Rojak Design
Stopper Extenders Multistopper Spyder

Testing

General Information

For twenty years Rojak Design, has been a company dedicated to designing and manufacturing ladder stabilising equipment for converting naked ladders into safe ladder systems. In 1995 along with various independent ladder and stabiliser companies we founded the Ladder Systems Manufacturer's Association LaSMA (please see About Us page).

Thirty years ago access towers, podium steps, cherry pickers, scissor lifts, fall arrest equipment, rope access equipment, airbags, etc. were virtually unheard of, but now are an integral part of the access industry.

We are careful not to introduce products to market without carrying out detailed research and testing.

Our ladder stabiliser products go through the following process

  1. Design and then being transferred to CAD machine.
  2. Prototypes are made and developed.
  3. Before going into production individual parts are tested for strength and performance
  4. Field and laboratory testing.
  5. Then the finished completed products are tested for stability and performance - see Specific Testing.

Please note there is no Standard Stability Test for ladders nor is there a strength or performance test for ladder feet. When we first produced our Extenders/Stopper feet for the MultiStopper system we tested them at AMTAC Laboratories - now Bureau Veritas - who took them into the laboratory and bounced a 150 kg weight on each 1.25 million times. Recently we instructed the British Standards Institute to test the new Stopper feet which are made from polypropylene. In a destruction test each single foot resisted a downward weight in excess of 200 kg - the ladder will obviously stand on two of these feet. Again, see Specific Testing.

We regard testing as a means of monitoring the performance of our products and that they are truly fit for purpose. We don't aim to pass tests at the lowest level. Consequently we build generous safety factors into both materials and performance.

Specific Testing

BSI have carried out performance tests on a Stopper, MultiStopper and Spyder and compared these with what HSE describes as a naked ladder - i.e. a ladder bought off the shelf with no enhancements or attachments. The tests were carried out on virtually frictionless surfaces to present the “worst case scenario”. See BSI Test ref 7181697.

In separate tests to measure bottom slip a ladder carrying the equivalent weight of a man was set up on the substrate at an angle of 65 degrees - a common working angle - and it just fell flat to the floor; see page 4 of test report opposite. See BSI Test ref 7141067.

For any further information about Rojak Testing please contact us.

For further information about BSI testing please go to:

www.bsigroup.com/productservices