A Fast Offshore Cruiser - Appendices.
A.6. - Plywood and laminate analysis.

Plywood and laminate properties of a 1m strip for deck and bulkheads.

Set-up	Ply	Teak	I (mm⁴)	E (N/mm²)	EI (Nmm²)	Z (mm³)
	Layer thickness (mm)		Transverse properties
A	6	***	18000	2438	44	6000
B	9	***	60750	2438	148	13500
C	12	***	142923	3249	464	23880
D	6+4	***	174793	3271	572	25801
E	6+9	6	885730	1436	1272	110740

	Layer thickness (mm)		Longitudinal properties
Set-up	Ply	Teak	I (mm⁴)	E (N/mm²)	EI (Nmm²)	Z (mm³)
A	6	***	18000	8309	150	6000
B	9	***	60750	8309	505	13500
C	12	***	142923	7498	1072	23880
D	6+4	***	84799	7285	618	14797
E	6+9	6	797220	8251	6578	65558

Solid wood E values relative to grain (N/mm²).

Wood	Longitudinal	Transverse
Teak	12400	413
Mahogany	10400	347

Longitudinal = with face grain

Transverse = perpendicular to face grain

Grain of all face layers are parallel, including teak.

All units are mm, mm³, mm⁴, N/mm² or MNmm².

Table of set-up mass per square meter.

Set-up	Ply	Teak	Kg/m²
A	6	***	2.52
B	9	***	3.78
C	12	***	5.03
D	6+4	***	4.20
E	6+9	6	10.08

Example of E & I calculation based upon set-up E transverse (main deck).

ply	t mm	d mm	E N/mm^2	Etd	Et
teak	6	3	413	7434	2478
1	1.80	6.60	347	2748	416.4
2	1.80	7.80	10400	97344	12480
3	1.80	9.00	347	3748	416.4
4	1.80	10.20	10400	127296	12480
5	1.80	11.40	347	4747	416.4
6	1.20	12.60	347	5247	416.4
7	1.20	13.80	10400	172224	12480
8	1.20	15.00	347	6246	416.4
9	1.20	16.20	10400	202176	12480
10	1.20	17.40	347	7245	416.4
totals	18			636455	54896.4

ply	A	Y	AY^2	Ig	Ina	EI Nmm^2
teak	6000	10.00	600210	18000	618210	255320547
1	1800	6.10	67016	486	67502	23423316
2	1800	4.30	33309	486	33795	351468373
3	1800	2.50	11266	486	11752	4077847
4	1800	0.70	886	486	1372	14273020
5	1800	-1.10	2171	486	2657	922010
6	1200	-2.30	6338	144	6482	2249381
7	1200	-3.50	14685	144	14829	154225094
8	1200	-4.70	26488	144	26632	9241411
9	1200	-5.90	41747	144	41891	435669293
10	1200	-7.10	60462	144	60606	21030368
totals					885730	1271900661