Page 100 - Nicolaes Witsen & Shipbuilding in the Dutch Golden Age

Chapter Two
Figure 2.76. (top left) Plate XXIII. Knee on the transom.
Figure 2.77. (top right) Plate XXI. Knee in the hold.
Figure 2.78. Crutch.
(bottom) Plate XXIII.
(75 II 21) 18. About the main Mast Step. ThismaststepisinthemiddleoftheK eelson,and
comes 6 feet aft of the middle of the ship.
1. Two rider oors surround the main mast step.
2. These are thick 12 inches, broad 14 inches.
3. They lie apart 31⁄2 feet. The forward rider oor lies
abaft the beam of the main hatch.
4. There four bilge riders are tted, 2 forward, 2 aft:
the bilge riders thick 10 inches: their breadth accords below with the rider oors: the lower ends long 8 feet, the upper ends long 7 feet, and 2 inches narrower than below as accordingly.
To each side of the keelson a chock is made, coming 4 inches above the keelson, thick 4 inches.
The Keelson is broader than the k eel, be- cause the mast step is to be made thereon and the ceiling fastened to it. It is bolted onto the keel: serves to strengthen the en tire ship, and ma y by righ t be called the inner keel. It often has a scarf forward.
. ..
(153 I 34) Meanwhile make the Keelson with a scarf, as shown at a on the plate EE [fig. 2.81]. Through ev- ery or every second oor timber a bolt with a clench is driven, through the Keelson, Floor, and also, but for one and a half inch through the keel.
(267 I 52)
(75 I 47) 15. About the Keelson.
1. The Keelson thick 9 inches. 2. Broad 2 feet 4 inches.
3. The Scarf long 5 feet.
4. The ends of the scarf thick 2
and aft, narrower and thinner.
1⁄2 inches, for ward
Mast steps are sturdy timbers, in the bottom of the ship, in which the masts stand with their ends.
(54 II 28)
82
And when the breasthook there is laid on the end of the W aterway, then place underneath the Foremast Step against the breasthook and across the ends of the ceilings a chock, calledRising wood, which is made as shown at l in BB [fig. 2.83].
(152 II 35)