(1)
Header joists around floor openings shall be doubled when they exceed 1.2 m in length.
(2)
The size of header joists exceeding 3.2 m in length shall be determined by calculations.
Header joists around floor openings shall be doubled when they exceed 1.2 m in length.
The size of header joists exceeding 3.2 m in length shall be determined by calculations.