| Civil Engineering question #71371 04/04/06 11:45 AM 04/04/06 11:45 AM |
Joined: Sep 2005 Posts: 1,187 38.912, -95.37 _flatlander_ OP
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Posts: 1,187 38.912, -95.37 | Designing a pathway for dollies and "trax" from a Dry Storage Lot to the beach. What would be a suggested slope for two persons to easily transport up to 500 pounds of vessel?
John H16, H14
| | | Re: Civil Engineering question
[Re: _flatlander_]
#71372 04/04/06 12:27 PM 04/04/06 12:27 PM |
Joined: Jan 2004 Posts: 1,884 Detroit, MI mbounds
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Posts: 1,884 Detroit, MI | What would be a suggested slope for two persons to easily transport up to 500 pounds of vessel? Downhill. Next? | | | Re: Civil Engineering question
[Re: _flatlander_]
#71374 04/04/06 01:05 PM 04/04/06 01:05 PM |
Joined: Jul 2005 Posts: 306 St. Louis, MO hobienick
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Posts: 306 St. Louis, MO | Assuming 200lbs of force to drag it up the slope, 23.5 deg from horizontal.
Angle = asin(drag force / weight)
If you want to only pull with 100 lb of force then 11.5 deg slope.
This is of course assuming no friction as using a set of beach wheels on a prepared surface will be close enough to zero friction for this purpose.
If you really want to get it dead on, determine your coeeficient of friction and use this formula:
Pull Force = Weight[Fcoeff * cos(angle) + sin(angle)]
But again, for practical purposes you can assume no friction. If you want to be sure multiply your desired pull force by 1.1 to "build in" a safety factor.
Last edited by hobienick; 04/04/06 01:12 PM.
Nick
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Previous Boats '84 H16 '82 H18 Magnum '74 Pearson 30 St. Louis, MO
| | | Re: Civil Engineering question
[Re: _flatlander_]
#71375 04/04/06 04:11 PM 04/04/06 04:11 PM |
Joined: Aug 2001 Posts: 1,307 Asuncion, Paraguay Luiz
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Posts: 1,307 Asuncion, Paraguay | Maximum recommended slope for cars (short distance) is 20%, meaning you go up 20 for each 100 of horizontal distance.
Maximum recommended slope for cars (road) is 5%, meaning you go up 5 for each 100 of horizontal distance.
Anything in between will work.
Luiz
| | | Re: Civil Engineering question
[Re: _flatlander_]
#71376 04/04/06 07:48 PM 04/04/06 07:48 PM |
Joined: Jun 2001 Posts: 40 Mesa, AZ basketcase
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Posts: 40 Mesa, AZ | Actual, the answer is as flat as possible. Sure dont want to have an easy path to take the vessel down to the water in the morning, then after a hard day of sailing have to drag 500 lbs uphill . ADA requirements want about a max 5% slope, but you can get by with a greater slope for less distances, but have landings in between. Just cause water is usually down the beach, you are going to have it downhill somewhat. I would try and shot for around 1-2% for your slope. That is roughly what you see on a cross slope in a road (from the centerline to the curb/gutter). But like I said, the flatter the better. Jonathan Grant Mesa, AZ Boatless | | | Re: Civil Engineering question
[Re: Dan_Delave]
#71378 04/04/06 09:19 PM 04/04/06 09:19 PM | Anonymous
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Unregistered | I have found that even getting up a small 3" lip in my storage unit is tuff. I have to get a running start at it, even with a dolly on the front of the trailer. Will be a little easier on CatTrax, but ruff after a long day of sailing. | | | Re: Civil Engineering question
[Re: Dan_Delave]
#71379 04/04/06 09:21 PM 04/04/06 09:21 PM |
Joined: Sep 2005 Posts: 1,187 38.912, -95.37 _flatlander_ OP
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Posts: 1,187 38.912, -95.37 | Thanks to all for the replies.
Dan, I'd kicked around the idea of something motorized and a track. We will eventually build a seawall and install a crane for bigger OD's (J22), but that is down the road. Representing the beach launched boats I wanted to make sure we didn't compromise expenditures on our end, to help them get going sooner (i.e. phased project/phased funding) and be disappointed for not "stretching" out and asking for all the proper room.
John H16, H14
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[Re: _flatlander_]
#71380 04/04/06 09:27 PM 04/04/06 09:27 PM | Anonymous
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Unregistered | John:
Have everyone chip in an buy a cheap 3 wheeler are one of the two sheet go carts like things that Wallmart and Pep Boys sells. Know what I am talking about?
Doug | | | Re: Civil Engineering question
[Re: ]
#71381 04/05/06 08:16 AM 04/05/06 08:16 AM |
Joined: Sep 2005 Posts: 1,187 38.912, -95.37 _flatlander_ OP
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Posts: 1,187 38.912, -95.37 | Doug,
Yes I do. Then it becomes a liabilty concern we don't really need, but thanks.
John H16, H14
| | | Re: Civil Engineering question
[Re: _flatlander_]
#71382 04/08/06 05:21 PM 04/08/06 05:21 PM |
Joined: Nov 2005 Posts: 96 Carl
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Posts: 96 | Just an added note - Handicap ramps are a max. 1 in 12 degree slope . That is one inch rise per foot {12 in} length. Take a laser level and note the total grade difference . If it is 36 inches IE you need 36 ft of ramp . Hope that and this helps http://www.adaptiveaccess.com/handicap_ramps.php | | |
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