Structural Lumber - Section Sizes

Basic size, area, moments of inertia and section modulus for timber - metric units.

timber lumber metric sizes

Structural Lumber - Section Sizes and Physical Properties
Size	Area	Section Modulus		Area Moment of Inertia		Radius of Gyration
Size	Area	S_xx	S_yy	I_xx	I_yy	r_xx	r_yy
(mm x mm)	(10² mm²)	(10³ mm³)	(10³ mm³)	(10⁶ mm⁴)	(10⁶ mm⁴)	(mm)	(mm)
100 x 38	38	63.3	24.1	3.17	0.46	28.9	11.0
100 x 50	50	83.3	41.7	4.17	1.04	28.9	14.4
100 x 63	63	105	66.2	5.25	2.08	28.9	18.2
100 x 75	75	125	93.8	6.25	3.52	28.9	21.7
100 x 100	100	167	167	8.33	8.33	28.9	28.9

150 x 38	57	143	36.1	10.7	0.69	43.3	11.0
150 x 50	75	188	62.5	14.1	1.56	43.3	14.4
150 x 63	94	236	99.2	17.7	3.13	43.3	18.2
150 x 75	112	281	141	21.1	5.27	43.3	21.7
150 x 100	150	375	250	28.1	12.5	43.3	28.9
150 x 150	225	563	563	42.2	42.2	43.3	43.3

175 x 38	66	194	42.1	17.0	0.80	50.5	11.0
175 x 50	87	255	72.9	22.3	1.82	50.5	14.4
175 x 63	110	322	116	28.1	3.65	50.5	18.2
175 x 75	131	383	164	33.5	6.15	50.5	21.7

200 x 38	76	253	48.1	25.3	0.91	57.7	11.0
200 x 50	100	333	83.3	33.3	2.08	57.7	14.4
200 x 63	126	420	132	42.0	4.17	57.7	18.2
200 x 75	150	500	188	50.0	7.03	57.7	21.7
200 x 100	200	667	333	66.7	16.7	57.7	28.9
200 x 150	300	1000	750	100	56.3	57.7	43.3
200 x 200	400	1333	1333	133	133	57.7	57.7

225 x 38	85	321	54.2	36.1	1.03	65.0	11.0
225 x 50	112	422	93.8	47.5	2.34	65.0	14.4
225 x 63	141	532	149	59.8	4.69	65.0	18.2
225 x 75	168	633	211	71.2	7.91	65.0	21.7

250 x 50	125	521	104	65.1	2.60	72.2	14.4
250 x 75	187	781	234	97.7	8.79	72.2	21.7
250 x 100	250	1042	417	130	20.8	72.2	28.9
250 x 250	625	2604	2604	326	326	72.2	72.2