Timber iQ August - September 2019 // Issue:45 | Page 18

COVER STORY
The screws can penetrate quickly into laminated timber products.
a solution for screw connection problems as it ensures a
clean screw pattern and avoids tension cracks around the
screw hole.
The Spax decking screw itself has a fixing thread below
the head of the screw. This fixing thread on top holds the
decking boards in position. The cylindric head reduces the
impact of cracking. All Spax decking screws are made from
austenitic steel and not hardened stainless steel. The screws
are therefore rust-proof and flexible on the bending stress
and strain in the course of moisture expansion and shrinkage
of the wood.
For a hidden fixing, Spax recommends the stick system.
The individual elements will be attached on the reverse side
of the decking board which assures optimum ventilation.
The optimised Wirox surface fully satisfy the requirements for
Class T2/C2nw of the future standard EN 14592.
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AUGUST / SEPTEMBER 2019 //
In addition to decking, Spax also has products for floorboards
and wainscoting on ceilings. For windows installations, the
Spax frame anchor is the suitable product for this application.
For other timber related jobs, such as the assembling of
furniture and medium-density fibreboards (MDF) MDF, there
is a specific Spax product that will meet the requirements for
the applications.
Every day, millions of Spax screws are used by
professionals in timber construction and interior applications
— for floors, ceilings, in kitchens and bathrooms, at façades
or in gardens – everywhere wood is used.
NEW WASHER HEAD FORM
Recently, the developers of Spax screws focused on the
countersunk shank screw. These screws are used when two
components get pulled together until they reach full tension.
A flat washer head was developed and is now available on
the market.
A flat washer head form allows a flush countersunk
without the screw pulling too far into the material. At the
same time, the new screwhead has the capacity for additional
transmission. The shank was customised to suit the most
common width sizes of wood. The partial thread is optimised
to carry the higher load bearing capacity of the washer head.
The form of the screw has all the typical Spax features: The
T-Star drive and 4CUT point. The improvements allow for a
better application of smaller thread diameters, for example a
5mm thread diameter instead of a 6mm.
Spax has made its mark in the timber industry with its
impressive product offering. The combination of innovation
and technology in the development of the corrosion resistant
Wirox coating make Spax screws stand out in the market,
giving them a competitive edge.
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