Brinellova lestvica

Trdota lesa po Brinellovi lestvici

Brinellova lestvica je določena s standardi ISO. Jekleno kroglo premera 10 mm z določeno

močjo (odvisna je od gostote in lahko zanša 100, 500 ali 1000 newtnov) 15 sekund

pritiskamo na površino izbranega lesa; 30 sekund jo pustimo na tem mestu in potem v roku

15 sekund odstranimo. Izmerimo površino odtisa.

Navedene trdote so le približne vrednosti. Dejanske se spreminjajo glede na območje rasti

dreves in načina rezanja (položaj letnic).

Po abecedi:                                                        Po trdoti:

Afromosia 3,8                                                    Smreka 1,3

Akacija 4,8                                                          Jelša 2,1

Badi 5,4                                                               Bor 2,2

Bambus 4,5                                                        Kostanj 2,3

Bagkirai 4,2                                                         Hruška 2,4

Bor 2,2                                                                 Macesen 2,5

Brest 3,9                                                              Breza 2,7

Breza 2,7                                                              Češnja 2,9

Bukev parjena 4,0                                               Mahagonij 3,0

Cabreuva 4,2                                                        Iroko 3,5

Češnja 2,9                                                             Oreh 3,5

Doussie 4,0                                                           Teak 3,5

Hrast 3,7                                                               Hrast 3,7

Hruška 2,4                                                            Javor evropski 3,7

Ipe Lapacho 5,8                                                   Afromosia 3,8

Iroko 3,5                                                                Jesen 3,8

Jatoba 4,4                                                              Padouk 3,8

Javor evropski 3,7                                                Brest 3,9

Javor kanadski 4,2                                                Bukev parjena 4,0

Jelša 2,1                                                                 Doussie 4,0

Jesen 3,8                                                                Merbau 4,0

Kempas 4,5                                                            Wenge 4,0

Kostanj 2,3                                                             Bangkirai 4,2

Macesen 2,5                                                          Cabreuva 4,2

Mahagonij 3,0                                                       Javor kanadski 4,2

Merbau 4,0                                                            Palisander 4,3

Mutenye 4,8                                                          Jatoba 4,4

Oljka 5,9                                                                 Bambus 4,5

Oreh 3,5                                                                 Kempas 4,5

Padouk 3,8                                                             Akacija 4,8

Palisander 4,3                                                        Mutenye 4,8

Smreka 1,3                                                              Badi 5,4

Teak 3,5                                                                   Ipe Lapacho 5,8

Wenge 4,0                                                               Oljka 5,9

Vir: https://www.valles.si/images/dokumenti/trdota_lesa.pdf