Pontoon Float Draft - V4
description
Transcript of Pontoon Float Draft - V4
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Pontoon Float or Boat Draft CalculationThis calculator assumes that a pontoon float or boat consists of two or more pontoons tiedtogether by some form of structure, which is decked over to form a platform for people and gear.
Assumptions:Dpontoon 27in Diameter of the pontoon pontoon 54.07
lbfft
Unit weight of the pontoonLpontoon 48ft Length of the pontoon
DLstruct 2747lbf Weight of platform, hardware, etc.Npontoon 2 Total number of pontoons
Unit Weight of waterFresh: 62.4Salt: 64
water 62.4lbf
ft3
Calculations:DLvessel pontoon Lpontoon Npontoon DLstruct
DLvessel 7937.72 lbf Total weight of the pontoon boat (unloaded)
Vpontoon Dpontoon
2
2
Npontoon Lpontoon Calculate the total volume of the pontoons
Calculate the Recommended Maximum Gross Loadper: "Construction Standards for Small Vessels (2010)"TP 1332 E - Section 4
GLvesselVpontoon water DLvessel
2
GLvessel 7940.29 lbf Recommended Maximum Gross Load - Passengers & Gear
Volume of waterdisplaced by just thepontoon boat weight
DLVolDLvesselwater
DLVol 127.21 ft3
Volume of waterdisplaced by pontoonboat + peaple + gear
GLVolDLvessel GLvessel
water GLVol 254.46 ft3
End area of submergedpontoon, pontoon boatweight
DLAreaDLVol
Npontoon Lpontoon DLArea 1.33 ft2
End area of submergedpontoon, pontoon boatweight + peaple + gear
GLAreaGLVol
Npontoon Lpontoon GLArea 2.65 ft2
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In this next section, we need to use calculated values to pick values from a table. Table is attached at the end of this worksheet.
inTableDLDLArea
Dpontoon2
inTableLLGLArea
Dpontoon2
inTableDL 0.26 Find this number in the table, under the column area/D2. Pickthe value of d/D from the column to the left of your value, andenter it below.
Find this number in the table, under the column area/D2. Pickthe value of d/D from the column to the left of your value, andenter it below.
inTableLL 0.52
outTableDL 0.37 This is the number you picked off the table, in the d/D columnand from the same row as the value for inTableDL
This is the number you picked off the table, in the d/D columnand from the same row as the value for inTableLL
outTableLL 0.63
dDL outTableDL Dpontoon Multiply the value found above by the pontoon diameter tofind the submerged depth or draft of the pontoon boat underjust it's own weight.
dLL outTableLL Dpontoon Multiply the value found above by the pontoon diameter tofind the submerged depth or draft of the pontoon boat underjust it's own weight.
Results:dDL 9.99 in Submerged depth or draft of the pontoon boat under just it's own weight.
dLL 17.01 in Submerged depth or draft of the pontoon boat with passengers and gear.