Ulin

Ulin (Eusideroxylon Zwageri) Or Also Known As Bulian Or Ironwood Is A Woody Tree And Is A Typical Plant Of Southeast Asia Including Indonesia (Sumatra & Kalimantan), Malaysia (Sabah & Sarawak), Philippines (Sulu Islands). Ulin Is Classified Into The Lauraceae Tribe. Ulin Has A Typical Tree Height Of 30-35 M, Diameter At Breast Height (dbh) 60-120 Cm. The Straight Trunk Is Granular, The Crown Is Round And Tight And Has Horizontal Branching.

There Are 4 (four) Varieties Of Ulin In West Kalimantan Which Are Distinguished Based On The Use And Color Of The Trunk, Namely:

  1. ulin Tando With Reddish Brown Stem Color
  2. ulin Lilin With Dark Brown Stem
  3. ulin Tembaga With Yellowish Stem Color
  4. ulin Kapur With Light Brown Stem Color.

Ulin Tando, Lilin And Tembaga Are Usually Used For Building Foundations And Floors. Ulin Kapur Is The Only Ulin That Is Easy To Split, Making It Suitable For Roof Shingles.

Ulin Is A Large Tree That Can Reach 50 M In Height With A Diameter Of Up To 120 Cm. This Tree Grows In The Lowlands Up To 400 M Altitude.

Ulin Generally Grows At An Altitude Of 5 - 400 M Above Sea Level With Flat To Sloping Terrain, Growing Scattered Or Clustered In Mixed Forests But Very Rarely Found In Swamp Habitats Ulin Wood Is Also Resistant To Changes In Temperature, Humidity, And The Influence Of Sea Water So That The Nature Of The Wood Is Very Heavy And Hard.