Estimate of amount of timber for a frigate from Joshua Humphreys
Document 1794Responding to Knox's request of 10 April, Humphreys provides an estimate of the quantity of timber and plank for a frigate 147 feet keel, 43 feet beam, 14 feet hold. He estimates it will take 55 men two months to cut the live oak and cedar required for construction of frigate. He provides detailed measurements in his calculations.
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wages of the Journeymon a shilling or two per day, which would occasion great embarrassment, if not ruin, to the undertakers. Hence it would appear to follow as a consequence that if the Shipbuilders of Philadelphia, some of whom have considerable capitals, would decline a contract, that it would be almost or quite impracticable to obtain the building by contract elsewhere. If this should be so then Agents respectable for their intelligence, activity, and integrity, must be sought in the places in which the said frigates are directed to be built.
The President of the United States has approved of the said vessels being built under the directions of some agent or agents which I presume it will be in your department to nominate to him.
I suppose however if you should find it practicable to build them by contract, that the subject will still be reconsidered by him, and as for myself I should find great satisfaction in a contract, if one, upon solid principles, could be obtained.
[Estimate of timber &c for a frigate made by Joshua Humphreys]
An estimate of the quantity of Timber Plank &c for a frigate of 147 feet Keel, 43 feet beam, 14 feet hold, 6 feet 9 inches between decks, and 7 feet waist
1 piece for keel 80 feet long, 18 by 24 inches in middle
2 d° 55 d° 1 of 18 by 30 d°, and 1 of 18 by 23
1 sternpost knee as long as can be had
1 stem Keelson rider, and one for stern
1 piece dead wood forward
d° d° 24 inches by 8, 100 feet, or 2 of 50 feet
[all the plank to be as long as possible, 60 or 70 feet if possible]
1 lower piece stem, and five pieces for keelsons 310 ft, 18 in. square
80 floor raising timbers and crotches.
2000 feet of 6½ inch wales 9 inches wide running measure
200 d° 5 d° 9 d° d°
4200 d° wale stuff 6 by 9 for decks d°
[White oak]
2000 d° 4 inch plank for gun deck
4000 feet scantling for carlings 6 by 6 reduced measure
1000 d° 6 by 9 d°
1 deck stem and 1 deck sternpost knee to mizzen v° foremast
1400 feet of 5 inch plank 12 inches wide for clamps.
600 feet of 6 d° 10 inches wide for timber streaker running measure
1000 d° 5 d° 14 d° inside bilge streaks d°
1500 d° scantling for carlings for orlop deck
18000 feet of 4 inch plank for bottom and ceiling
200 good white oak logs
1000 feet running measure of 5 inch plank, 900 of 4½ inch and 5000 feet 3 inch
[Pitch pine]
10000 feet of 3½ heart pine plank for lower deck
7000 d° 4 d° gun d°
8000 d° 3 d° quarter deck & forecastle
54 heart pitch pine beams for lower deck 14 by 16, 30 to 42 ft. long
60 d° d° gun deck 15 by 18, 30 to 40 ft long
12 d° forecastle 10 by 11 & 12 by 13, 22 to 35 feet long
34 d° for quarter deck 10 by 11 and 13 by 14, from 28 to 36 ft. long
50 d° orlop beams 10 by 12 30 to 38 feet long
6000 ft. Jersey pine two inch plank for orlop deck
170 live oak lower futtocks
174 d° middle d°
178 d° upper d° [Those timbers are calculated for four tier, but it is doubtful whether they can be procured that length, if not add 340]
150 live oak } toptimbers
50 red cedar }
200 cedar half timbers
[The Knees may be had in North Carolina, the live in Georgia]
[Live oak and Red cedar]
2 live oak Knight heads
8 d° hausepieces
12 d° bow timbers
1 d° upper piece stem & 1 piece apron
40 d° stanchions
1 d° sternpost 30 feet long, sided 17 inches
1 d° transom 30 d°, 22 inches square & 10 smaller ones
2 d° corner counter timbers
4 d° middle d°
12 cedar half timbers d°
500 knees for lower and gun deck of live oak
130 d° quarter deck and forecastle d°
8 d° for transom d°
2 d° d° standard d°
8 live oak breasthooks from 18 to 20 feet long d°
6 pieces for partners for masts live oak
200 feet 1¼ inch copper bolts for breasthooks
1600 d° 1½ d° for floor, keelson, dead wood, and sternpost knees
[from Sweden]
850 d° 1⅛ d° for stem, stern, keel scarf, rudder
and riders
1350 feet 1⅜ inch for keel & bilge bolts
7 pair composition braces and pintles for rudder
[made in Philad.]
16 composition dovetail plates
12000 feet of sheet copper for bottom
5200 feet cedar, 1 inch, and of half inch.
30000 feet boards and scantling
50000 locust trunnels, 18 inch, 24 inch, & 30 inches long
I think it will take 55 men two months to cut the timber of live oak and red cedar, calculating 24 working days in a month, for one ship.
Joshua Humphreys
[Joshua Humphreys, Philadelphia]
General Knox presents his compliments to Mr Humphreys and will be much obliged to him to favor him as early as possible (if convenient to day, so much the better) with an estimate of the quantity of timber and plank necessary to build a ship of forty four guns distinguishing the tons of timber from the plank and the probable cost of each article.
1 May 8. 1794
Type
Letterbook
Description
Responding to Knox's request of 10 April, Humphreys provides an estimate of the quantity of timber and plank for a frigate 147 feet keel, 43 feet beam, 14 feet hold. He estimates it will take 55 men two months to cut the live oak and cedar required for construction of frigate. He provides detailed measurements in his calculations.
Date
05/08/1794
Author
Recipient
Document number
1794050800055
Page start
24
Notable persons
Joshua Humphreys
Henry Knox
Notable locations
Georgia
North Carolina
Philadelphia
Notable items
white oak
pitch pine
foremast
decks
clamps
bilge
heart pine plank
quarterdeck
forecastle
top timber
fulhooks
red cedar
knightheads
stanchion
transom
breastworks
bilge bolts
sheet copper

