Planked Boats Fastenings

ALL FASTENINGS MUST BE HOT DIPPED GALVANIZED

Hot dipped galvanized fastenings have a dull grey and rough surface because of a thick zinc-coating. Electroplated fastenings which are also sold as" galvanized" have a shiny, smooth and silvery surface. The zinc coating is very thin and gives no protection in salt water. Always specify" hot dipped galvanized" not just "galvanized"

NAILS

If specially made boatnalls are available they are the best choice. Boatnails are square in section and are thick in relation to the length. In most developing countries these nails cannot be bought locally. Round wirenails are however widely available. Used for house construction they are thin In relation to the length. When used for boat building they must be cut down in length before galvanizing, or a special order made from the nail factory. Tests have shown that round wire nails are as strong as square nails provided the diometer is equivqlent. It is important that the head of the nail is large, about twice the diameter of the nail.

For the boats in this publication three sizes of nails are required. Predrilling must be done for all nails.

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BOAT NAIL

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ROUND WIRE NAIL

DIAMETER

LENGTH

PREDRILL

CUP - SQUARE COACH BOLT Lenath

CUP - SQUARE COACH BOLT Lenath

Minimum 2.5 mm for 8mm bolt 3 mm for 10 mm bolt

HEXAGONAL HEAD BOLT t_Length

Minimum 2.5 mm for 8mm bolt 3 mm for 10 mm bolt

HEXAGONAL HEAD BOLT t_Length

If round washers are not available use square washers of same thickness and width as round washers.

The nailhead should be countersunk about 2-3 mm for the 4 mm nail and 4 mm for the larger nails and it will in harder wood be necessary to predrill for this before drilling the main hole, The nailhead should be covered with mastic to assist against corrosion.

BOLTS

Coach bolts also called carriage bolts or more correctly cup-square coach bolts are used in boat building but they are increasingly being seen as "specials" and often only made with an electroplated finish.

Ordinary hexagonal head steelbolts are easier to buy hot dipped galvanized. For timber construction they must be fitted with large washers. Most bolts for the boats In this publication are 8 mm and normally not available in lengths above 120 mm, Longer bolts must be made from a hot dipped galvanized rod and threaded in both ends. The zinc-coating on the nut will provide some protection also for the bare threads, but in addition the threaded part should be smeared with bitumastic compound before inserting the bolt.

Rods threaded all along should not be used since the bearing area against the wood is reduced.

THREADED BOLT

ITEM

QUANTITY

5.2 m

6.3 m

7.4 m

8.5 m

Hexagonal head bolt, hot dipped

galvanized, with nut.

Alternative: Cup - square coach bolt.

hot dipped galvanized, with nut.

8x80

31

45

51

57

8x 100

8

19

20

21

8x 120

14

16

18

20

8x 140

9

11

13

15

8x 150

2

2

2

2

8x 170

10

12

14

16

10x80

2

2

2

2

lOx 100

2

2

2

2

10 x 120

3

4

5

6

lOx 170

1

1

1

1

Rod, hot dipped galvanized of 8 mm

and 10 mm will be required if the sizes

given above is not available,

Washer, large size, round or square.

hot dipped galvanized.

The quantity must be For bolt 8

140

220

260

280

increased if bolts are For bolt 10

18

20

22

24

to be made from rod.

Nut, hot dipped galvanized

Quantity depend on the number of bolts

that have to be made from rod.

Nails, hot dipped galvanized, either

boat nails or round wire nails cut down

in length or specially ordered from

local nail factory,

Diameter =4 mm ( 8 SWG ) x 50

8 kg

10 kg

12 kg

13 kg

About 170 nails / kg

Diameter = 5 mm ( 6 SWG ) x 75

0.5 kg

0.5 kg

0.5 kg

0.5 kg

Diameter = 5 mm ( 6 SWG ) x 100

0.5 kg

0.5 kg

0.5 kg

0.5 kg

Bitumastic compound (Roofing

compound, Hydroseal etc.)

5 kg

5 kg

6 kg

7 kg

Nylon fly screen, 1 m wide

1 m

1 m

1.5 m

2 m

Caulking cotton, quantity depends

on what is available in trade,

Filler

1 kg

1.5 kg

2 kg

2 kg

Wood primer

5 kg

6 kg

7 kg

7 kg

Paint

6 kg

7 kg

8 kg

8 kg

Antifouling paint

1 kg

1 kg

1.5 kg

1.5 kg

Paint thinner

2 L

2 L

2 L

31

Buoyancy material, polyurethan,

polystyrene, plastic container etc.

0.1 cub.m

0,1 cub.m

0.1 cub.m

0,1 cub.m

Sailing rudder fitting, emergency sail

see drawing.

Sailing Emergency Rudder

20 X

20 X

irKt,u\\d\ngpase irKt,u\\d\ngpase

Sailing Emergency Rudder

Gtoove^P^

bort

Gtoove^P^

bort

Plywood Boat ConstructionSailing Emergency Rudder

mawwames.

tempotoiy fte, s tempotoiy fte,

4x50 ptedtffl 3.5

  • ofcbench
  • ofcbench
Sailing Emergency Rudder

1 and 2

Countersink 15

FRAME

1 and 2

2 Mark a Vine be\o* bottom Vine.

-s, otaw a Vine trough the two

1 Mark a line the of the chine width

2 Mark a Vine be\o* bottom Vine.

-s, otaw a Vine trough the two points

A cut oft the frame along the Vine m

Mark

Hold inner edge of plank against this point

Hold inner edge of plank against this point

Boat Chine Drawing

Mark

Hold outer edge of plank against this point

Hold outer edge of plank against this point

Make a second copy

Make a second copy

Curve Edge Picture Frame

Draw a curve through these points

Draw a curve through these points

Boat Chine Drawing
Make pattern from plywood 4 - 6 mm
Strip Plank Boat Design
Mark middle line
How To Have A Perfect Boating Experience

How To Have A Perfect Boating Experience

Lets start by identifying what exactly certain boats are. Sometimes the terminology can get lost on beginners, so well look at some of the most common boats and what theyre called. These boats are exactly what the name implies. They are meant to be used for fishing. Most fishing boats are powered by outboard motors, and many also have a trolling motor mounted on the bow. Bass boats can be made of aluminium or fibreglass.

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  • alfrida
    How to nail strip planks?
    7 years ago

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