Number and Form of Section. Distance of Neutral axis M.....N from extreme fibres. Area. a. Square of Radius of Gyration.ρ2 d/2 d4/12 d3/6 d2 d2 /12 d/2 bd3/12 bd2/6 bd d2/12 d/2 d4-d,4/12 d4-d14/6d d2-d12 d2+d12/12 d/2 bd3-b1d13/12 bd3-b1d13/6d bd-b1d1 (bd3-b1d13)/12(bd-b1d1) r 11/14r4 11/14 r3 22/7r2 r2/4 r 11/14(r4-r14) 11/14 (r4-r14)/r . 22/7(r2-r12) r2+r12/4
 Square of Radius of Gyration.ρ2 (bd2-b1d13)/12(bd-b1d1) 1/12.(bd3-b1d13-b11d113-b111d1113-)/bd-b1d1-b11d11-b111d111 Area. a. bd-b1d1 (bd-b1d1-b11d11-b111d111 Moment of Resistance. r. (bd3-b1d13)/6d (bd3-b1d13b11d113-b111d1113)/6d Moment of Inertia i. (bd3-b1d13)/12 1/12(bd3-b1d13-b11d113-b111d1113) Distance of Neufrom extreme fibres. d/2 d/2 Number and Form of Section. {
 Square of Radius of Gyration.ρ2 [d3(b-b1)+b1(d-d1)3]/12{d(b-b1)+b1(d-d1)} Area. a. bd-b1d1-b11d11-b111d111-z(d-d11)-z(b111+b1111) d(b-b1)+b1(d-d1) Moment of Resistance. r. [d3(b-b1)+b1(d-d1)3]/6d Moment of Inertia i. [d2(b-b1)+b1(d-d1)3]/12 Distance of Neutral axis M....N from extreme fibres. d/2 d/2 Number and Form of Section.
 Square of Radius of Gyration. (d3-d3)/12(d-d1) d2/12 Area. a. bd-(b1+bv)d1 -b11d11-b111d111-z(d-d11)-z(b111+b1111) b(d-d1) d(b-b1) Moment of Resist-anee. r. b/6d (d3-d13) d2/6(b-b1) Moment of Inertia i. b/12(d3-d13) d3/12(b-b1) Distance of Neutral axis M...N from extreme fibres. d/2 d/2 d/2 Number and Form of Section.
 Square of Radius of Gyration.ρ2 [b1x3+by3-(y-d)3.(b-b1)]/3(bd+b1d1) Area. a. bd+b1d1 Moment of Resistance, r. Lower Fibres.[b1x3-by3-(y-d)3.(b-b1)]/3y Upper Fibres.[b1x3+by3-(y-d)3.(b-b1)]/3x Moment of Inertia i. [b1x3+by3-(y-d)3.(b-b1)]/3 Distance of Neutral axis M...N from extreme fibres. Lower Fibres y =[bd2/2+b1d1(d+d1/2)]/bd+b1d1 Upper Fibers.x = [(b1d12)/2+bd(d1+d/2)]/bd+b2d1 x+y should be=d+d1 and x: y=c: t, where c= ultimate resistance to compression, t= ultimate resistance to tension, per square inch. Number and Form of Section.
 Square of Radius of Gyration. [b1x3+b11{(x3-d1)3}+by3-(b-d).(y-d)3]3(bd+b1d1+b11d11) Area. a. bd+bd1+b11d11 Moment of Resistance, r. Lower Fibres. [b1x+b11 { x3-(x-d1)3 } +by3-(b-b1).(y-d)3]/3y Upper Fibres.[b1d3+b1{x3-(x-d11)3}+by3(b-b1).(y-d)3 ]/3x Moment of Inertia i. [b1x2+b11{x3-(x-d11)} +by3-(b-bl).(y-d)3]/3 Distance of Neutral axis M.......N from extreme fibres. Lower Fibres.y =[ bd2/2+b1d1(d+d1/2)+b11d11(d+d1-d11/2]/bd+b1d1+b11d11 Upper Fibres.x = [b11d112+b1 d12/2+bd(d1+d/2)]bd+b1d1+b11d11 where x+y = d+d1 and x:y c:t Number and Form of Section.
 Square of Radius of Gyration.ρ2 [(b-z)d3-(b1-z)d13-b11d113]/12{(b-z)d-(bl-z)d1-b11d11} [(b-b1) {d3-d1113+(d111-z)3 } +b1d13-b11d113]/12(b-b1)(d-z)+b1d1-b11d11 [b(d3-d13)+b1(d113-d13)]/12{b(d-d1)+b1(d11-d1)} Area. a. (b-z)d-(b1-z)d1 - b11d11 (b-b1)(d-z)+b1d1-b11d11 b(d-d1)+b1(d11-d1) Moment of Resistance, r. [(b-z)d3-(b1-z)d13-b11dl3]/6d [(b-b) { d3-d1113+(d111-z)3 } +b1d13-b11d11]3/6d [b(d3-d13)+b1(d113-d13)]/6d Moment of Inertia i. [(b-x)a3-(b-z)d13-bI1d1113]/12 [(b-b1) { d3-d1113+(d111-z)3 }+b1d13-b11d113]/12 [b(d3-d13)+b1(d113-d13)]/12 Distance of Neutral axis M.....N from extreme fibres. d/2 d/2 d/2 Number and Form of Section. •
 Square of Radius of Glyration.ρ2 (bd3+b1d13)/12(bd+b1d1) [bd3-b1(d13-d113)]/12(bd-b1(d1-d11)-zd11) d2/ 3 d2/3 d2/6 d2/2 d2/18 Area. a. bd+b1d1 bd-bI(dl-d11)-zd11 bd d2 bd/2 bd/2 bd/2 Moment of Resistance, r. (bd3+b1d13)/6d [bd2-b1(d13-d113)-zd113]/6d bd2/3 d3/3 bd2/12 bd2/4 Lower Fibres.bd2/12 Upper Fibres.bd2/24 Moment of Inertia i. (bd3+b1d13)/12 [bd3-b1(d13-d113)-zd113]/12 bd3/3 d4/3 bd3/12 bd3/4 3bd3/36 Distance of Neutral axis M......N from extreme fibres. d/2 d/2 d d d d Lower Fibres.d/3 UpperFibres. 2/3d Number and Form of Section.
 Square of Radius of Gyration. ρ2 b2\12 (7d4-66r4)/12(7d2-22r2) (66r4-7d4)/12(22r2-7d2) 7/30[{3(94-941)+5h(bh1+d3-93)-5h{d13-(d1-z)3-zh1}]/11(92-912)+28h(b-z) Area. a. b2 d2-22/7r2 22/7r2-d2 11/14(92-912)+2h(b-z) Moment of Resistance, r. 0.1179 b3 d3/6-11/7dr4 11/14r3-d4/12r (94-914)/10d+[h(bh1+d3-93)]/6d - h{d3-(d1-z)3-zh1}]/6d Moment of Inertia i. b4/12 d4/12-11/14r4 11/14r4-d4/12 (9-94)/20 +[h(bh1+d3-9)]/12 - [h{d1-z)3-zh1}]/12 Distance of Neutral axis M.....N from extreme fibres. d/2 r d/2 Number and Form ofSection.
 Number and Form of Section. Distance of Neutral axis M-----N from extreme fi bres. Moment of Inertia i. Momenl of Resist ance. r. Area. a. Square of Radius of Gyration.ρ2 d/2 11/24 bd3 11/112 bd2 11/14 bd d2/16 d/2 11/224 (bd8-b1d13) 11/112d (bd3-b1d13) 11/14 (bd-b1d1) bd3-b1d13/16(bd-b1d1) 4/15 dbh