441. What is the minimum thickness of plain adobe masonry walls in one-story buildings?
442. The back portion of a masonry fireplace shall be separated from combustibles by?
443. Masonry fireplaces constructed as part of a masonry wall shall be separated from combustibles to the inside face of the nearest firebox lining by?
444. Chimneys shall not terminate under 2’ within how far of any point on the building?
445. A chimney shall not be less than how far above the building where it comes through the roof?
446. A chimney shall have an airspace clearance to combustibles a minimum of how far?
447. In lieu of a grade mark on lumber, a building official can accept?
448. Wood structural panels shall conform to?
449. Particleboard shall conform to?
450. Particleboard underlayment shall conform to?