Background information

Bankirai or Bangkirai is a tropical type of wood that has become more and more popular in recent years. But Bangkirai is only the common name in international trade - the woods themselves are either Yellow Balau, Red Balau or Merawan, sometimes Keruing and White Seraya. Despite the different names, these woods all have similar characteristics.

Features of Bankirai

Bankirai is particularly peculiar in its hardness - it is about 50 percent harder than oak, one of the hardest domestic timbers. In addition, Bankirai is by nature practically completely weatherproof, but it can darken slightly over time. It tends - like all natural woods - with time to graying, but this can be prevented by oiling the wood at regular intervals.

When building a wooden terrace from Bankirai, there are a few things to keep in mind - sometimes beams and boards in the head area are treated with wax to prevent cracks and therefore sometimes need to be re-cut. In addition, over time may discolor possibly coloring materials, the surrounding should be protected. In order to avoid blackening, only stainless steel angles and screws should be used with Bangkirai - galvanized metals will cause black spots on the wood.

Basic terrace construction of a Bankirai terrace

A Bankirai terrace can be constructed like any other wooden terrace - on a stable base and a substructure, which is best also made of Bankirai beams. In the case of a foundation, the concrete blocks can be a few centimeters further apart, since the wood is very hard and therefore resistant to bending.

Step by step instructions for the Bankirai terrace


  • Concrete
  • Concrete slabs
  • Plastic base - if desired
  • Frame scantlings
  • Decks made of Bankirai
  • Side panels made of Bankirai
  • Stainless steel screws
  • on request Clips for fixing the boards without drill holes
  • Stainless steel structure (non-galvanized)
  • Cordless screwdriver
  • Drilling machine
  • Tape measure
  • Spirit level
  • Suitable jigsaw, chop saw or other suitable saw tool
  • Ev. Hammer for attachment of the structure
  • Rubber hammer
  • Vibratory plate
  • 1. Production of a stable substructure

If If there is no load-bearing foundation made of screed or concrete, you must first create a suitable load-bearing substructure. How to do that, you can read in detail here. Aus 2. Laying out the structure

Now place the squared timbers on the concrete blocks across the desired laying direction of the decking, check the construction and make a one-percent slope that leads away from the house. If you also want to bolt the Bankirai beams to the concrete blocks, you should first pre-drill them as Bankirai is very hard. Befest 3. Fastening the decking

The decking can be fixed either by screwing or by mounting clips to the structure. Remember to always pre-drill before fixing, because the hardness of the wood on the decking boards as well as on the sub-beams makes screwing in often difficult. Ver 4. Blending the sides

The side panels screw them to the end of the substructure. Remember to drill ahead as well.

Tips & TricksBe careful to use as little sapwood as possible during construction - it is much more sensitive to moisture and pest infestation than the more resilient heartwood. They recognize sapwood most - not always - in its slightly lighter color. Be aware that there are very few valid certificates for Bankirai - so you can not be sure that you are not using wood from illegal logging in the rainforest.

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