ISO hull thickness

[dimr]

I am studying hull bottom thickness with the regulation of iso 12215 -5 C.1
FRP laminate single skin

i found out Pbm Base :45,2 kN / m2 ..?
Pbm :33,36 kN / m2...?
t1 : 5.2 mm
1. question : Is this minimum 5.2 mm thickness of bottom (Chopped strand mat +viny lester +catalizer ) a CORRECT approach for a 7.5 m fiberglass boat?

2. question : how many layers of chopped strand mat should i use for bottom ?

450g (1.5 oz) Chopped Strand Matting +2.5 kg of Resin will “wet out” 1kg of Chopped Strand Matting
Property Description
Glass Type E
Binder Type Emulsion
Filament Diameter micron : 11
Coupling Agent Silane
Mat Density g/m² 450 & 600
Mat Width m 0.95, 1.27 & 1.37

Displacement kg 2040
Heel to Starboard degrees 0
Draft at FP mm 0,44
Draft at AP mm 0,44
Draft at LCF mm 0,44
Trim (+ve by stern) mm 0
WL Length mm 7,198
WL Beam mm 2,233
Wetted Area mm^2 16,9
Waterpl. Area mm^2 12,174
Prismatic Coeff. 0,765
Block Coeff. 0,282
Midship Area Coeff. 0,552
Waterpl. Area Coeff. 0,758
LCB from Amidsh. (+ve fwd) mm 3,124
LCF from Amidsh. (+ve fwd) mm 2,908
KB mm 0,322
KG mm 0,46
BMt mm 1,863
BML mm 21,176
GMt mm 1,725
GML mm 21,037
KMt mm 2,185
KML mm 21,497
Immersion (TPc) tonne/cm 0,125
MTc tonne.m 0
RM at 1deg = GMt.Disp.sin(1) kg.mm 61,406
Max deck inclination deg 0
Trim angle (+ve by stern) deg 0

[dimr]

thanks for all replies...