Excalibur Screwbolt

Screwbolt


Product Specifications


Unique Features

  • One fixing for all substrates
  • Available in a wide range of head styles, lengths and diameters.
  • Twin helical thread gives secure grip over full embedment.
  • 30 degree helix angle for fast insertion with power or hand tools (eg. 3 turns= 4Ømm embedment on 8mm).
  • Wide pitch producing high strength grip without distressing surrounding substrate.
  • Deep thread engagement results in high performance.
  • No expansion provides close to the edge fixing ability.
  • Self tapping of thread into substrate allows for removal and replacement.
  • Site conditions vary greatly, as also do the materials encountered on site. Excalibur recommend that the user or specifier satisfy themselves of the suitability of the product for use in any application. Excalibur offer an 'on site' testing facility to assist in determining product suitability for major projects.

Excalibur maintain a policy of continual product development and testing. The performance data contained in this site should only be used as a guide as the full technical information and independent test reports are up-dated on a regular basis. Samples available for testing.

For the latest information, technical assistance and advice with your fixing problems, please contact us.

Performance

The Excalibur Screwbolt is the first Universal anchor primarily designed for use in all spectrums of industry.

Its unique twin helical thread ensures high tensile-shear-close to edge and centre spacing safe loadings. Wood, concrete block, brick and all grades of structural concrete are Excalibur Screwbolts' major areas of application. It can also cut a thread into steel. Screwbolt negates the need to change fasteners just because part of the job is fixed to brick, part to concrete and part to timber.

Excalibur Screwbolt's versatility enable it to replace virtually all the traditional masonary fasteners currently available. For example, sleeve anchors, drop-ins, knock-ins, through bolts and resin anchors can be replaced by Excalibur Screwbolt.

The Screwbolt range of products have been tested by the Imperial College London to UEAtc M.O.A.T 49 1992 standards. Continual testing is part of our ongoing quality assurance.

For the latest design information, please contact us.


TECHNICAL DATA

Material Boron Steel BS3111/9/2.1.A/10B21
Finish Zinc & yellow passivated is standard.
Other Finishes Galvanised-type platings and other finishes are available for special order, subject to quantity.
Tensile Strength Case hardened
Other Sizes Other lengths of all diameters are available to special order subject to quantity
Embedment Concrete
& Brick
Minimum recommended is 4.5 × bolt diameter
Soft Block Embedment Minimum recommended is 75mm
Edge distance Not affected by reduction factor. 10 × bolt diameter

 

GUIDE TO SCREWBOLT PERFORMANCE DATA

The performance figures shown in the Technical data on each of the product bolt diameter pages in concrete are supported by tests carried out to UEAtc M.O.A.T 49 1992 by Independent Test Houses. The Brick and Block figures are actual results from Independent Test Houses. These results are further supported by extensive on site and in house testing and copies of both the Independent Test House results and of the site and in house tests are available on appplication.

The safe working data is calculated from MEAN ULTIMATE LOAD ie. Mean Ultimate Load / 3 MEAN ULTIMATE LOAD = Mean value from at least 5 individual tests in unbroken material.
(Characteristic loads for Screwbolts in Concrete are available on request).

Site conditions vary greatly, as also do the materials encountered on site. Excalibur recommend that the user or specifier satisfy themselves of the suitability of the product for use in the application. To assist in this, Excalibur offer an on site testing facility in determining product suitability for major projects.

Excalibur maintain a policy of continual product development and testing. The performance data contained in this website should only be used as a guide. The full technical information and independent test reports are up-dated on a regular basis.