Page 272 - Nicolaes Witsen & Shipbuilding in the Dutch Golden Age

Appendix
Table 1 (continued)
Witsen’s Formulas
Coamings of hatches on upper deck: Thickness = 1⁄3 i.s.
Inner frame thickness and width = 2⁄5
of the coaming
Groove width = 1⁄8
Ledges = 1⁄4 i.s.
Hatch beam = 1⁄3 i.s., the others less Forecastle and quarterdeck clamps: Thickness = 1⁄5 i.s.
Forecastle and quarterdeck beams: Thickness = 1⁄2 i.s.
Forecastle and quarterdeck knees: Thickness = 2⁄5 i.s.
Or: 1⁄2 i.s.
Forecastle and quarterdeck
waterways: Thickness = 1⁄4 i.s. Poop deck beams: Thickness = 1⁄3 i.s.
Poop deck clamps: Thickness = 1⁄6 i.s. Poop deck waterways: Thickness = 1⁄6 i.s.
Lower spur of the beakhead:
Length = 1⁄5 L
Width afore = 1⁄4 i.s. Width aft = 3⁄5 i.s.
Height afore = 1⁄2 i.s.
Top rail of the beakhead: Width aft = 1⁄2 i.s.
Width afore = 1⁄4 i.s. Thickness = 1⁄2 width Standard anchor bitt: Thickness = 11⁄3 i.s.
Bolster:
Thickness = 11⁄3 i.s.
Thickness of deal cheek = 11⁄2 i.s.
Van Yk’s Formulas
254
Forecastle and quarterdeck beams: Height = 2⁄3 upper deck beams Width = 2⁄3 upper deck beams Camber = a little more than the
camber of the upper deck beams
Poop deck beams:
Height = 2⁄3 quarterdeck beams Width = 2⁄3 quarterdeck beams Camber = a little more than the
camber of the quarterdeck
Sheer rail:
Width = 9⁄10 upper wales Thickness = 1⁄2 width of sheer rail Lower spur of the beakhead: Length = 1⁄8 L
Width = outside stem
Depth = i.s.
Top rail of the beakhead: Width: = width of sheer rail Thickness = 1⁄2 width
Standard anchor bitt: Thickness = height of keel Width = 9⁄10 height of keel Bolster:
Thickness = width of standing part Width = 9⁄10 width of standing part