„One piece doesn’t make statistics”. Rawlplug’s fixing strength tests

2. Secondly, we always assume the theoretically least favourable, i.e. the most shallow fixing depth. 

3. Thirdly, we verify the results. 

Compression, bending, screwing time trials, and... freezing

In addition to pull-out tests, we perform shear strength tests: by positioning the block properly, we can achieve a force exerted at an angle of 90° to the plane of the screw head plane. For timber fasteners, in turn, we test the force at which the head is pulled through a timber beam. Our everyday practice also includes tensile strength tests focused on the material parameters of the steel from which the fixing piece is made.

We can test compressive or bending strength, as well as look for the force needed to push a nail into wood. Using a torque wrench, we carry out twist-off tests for screw heads. In specialised applications, impact strength is also checked, which is a standard test in the case of roof sleeves. 

An unusual procedure involves strength testing on a machine that simulates the properties and behaviour of cracked concrete. Test of this type are particularly important for fixings intended for seismic applications.

Anchors are also subjected to strength tests. The test plan differs slightly depending on the type of bonded anchor, but we test every lot manufactured. As part of double verification, we also test the chemical raw materials used in the production of our bonded anchors, even though we obtain certificates from the tests carried out by the suppliers.

Many of the tests performed in Rawlplug's laboratory are specialised and commissioned by customers who use our products for non-standard applications or in atypical conditions. They often provide the basis for product upgrades and the preparation of new designs that meet practical installation needs even better.