Page 271 - Nicolaes Witsen & Shipbuilding in the Dutch Golden Age

Pinas Drawings
Witsen’s Formulas
Bilge stringers:
Thickness = a little more than the
ceiling planks
Lower deck clamp: Thickness = 1⁄2 i.s. Lower deck beam knees: Thickness = 2⁄3 i.s. Riders, etc. = 2⁄3 i.s.
Waterways, lower deck: Thickness = 1⁄3 i.s. Width = 12⁄3 i.s.
Binding strakes: Thickness = 1⁄4 i.s. Width = 11⁄4 i.s. Ledges: Thickness = 1⁄4 i.s.
Carlings: Thickness = 1⁄3 i.s.
Lower wales: Thickness = 1⁄2 i.s. Width = i.s.
Van Yk’s Formulas
Bilge stringers: Thickness = 1⁄3 i.s.
Lower deck clamp:
Thickness = 2⁄5 i.s.
Lower deck beam knees:
Thickness in the middle = about the
thickness of the deck beam
Waterways, lower deck: Thickness = 1⁄3 i.s.
Riders:
Width = 7⁄8 i.s. Thickness = 2⁄3 i.s. Binding strakes: Thickness = 1⁄3 i.s.
Ledges:
Width and thickness = thickness of
planking Carlings:
Width and thickness = thickness of planking
Lower wales:
Width = 12 inches per 100 feet L; − 1
inch per 10 feet shorter, + 1 inch
per 10 feet longer
Thickness = 1⁄2 width
Length of joints = 1⁄2 foot per 1 inch
width of the wale, over at least 5 frames
Upper deck beams:
Height = 2⁄3 lower deck beams Width = 2⁄3 lower deck beams Camber = a little more than the
camber of the lower deck beam Upper deck clamps:
Thickness = 1⁄3 i.s.
Gunports:
Height = 1⁄3
Width = a little more Upper deck beams: Height = 2⁄3 i.s. Width = 2⁄3 i.s Camber = 5⁄6 i.s.
Upper deck clamp: Thickness = 1⁄5 i.s. Waterways, upper deck: Thickness = 1⁄4 i.s. Lower deck planking: Thickness = 1⁄6 i.s.
“ ’tween decks”
253