Notes to Table 9.15.4.2.B.:
9.20.5.2. Lintels or Arches (1) Masonry over openings shall be supported by steel, reinforced concrete lintels or masonry arches designed to support the imposed loads. (2) Except as provided in Sentences (3) and (6), steel angle lintels supporting masonry above openings shall conform to Table 9.20.5.2.A. (3) Steel angle lintels supporting masonry veneer above openings shall conform to Table 9.20.5.2.B. (4) Steel lintels described in Sentences (2) and (3) shall, (a) have even and level bearing and shall have not less than 150 mm length of bearing at end supports, and (b) bear on masonry, concrete or steel. (5) Steel angle lintels supporting masonry shall be primed or painted or otherwise protected from corrosion. (6) Steel beams supporting masonry veneer and wood stud walls above openings shall conform to Table 9.20.5.2.C. (7) Steel beams described in Sentence (6) shall be supported at each end by a steel column, and have a minimum 6 mm plate welded to the flange to support the masonry veneer. Table 9.20.5.2.A.   Loose Steel Lintels for Masonry – No. & Size of Angles Required(6) (7) Forming Part of Sentence 9.20.5.2.(2) Item   Col. 1   Col. 2   Col. 3   Col. 4   Col. 5   Col. 6   Col. 7   Col. 8   Col. 9   Col. 10   Col. 11 

      Clear Span(1)(3)   Exterior Angles, mm   Wall Thickness, mm   Interior Angles, mm                 

      For Brick   For Stone   Maximum Floor Loads per Metre of Span in Newtons(2)(4)(5)     

          100 mm   100 mm + 50 mm stone facing 

                  None   3 650   7 300   10 950   14 600   18 250   21 900 

          No Floor Load     

  1.   1.2 m or less   L-89 × 89 × 6.4   L-127 × 89 × 7.9   203   L-89   L-89   L-89   L-102   L-127   L-127   L-127 

              × 89   × 89   × 89   × 89   × 89   × 89   × 89 

                      × 6.4   × 6.4   × 7.9   × 7.9   × 7.9   × 11   × 13 

                  305   2Ls-89   2Ls-89   2Ls-89   2Ls-89   2Ls-89   2Ls-102   2Ls-102 

                      × 89   × 89   × 89   × 89   × 89   × 89   × 89 

                      × 7.9   × 7.9   × 7.9   × 7.9   × 7.9   × 7.9   × 7.9 

  2.   1.5 m   L-89 × 89 × 7.9   L-127 × 89 × 7.9   203   L-89   L-89   L-127   L-127   L-127   L-152     

                  × 89   × 89   × 89   × 89   × 89   × 89     

                      × 7.9   × 7.9   × 7.9   × 11   × 13   × 11     

                  305   2Ls-89   2Ls-89   2Ls-89   2Ls-127   2Ls-127   2Ls-127   2Ls-127 

                      × 89   × 89   × 89   × 89   × 89   × 89   × 89 

                      × 7.9   × 7.9   × 7.9   × 7.9   × 7.9   × 7.9   × 11 

  3.   1.8 m   L-102 × 89 × 7.9   L-127 × 127 × 7.9   203   L-102   L-127   L-127   L-152             

              × 89   × 89   × 89   × 102             

                      × 7.9   × 7.9   × 7.9   × 11             

                  305   2Ls-102   2Ls-102   2Ls-127   2Ls-127   2Ls-127   2Ls-152   2Ls-152 

                      × 89   × 89   × 89   × 89   × 89   × 102   × 102 

                      × 7.9   × 7.9   × 7.9   × 7.9   × 11   × 11   × 11 

  4.   2.1 m   L-102 × 89 × 7.9   L-127 × 127 × 7.9   203   L-102   L-127   L-152                 

              × 89   × 89   × 102                 

                      × 7.9   × 11   × 11                 

                  305   2Ls-102   2Ls-127   2Ls-127   2Ls-152   2Ls-152         

                      × 89   × 89   × 89   × 102   × 102         

                      × 7.9   × 11   × 11   × 11   × 11         

  5.   2.4 m   L-127 × 89 × 7.9   L-127 × 127 × 7.9   203   L-127   L-152                     

              × 89   × 102                     

                      × 7.9   × 11                     

                  305   2Ls-127   2Ls-127   2Ls-152                 

                      × 89   × 89   × 102                 

                      × 7.9   × 13   × 11                 

  6.   2.7 m   L-127 × 89 × 11   L-127 × 127 × 11   203   L-127                         

              × 89                         

                      × 11                         

                  305   2Ls-127   2Ls-152                     

                      × 152   × 102                     

                      × 11   × 11                     

  7.   3.0 m   L-152 × 102 × 11   L-127 × 127 × 13   203   L-152                         

              × 102                         

                      × 11                         

                  305   2Ls-152                         

                      × 102                         

                      × 11