Technical Booklet D Structure·Page 25·4B.4
Definition of strength classes and timber grades
Strength classes, species, grades and species combinations are as defined in BS 5268: Part 2.
Strength classes, species, grades and species combinations referred to in this Section are as defined in BS 5268: Part 2.
Source — /Users/richardhill/Documents/planning-arch-project/data/documents/regional/Technical Booklet D - Structure.pdf