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FLT – Flat Section

FLT - Flat Section

FLT – Flat Sections are used anywhere where a connection between two beams is required. They are used for base plates, end plates, stiffeners, gussets, tabs, splice plates and many more. In some cases, they add strength to a beam when welded along the length of a beam (top or bottom). Flat Sections are described by their width and thickness, eg. 200 x 12 Flat (both in mm). When a flat section is cut into smaller pieces, then they are called “plates”. Sometimes Flat Sections are used to reinforce timber joists (“flitch beam”) by bolting it to the joist every 400 – 600 mm.

What is a FLT - Flat Section?

Watch our insightful video explaining what a FLT - Flat Section is!

FLT - Flat Section(s) Profiles / Grades

FLT – Flat Section
Type		 Weight
[kg/m]		 Width
[mm]		 Thickness
[mm]
40 x 3 flat 0.9 40 3
40 x 5 flat 1.6 40 5
40 x 6 flat 1.9 40 6
40 x 8 flat 2.5 40 8
40 x 10 flat 3.1 40 10
40 x 12 flat 3.8 40 12
40 x 15 flat 4.7 40 15
40 x 20 flat 6.3 40 20
40 x 25 flat 7.9 40 25
40 x 30 flat 9.4 40 30
45 x 3 flat 1.1 45 3
45 x 5 flat 1.8 45 5
45 x 6 flat 2.1 45 6
45 x 8 flat 2.8 45 8
45 x 10 flat 3.5 45 10
45 x 12 flat 4.2 45 12
45 x 15 flat 5.3 45 15
45 x 20 flat 7.1 45 20
45 x 25 flat 8.8 45 25
50 x 3 flat 1.2 50 3
50 x 5 flat 2.0 50 5
50 x 6 flat 2.4 50 6
50 x 8 flat 3.1 50 8
50 x 10 flat 3.9 50 10
50 x 12 flat 4.7 50 12
50 x 15 flat 5.9 50 15
50 x 20 flat 7.9 50 20
50 x 25 flat 9.8 50 25
50 x 30 flat 11.8 50 30
50 x 40 flat 15.7 50 40
60 x 5 flat 2.4 60 5
60 x 6 flat 2.8 60 6
60 x 8 flat 3.8 60 8
60 x 10 flat 4.7 60 10
60 x 12 flat 5.7 60 12
60 x 15 flat 7.1 60 15
60 x 20 flat 9.4 60 20
60 x 25 flat 11.8 60 25
60 x 30 flat 14.1 60 30
65 x 5 flat 2.6 65 5
65 x 6 flat 3.1 65 6
65 x 8 flat 4.1 65 8
65 x 10 flat 5.1 65 10
65 x 12 flat 6.1 65 12
65 x 15 flat 7.7 65 15
65 x 20 flat 10.2 65 20
65 x 25 flat 12.8 65 25
65 x 40 flat 20.4 65 40
65 x 50 flat 25.5 65 50
70 x 6 flat 3.3 70 6
70 x 8 flat 4.4 70 8
70 x 10 flat 5.5 70 10
70 x 12 flat 6.6 70 12
70 x 15 flat 8.2 70 15
70 x 20 flat 11.0 70 20
70 x 25 flat 13.7 70 25
70 x 30 flat 16.5 70 30
70 x 40 flat 22.0 70 40
75 x 6 flat 3.5 75 6
75 x 8 flat 4.7 75 8
75 x 10 flat 5.9 75 10
75 x 12 flat 7.1 75 12
75 x 15 flat 8.8 75 15
75 x 20 flat 11.8 75 20
75 x 25 flat 14.7 75 25
80 x 3 flat 1.9 80 3
80 x 5 flat 3.1 80 5
80 x 6 flat 3.8 80 6
80 x 8 flat 5.0 80 8
80 x 10 flat 6.3 80 10
80 x 12 flat 7.5 80 12
80 x 15 flat 9.4 80 15
80 x 20 flat 12.6 80 20
80 x 25 flat 15.7 80 25
80 x 30 flat 18.8 80 30
80 x 50 flat 31.4 80 50
90 x 5 flat 3.5 90 5
90 x 6 flat 4.2 90 6
90 x 8 flat 5.7 90 8
90 x 10 flat 7.1 90 10
90 x 12 flat 8.5 90 12
90 x 15 flat 10.6 90 15
90 x 20 flat 14.1 90 20
90 x 25 flat 17.7 90 25
90 x 30 flat 21.2 90 30
100 x 3 flat 2.4 100 3
100 x 5 flat 3.9 100 5
100 x 6 flat 4.7 100 6
100 x 8 flat 6.3 100 8
100 x 10 flat 7.9 100 10
100 x 12 flat 9.4 100 12
100 x 15 flat 11.8 100 15
100 x 20 flat 15.7 100 20
100 x 25 flat 19.6 100 25
100 x 30 flat 23.6 100 30
100 x 40 flat 31.4 100 40
100 x 50 flat 39.3 100 50
110 x 6 flat 5.2 110 6
110 x 8 flat 6.9 110 8
110 x 10 flat 8.6 110 10
110 x 12 flat 10.4 110 12
110 x 15 flat 13.0 110 15
110 x 20 flat 17.3 110 20
110 x 25 flat 21.6 110 25
120 x 6 flat 5.7 120 6
120 x 8 flat 7.5 120 8
120 x 10 flat 9.4 120 10
120 x 12 flat 11.3 120 12
120 x 15 flat 14.1 120 15
120 x 20 flat 18.8 120 20
120 x 25 flat 23.6 120 25
130 x 5 flat 5.1 130 5
130 x 6 flat 6.1 130 6
130 x 8 flat 8.2 130 8
130 x 10 flat 10.2 130 10
130 x 12 flat 12.3 130 12
130 x 15 flat 15.3 130 15
130 x 20 flat 20.4 130 20
130 x 25 flat 25.5 130 25
130 x 30 flat 30.6 130 30
140 x 6 flat 6.6 140 6
140 x 12 flat 13.2 140 12
140 x 15 flat 16.5 140 15
140 x 25 flat 27.5 140 25
150 x 5 flat 5.9 150 5
150 x 6 flat 7.1 150 6
150 x 8 flat 9.4 150 8
150 x 10 flat 11.8 150 10
150 x 12 flat 14.1 150 12
150 x 15 flat 17.7 150 15
150 x 20 flat 23.6 150 20
150 x 25 flat 29.4 150 25
150 x 30 flat 35.3 150 30
150 x 40 flat 47.1 150 40
180 x 6 flat 8.5 180 6
180 x 8 flat 11.3 180 8
180 x 10 flat 14.1 180 10
180 x 12 flat 17.0 180 12
180 x 15 flat 21.2 180 15
180 x 20 flat 28.3 180 20
180 x 25 flat 35.3 180 25
200 x 6 flat 9.4 200 6
200 x 8 flat 12.6 200 8
200 x 10 flat 15.7 200 10
200 x 12 flat 18.8 200 12
200 x 15 flat 23.6 200 15
200 x 20 flat 31.4 200 20
200 x 25 flat 39.3 200 25
220 x 5 flat 8.6 220 5
220 x 6 flat 10.4 220 6
220 x 8 flat 13.8 220 8
220 x 10 flat 17.3 220 10
220 x 12 flat 20.7 220 12
220 x 15 flat 25.9 220 15
220 x 20 flat 34.5 220 20
220 x 25 flat 43.2 220 25
230 x 10 flat 18.1 230 10
230 x 15 flat 27.1 230 15
230 x 20 flat 36.1 230 20
230 x 25 flat 45.1 230 25
250 x 6 flat 11.8 250 6
250 x 8 flat 15.7 250 8
250 x 10 flat 19.6 250 10
250 x 12 flat 23.6 250 12
250 x 15 flat 29.4 250 15
250 x 20 flat 39.3 250 20
250 x 25 flat 49.1 250 25
300 x 6 flat 14.1 300 6
300 x 8 flat 18.8 300 8
300 x 10 flat 23.6 300 10
300 x 12 flat 28.3 300 12
300 x 15 flat 35.3 300 15
300 x 20 flat 47.1 300 20
300 x 25 flat 58.9 300 25
350 x 10 flat 27.5 350 10
350 x 12 flat 33.0 350 12
350 x 15 flat 41.2 350 15
350 x 20 flat 55.0 350 20
350 x 25 flat 68.7 350 25
400 x 10 flat 31.4 400 10
400 x 12 flat 37.7 400 12
400 x 15 flat 47.1 400 15
400 x 20 flat 62.8 400 20
400 x 25 flat 78.5 400 25
450 x 20 flat 70.7 450 20
450 x 25 flat 88.3 450 25

Find out more

Learn more about FLT – Flat Section’s and more, from our ‘Ask an Engineer’ series on Youtube

Or check our ‘Ask an Engineer’ page here