DUDLEY DIX YACHT DESIGN

Didi MG30

Radius chine plywood

The following lists of materials are approximate and intended for calculation of approximate costs. We offer no guarantees of accuracy.

TIMBER LIST FOR HULL, DECK, BULKHEADS & BUILDING STOCKS

The list below is for construction of all woodwork excluding interior joinery and rudder. It covers building stocks, bulkheads, hull framing, hull skin, deck framing and deck skin. Allowance has been made for reasonable wastage and scarphing.
CHIPBOARD (for setting out bulkheads if building from offsets)
1,83x2,74m 16mm [6'x9'x5/8"] - 2 sheets

MARINE PLYWOOD 1,22x2,44m [4'x8']
6mm [1/4"] - 10 sheets
9mm [3/8"] - 10 sheets
12mm [1/2"] - 30 sheets

PINE or similar (for building stocks etc)
38x152mm [1 1/2"x6"] (rails) - 26m [92']
50x75mm [2"x3"] (bulkhead legs) - 30m [108']
100x100mm [4"x4"] or 100mm [4"] dia (posts) - 18m [59']

Cedar or similar, selected, free of knots, shakes fractures etc
20x20mm [3/4"x3/4"] Triangular fillet (structural cleats) - 25m [82']
22x22mm [7/8"x7/8"] (hatch trimmers) - 3m [10']
22x32mm [7/8"x1 1/4"] (tangent stringers) - 40m [131']
22x44mm [7/8"x1 3/4"] (stringers, cabintop beams) - 135m [443']
22x50mm [7/8"x2"] (hatch slides and trimmers) - 6m [20']
22x76mm [7/8"x3"] (stem capping) - 2m [6']
32x69mm [1 1/4"x2 3/4"] (sheer clamps) - 22m [72']

Mahogany or similar, selected, free of knots, shakes fractures etc
15x150mm [5/8"x6"] (keelson) - 4m [13']
32x32mm [1 1/4"x1 1/4"] (cleats for backbone and sheer clamps) - 7m [23']
32x220mm [1 1/4"x8 21/32"] (backbone) - 10m [33']
38x76mm [1 1/2"x3"] (stem) - 3m [10']
40x40mm [1 9/16"x1 9/16"] Triangular fillet (cleats to mast post) - 7m [23']
44x76mm [1 3/4"x3"] (doublers to keel floors) - 4m [13']
50x76mm [2"x3"] (deck beams) - 2m [7']

STEEL & LIST & LEAD FOR BALLAST KEEL

This list shows the steel materials required to construct the ballast keel. Sizes are the rectangles from which the profiles will be cut so no allowance need be made for wastage except for temporary braces as may be needed during construction.

3mm [1/8"] Plate
450x1600mm [18"x63"] - 2
150x1000mm [6"x40"] - 2
4mm [5/32"] Plate
800x1250mm [32"x50"] - 2
6mm [1/4"] Plate
400x1550mm [16"x61"] - 1
410x600mm [16 1/2"x24"] - 1
10mm [3/8"] Plate
100x650mm [4"x26"] - 1
170x900mm [7"x36"] - 1
325x1500mm [13"x59"] - 1

3" Sched 40 pipe - 1.25m [50"]
4" Sched 40 pipe - 1.25m [50"]
30mm dia Bar - 1.25m [50"]
M16 [5/8"] Hexhead bolts grade 5-6 or 316 S/S 180mm [7"] long - 14
M16 [5/8"] Nuts grade 5-6 or 316 S/S - 14

If keel and bolts are to be bonded to the hull in epoxy then replace the bolts with 316 S/S M16 Readybar (threaded bar) and another 14 nuts.

Lead poured into keel - 960kg [2116lb]

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This page was updated 18 November 2013

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