Table 2:
Mechanical properties of certain local and imported timbers (based on specimens at 12% moisture content)

Species Density
(Kg/m3)		 Modulus of rupture
(static bending)		 Modulus of Elasticity Maximum Crushing
strength in
compression parallel to grain		 Side-grain
hardness
(Janka test)
    1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
    Mean SD SE Mean SD SE Mean SD SE Mean SD SE Mean SD SE
2. Pinus elliottii 494 80 3 71 16.2 0.6 9264 2595 146 37.3 7.86 0.34 2938 846 35
1. Pinus patula 498 60 5 73 11.9 1.1 11042 2517 226 40.9 7.74 0.71 2776 727 70
5. Pinus pinaster 637 70 8 107 15.7 1.8 13806 2407 269 54.8 7.39 0.83 4291 1130 126
3. Pinus radiata 611 68 9 101 13.9 1.9 13721 2160 291 53.3 6.47 0.87 4170 997 134
4. Pinus taeda 578 94 9 91 20.1 2.0 11225 2997 300 50.7 1.64 1.16 3432 1065 107
6. Pinus sylvestris*                              
  (European Redwood
or Scots pine)		 513     89     10000     47.4     2980    
7. Hevea brasiliensis*                              
  (Rubber-wood) 640     66     9240     32.0     3039    

*Not grown in South Africa, but included for the sake of comparison

NOTE

(a)  Columns 4-12: MPa (Mega Pascal) = MN/M^2 (Mega Newton per square metre)
(b)  Columns 13-15: Force required to imbed a 0.44 inch (11.278mm) steel ball to its mid-diameter in the wood, expressed in Newton
(c)  S-Standard deviation
(d)  SE-Standard error mean
(e)  Values for species numbered 1 to 5 determined at the South African Forestry Research Institute, Pretoria
(f)  Values for species number 6 and 7 obtained from overseas literature