 500 diam. (mm) Borehole diameter (mm)
28mm 30mm 32mm 36mm 38mm 40mm
16
20
25
25

25
25
28
25
32
28
25

32
28


32