Evaluation of representativeness of elasticity modulus and apparent density of D20 strength class of Brazilian standard in timber structures design - Aquino, Vinicius Borges de Moura; Lahr, Francisco Antonio Rocco; Chahud, Eduardo; Rodrigues, Edson Fernando Castanheira; Arroyo, Felipe Nascimento; Christoforo, André Luis (Acta Scientiarum: Technology, 2024)