Suggestions for improvement of allowable nailing stress according for wood: more diverse nail types need to be considered, especially the types most widely used in the field; different fiber directional properties must be differentiated also, future studies need to integrate much required design factors, for example by including the wood temperature/humidity into the integrated modulus, as wood is very sensitive to changes of moisture in the air.

• 박철우(이즈원산업 부설연구소장) | Park, Cheul Woo 교신저자
• 임남기(동명대학교 건축공학과) | Lim, Nam Gi