FLT Steel – Flat Section

FLT steel 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 steel 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.

FLT Steel (Size & Weight Chart)

	FLT – Flat Section Type	Weight [kg/m]	Width [mm]	Thickness [mm]
01	40 x 3 flat	0.9	40	3
02	40 x 5 flat	1.6	40	5
03	40 x 6 flat	1.9	40	6
04	40 x 8 flat	2.5	40	8
05	40 x 10 flat	3.1	40	10
06	40 x 12 flat	3.8	40	12
07	40 x 15 flat	4.7	40	15
08	40 x 20 flat	6.3	40	20
09	40 x 25 flat	7.9	40	25
10	40 x 30 flat	9.4	40	30
11	45 x 3 flat	1.1	45	3
12	45 x 5 flat	1.8	45	5
13	45 x 6 flat	2.1	45	6
14	45 x 8 flat	2.8	45	8
15	45 x 10 flat	3.5	45	10
16	45 x 12 flat	4.2	45	12
17	45 x 15 flat	5.3	45	15
18	45 x 20 flat	7.1	45	20
19	45 x 25 flat	8.8	45	25
20	50 x 3 flat	1.2	50	3
21	50 x 5 flat	2.0	50	5
22	50 x 6 flat	2.4	50	6
23	50 x 8 flat	3.1	50	8
24	50 x 10 flat	3.9	50	10
25	50 x 12 flat	4.7	50	12
26	50 x 15 flat	5.9	50	15
27	50 x 20 flat	7.9	50	20
28	50 x 25 flat	9.8	50	25
29	50 x 30 flat	11.8	50	30
30	50 x 40 flat	15.7	50	40
31	60 x 5 flat	2.4	60	5
32	60 x 6 flat	2.8	60	6
33	60 x 8 flat	3.8	60	8
34	60 x 10 flat	4.7	60	10
35	60 x 12 flat	5.7	60	12
36	60 x 15 flat	7.1	60	15
37	60 x 20 flat	9.4	60	20
38	60 x 25 flat	11.8	60	25
39	60 x 30 flat	14.1	60	30
40	65 x 5 flat	2.6	65	5
41	65 x 6 flat	3.1	65	6
42	65 x 8 flat	4.1	65	8
43	65 x 10 flat	5.1	65	10
44	65 x 12 flat	6.1	65	12
45	65 x 15 flat	7.7	65	15
46	65 x 20 flat	10.2	65	20
47	65 x 25 flat	12.8	65	25
48	65 x 40 flat	20.4	65	40
49	65 x 50 flat	25.5	65	50
50	70 x 6 flat	3.3	70	6
51	70 x 8 flat	4.4	70	8
52	70 x 10 flat	5.5	70	10
53	70 x 12 flat	6.6	70	12
54	70 x 15 flat	8.2	70	15
55	70 x 20 flat	11.0	70	20
56	70 x 25 flat	13.7	70	25
57	70 x 30 flat	16.5	70	30
58	70 x 40 flat	22.0	70	40
59	75 x 6 flat	3.5	75	6
60	75 x 8 flat	4.7	75	8
61	75 x 10 flat	5.9	75	10
62	75 x 12 flat	7.1	75	12
63	75 x 15 flat	8.8	75	15
64	75 x 20 flat	11.8	75	20
65	75 x 25 flat	14.7	75	25
66	80 x 3 flat	1.9	80	3
67	80 x 5 flat	3.1	80	5
68	80 x 6 flat	3.8	80	6
69	80 x 8 flat	5.0	80	8
70	80 x 10 flat	6.3	80	10
71	80 x 12 flat	7.5	80	12
72	80 x 15 flat	9.4	80	15
73	80 x 20 flat	12.6	80	20
74	80 x 25 flat	15.7	80	25
75	80 x 30 flat	18.8	80	30
76	80 x 50 flat	31.4	80	50
77	90 x 5 flat	3.5	90	5
78	90 x 6 flat	4.2	90	6
79	90 x 8 flat	5.7	90	8
80	90 x 10 flat	7.1	90	10
81	90 x 12 flat	8.5	90	12
82	90 x 15 flat	10.6	90	15
83	90 x 20 flat	14.1	90	20
84	90 x 25 flat	17.7	90	25
85	90 x 30 flat	21.2	90	30
86	100 x 3 flat	2.4	100	3
87	100 x 5 flat	3.9	100	5
88	100 x 6 flat	4.7	100	6
89	100 x 8 flat	6.3	100	8
90	100 x 10 flat	7.9	100	10
91	100 x 12 flat	9.4	100	12
92	100 x 15 flat	11.8	100	15
93	100 x 20 flat	15.7	100	20
94	100 x 25 flat	19.6	100	25
95	100 x 30 flat	23.6	100	30
96	100 x 40 flat	31.4	100	40
97	100 x 50 flat	39.3	100	50
98	110 x 6 flat	5.2	110	6
99	110 x 8 flat	6.9	110	8
100	110 x 10 flat	8.6	110	10
101	110 x 12 flat	10.4	110	12
102	110 x 15 flat	13.0	110	15
103	110 x 20 flat	17.3	110	20
104	110 x 25 flat	21.6	110	25
105	120 x 6 flat	5.7	120	6
106	120 x 8 flat	7.5	120	8
107	120 x 10 flat	9.4	120	10
108	120 x 12 flat	11.3	120	12
109	120 x 15 flat	14.1	120	15
110	120 x 20 flat	18.8	120	20
111	120 x 25 flat	23.6	120	25
112	130 x 5 flat	5.1	130	5
113	130 x 6 flat	6.1	130	6
114	130 x 8 flat	8.2	130	8
115	130 x 10 flat	10.2	130	10
116	130 x 12 flat	12.3	130	12
117	130 x 15 flat	15.3	130	15
118	130 x 20 flat	20.4	130	20
119	130 x 25 flat	25.5	130	25
120	130 x 30 flat	30.6	130	30
121	140 x 6 flat	6.6	140	6
122	140 x 12 flat	13.2	140	12
123	140 x 15 flat	16.5	140	15
124	140 x 25 flat	27.5	140	25
125	150 x 5 flat	5.9	150	5
126	150 x 6 flat	7.1	150	6
127	150 x 8 flat	9.4	150	8
128	150 x 10 flat	11.8	150	10
129	150 x 12 flat	14.1	150	12
130	150 x 15 flat	17.7	150	15
131	150 x 20 flat	23.6	150	20
132	150 x 25 flat	29.4	150	25
133	150 x 30 flat	35.3	150	30
134	150 x 40 flat	47.1	150	40
135	180 x 6 flat	8.5	180	6
136	180 x 8 flat	11.3	180	8
137	180 x 10 flat	14.1	180	10
138	180 x 12 flat	17.0	180	12
139	180 x 15 flat	21.2	180	15
140	180 x 20 flat	28.3	180	20
141	180 x 25 flat	35.3	180	25
142	200 x 6 flat	9.4	200	6
143	200 x 8 flat	12.6	200	8
144	200 x 10 flat	15.7	200	10
145	200 x 12 flat	18.8	200	12
146	200 x 15 flat	23.6	200	15
147	200 x 20 flat	31.4	200	20
148	200 x 25 flat	39.3	200	25
149	220 x 5 flat	8.6	220	5
150	220 x 6 flat	10.4	220	6
151	220 x 8 flat	13.8	220	8
152	220 x 10 flat	17.3	220	10
153	220 x 12 flat	20.7	220	12
154	220 x 15 flat	25.9	220	15
155	220 x 20 flat	34.5	220	20
156	220 x 25 flat	43.2	220	25
157	230 x 10 flat	18.1	230	10
158	230 x 15 flat	27.1	230	15
159	230 x 20 flat	36.1	230	20
160	230 x 25 flat	45.1	230	25
161	250 x 6 flat	11.8	250	6
162	250 x 8 flat	15.7	250	8
163	250 x 10 flat	19.6	250	10
164	250 x 12 flat	23.6	250	12
165	250 x 15 flat	29.4	250	15
166	250 x 20 flat	39.3	250	20
167	250 x 25 flat	49.1	250	25
168	300 x 6 flat	14.1	300	6
169	300 x 8 flat	18.8	300	8
170	300 x 10 flat	23.6	300	10
171	300 x 12 flat	28.3	300	12
172	300 x 15 flat	35.3	300	15
173	300 x 20 flat	47.1	300	20
174	300 x 25 flat	58.9	300	25
175	350 x 10 flat	27.5	350	10
176	350 x 12 flat	33.0	350	12
177	350 x 15 flat	41.2	350	15
178	350 x 20 flat	55.0	350	20
179	350 x 25 flat	68.7	350	25
180	400 x 10 flat	31.4	400	10
181	400 x 12 flat	37.7	400	12
182	400 x 15 flat	47.1	400	15
183	400 x 20 flat	62.8	400	20
184	400 x 25 flat	78.5	400	25
185	450 x 20 flat	70.7	450	20
186	450 x 25 flat	88.3	450	25

Additional information

Weight	N/A
Dimensions	N/A
Type	40 x 3 flat, 40 x 5 flat, 40 x 6 flat, 40 x 8 flat, 40 x 10 flat, 40 x 12 flat, 40 x 15 flat, 40 x 20 flat, 40 x 25 flat, 40 x 30 flat, 45 x 3 flat, 45 x 5 flat, 45 x 6 flat, 45 x 8 flat, 45 x 10 flat, 45 x 12 flat, 45 x 15 flat, 45 x 20 flat, 45 x 25 flat, 50 x 3 flat

FLT Steel – Flat Section