British Bulb Flats | Section Sizes

Shape	Area (mm²)	Depth (mm)	Width (mm)	Section Properties
Shape	Area (mm²)	Depth (mm)	Width (mm)	I_x (mm⁴)	I_y (mm⁴)	Plastic Mod Xp (mm³)	Plastic Mod Yp (mm³)
160x7 Dimensions	1458	160	7	-	-	-	-
160x8 Dimensions	1618	160	8	-	-	-	-
160x9 Dimensions	1778	160	9	-	-	-	-
160x10 Dimensions	1934	160	10	-	-	-	-
160x11 Dimensions	2094	160	11	-	-	-	-
160x11.5 Dimensions	2174	160	11.5	-	-	-	-
180x8 Dimensions	1883	180	8	-	-	-	-
180x9 Dimensions	2063	180	9	-	-	-	-
180x10 Dimensions	2240	180	10	-	-	-	-
180x11 Dimensions	2420	180	11	-	-	-	-
180x11.5 Dimensions	2510	180	11.5	-	-	-	-
200x8.5 Dimensions	2263	200	8.5	-	-	-	-
200x9 Dimensions	2363	200	9	-	-	-	-
200x10 Dimensions	2560	200	10	-	-	-	-
200x11 Dimensions	2760	200	11	-	-	-	-
200x11.5 Dimensions	2860	200	11.5	-	-	-	-
200x12 Dimensions	2960	200	12	-	-	-	-
220x9 Dimensions	2678	220	9	-	-	-	-
220x10 Dimensions	2894	220	10	-	-	-	-
220x11 Dimensions	3114	220	11	-	-	-	-
220x11.5 Dimensions	3224	220	11.5	-	-	-	-
220x12 Dimensions	3334	220	12	-	-	-	-
230x11 Dimensions	3297	230	11	-	-	-	-
240x9.5 Dimensions	3123	240	9.5	-	-	-	-
240x10 Dimensions	3243	240	10	-	-	-	-
240x10.5 Dimensions	3363	240	10.5	-	-	-	-
240x11 Dimensions	3483	240	11	-	-	-	-
240x11.5 Dimensions	3603	240	11.5	-	-	-	-
240x12 Dimensions	3723	240	12	-	-	-	-
260x10 Dimensions	3605	260	10	-	-	-	-
260x11 Dimensions	3865	260	11	-	-	-	-
260x12 Dimensions	4125	260	12	-	-	-	-
260x13 Dimensions	4385	260	13	-	-	-	-
280x10.5 Dimensions	4122	280	10.5	-	-	-	-
280x11 Dimensions	4262	280	11	-	-	-	-
280x12 Dimensions	4542	280	12	-	-	-	-
280x13 Dimensions	4822	280	13	-	-	-	-
300x11 Dimensions	4673	300	11	-	-	-	-
300x12 Dimensions	4973	300	12	-	-	-	-
300x13 Dimensions	5273	300	13	-	-	-	-
320x11.5 Dimensions	5259	320	11.5	-	-	-	-
320x12 Dimensions	5419	320	12	-	-	-	-
320x12.5 Dimensions	5579	320	12.5	-	-	-	-
320x13 Dimensions	5739	320	13	-	-	-	-
320x13.5 Dimensions	5894	320	13.5	-	-	-	-
320x14 Dimensions	6054	320	14	-	-	-	-
340x12 Dimensions	5878	340	12	-	-	-	-
340x12.5 Dimensions	6048	340	12.5	-	-	-	-
340x13 Dimensions	6218	340	13	-	-	-	-
340x14 Dimensions	6554	340	14	-	-	-	-
340x15 Dimensions	6894	340	15	-	-	-	-
370x12.5 Dimensions	6779	370	12.5	-	-	-	-
370x13 Dimensions	6964	370	13	-	-	-	-
370x14 Dimensions	7330	370	14	-	-	-	-
370x15 Dimensions	7700	370	15	-	-	-	-
370x16 Dimensions	8070	370	16	-	-	-	-
400x13 Dimensions	7743	400	13	-	-	-	-
400x14 Dimensions	8138	400	14	-	-	-	-
400x15 Dimensions	8538	400	15	-	-	-	-
400x16 Dimensions	8938	400	16	-	-	-	-
430x14 Dimensions	8978	430	14	-	-	-	-
430x15 Dimensions	9408	430	15	-	-	-	-
430x17 Dimensions	10268	430	17	-	-	-	-
430x18 Dimensions	10698	430	18	-	-	-	-
430x19 Dimensions	11128	430	19	-	-	-	-
430x20 Dimensions	11558	430	20	-	-	-	-

The above table of Bulb Flats sizes offers a detailed beam sizes chart for engineers to easily scroll and find what they’re looking for. If you’re looking for a different section or shape try the search feature or one of the below resources: