Singletrack Forum » Topic: Formula?? ( not brakes but mathematics ) Question for the builders!
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mrben100 on "Formula?? ( not brakes but mathematics ) Question for the builders!"
http://singletrackworld.com/forum/topic/formula-not-brakes-but-mathematics-question-for-the-builders#post-5120265
Mon, 01 Jul 2013 20:44:09 +0000mrben1005120265@http://singletrackworld.com/forum/<p><blockquote>tymbian - Member<br />
Thanks mrben. What formula/ program did you use?<br />
</blockquote></p>
<p>Just did it in CAD innit (as use it for work), what your seeing is just a screen shot, drawn 1to1 scale and measured the results. I would only be able to figure out a formula having already drawn it.
</p>chives on "Formula?? ( not brakes but mathematics ) Question for the builders!"
http://singletrackworld.com/forum/topic/formula-not-brakes-but-mathematics-question-for-the-builders#post-5120121
Mon, 01 Jul 2013 19:57:29 +0000chives5120121@http://singletrackworld.com/forum/<p>It's a beam camber (assuming you want the curve to be part of a true circle as shown by mrben above) there are a few different ways to lay it out, a compass method and a straight line method - google beam camber calculations (boatbuilding) and you'll probably find them.
</p>tymbian on "Formula?? ( not brakes but mathematics ) Question for the builders!"
http://singletrackworld.com/forum/topic/formula-not-brakes-but-mathematics-question-for-the-builders#post-5120003
Mon, 01 Jul 2013 19:15:04 +0000tymbian5120003@http://singletrackworld.com/forum/<p>Thanks mrben. What formula/ program did you use?</p>
<p>I lined up the riser today and clamped it into what I thought was the right position. When measuring I had 310mm and 370mm right.</p>
<p>Just goes to show that you can't beat the squint of a tradesmans eye.. <img src="http://singletrackworld.com/forum/my-plugins/bbcode-buttons/default/icon_smile.gif" title=":-)" class="bb_smilies" alt=""/> </p>mrben100 on "Formula?? ( not brakes but mathematics ) Question for the builders!"
http://singletrackworld.com/forum/topic/formula-not-brakes-but-mathematics-question-for-the-builders#post-5119304
Mon, 01 Jul 2013 14:12:07 +0000mrben1005119304@http://singletrackworld.com/forum/<p>Well, for the puroposes of closure..........some check dimensions to the nearest mm based on a steady curve (radius shown).</p>
<p><a href="http://s597.photobucket.com/user/mrben100/media/Dimensionedcurve_zps83cc53a7.jpg.html"><img src="http://i597.photobucket.com/albums/tt59/mrben100/Dimensionedcurve_zps83cc53a7.jpg"></a>
</p>tymbian on "Formula?? ( not brakes but mathematics ) Question for the builders!"
http://singletrackworld.com/forum/topic/formula-not-brakes-but-mathematics-question-for-the-builders#post-5118069
Mon, 01 Jul 2013 06:53:26 +0000tymbian5118069@http://singletrackworld.com/forum/<p>Yep, my trusty Festo.
</p>trail_rat on "Formula?? ( not brakes but mathematics ) Question for the builders!"
http://singletrackworld.com/forum/topic/formula-not-brakes-but-mathematics-question-for-the-builders#post-5117574
Sun, 30 Jun 2013 20:37:05 +0000trail_rat5117574@http://singletrackworld.com/forum/<p>got a good jigsaw ?
</p>pymwymis on "Formula?? ( not brakes but mathematics ) Question for the builders!"
http://singletrackworld.com/forum/topic/formula-not-brakes-but-mathematics-question-for-the-builders#post-5117561
Sun, 30 Jun 2013 20:34:42 +0000pymwymis5117561@http://singletrackworld.com/forum/<p>Trail Rat has it in one. </p>
<p>The pro's preferred method. No fannying about. Quick. Easy.
</p>tymbian on "Formula?? ( not brakes but mathematics ) Question for the builders!"
http://singletrackworld.com/forum/topic/formula-not-brakes-but-mathematics-question-for-the-builders#post-5117558
Sun, 30 Jun 2013 20:34:21 +0000tymbian5117558@http://singletrackworld.com/forum/<p>I have to curve the ' Rise ' which is a length of decking face on. Once I have the rafter ends cut to length to form the curve I can fix the decking riser. Once the ' rise ' is fixed i will overhang the decking tread and cut to length.
</p>trail_rat on "Formula?? ( not brakes but mathematics ) Question for the builders!"
http://singletrackworld.com/forum/topic/formula-not-brakes-but-mathematics-question-for-the-builders#post-5117440
Sun, 30 Jun 2013 20:00:05 +0000trail_rat5117440@http://singletrackworld.com/forum/<p>lay it all normally with an overlap - then mark the overlapped decking in situ with the curve you want</p>
<p>cut.
</p>tymbian on "Formula?? ( not brakes but mathematics ) Question for the builders!"
http://singletrackworld.com/forum/topic/formula-not-brakes-but-mathematics-question-for-the-builders#post-5117417
Sun, 30 Jun 2013 19:53:34 +0000tymbian5117417@http://singletrackworld.com/forum/<p>That's it. The red curve is the one I'm after. I need to transfer it to the decking though. If I was to devide the 4m up into 10 equal bits how much, going from L to R is each section bigger than the previous?
</p>mrben100 on "Formula?? ( not brakes but mathematics ) Question for the builders!"
http://singletrackworld.com/forum/topic/formula-not-brakes-but-mathematics-question-for-the-builders#post-5116846
Sun, 30 Jun 2013 16:14:06 +0000mrben1005116846@http://singletrackworld.com/forum/<p><blockquote>Haze - Member<br />
Draw it to scale?</blockquote></p>
<p>Probably a formula, but drawing is easier - also different types of curve possible.</p>
<p><a href="http://s597.photobucket.com/user/mrben100/media/Curve_zps08b8dab7.jpg.html"><img src="http://i597.photobucket.com/albums/tt59/mrben100/Curve_zps08b8dab7.jpg"></a></p>
<p>Edit: drawn in plan obviously
</p>tymbian on "Formula?? ( not brakes but mathematics ) Question for the builders!"
http://singletrackworld.com/forum/topic/formula-not-brakes-but-mathematics-question-for-the-builders#post-5116762
Sun, 30 Jun 2013 15:32:54 +0000tymbian5116762@http://singletrackworld.com/forum/<p>Bumping up.
</p>tymbian on "Formula?? ( not brakes but mathematics ) Question for the builders!"
http://singletrackworld.com/forum/topic/formula-not-brakes-but-mathematics-question-for-the-builders#post-5115680
Sat, 29 Jun 2013 22:10:09 +0000tymbian5115680@http://singletrackworld.com/forum/<p>I know the rise but thats not important atm. the treads are going level from right to left. If you were to look along the ' nose ' of the step it would curve outwards from 0mm to 250mm over a distance of 4.0m.
</p>willyboy on "Formula?? ( not brakes but mathematics ) Question for the builders!"
http://singletrackworld.com/forum/topic/formula-not-brakes-but-mathematics-question-for-the-builders#post-5115304
Sat, 29 Jun 2013 19:57:40 +0000willyboy5115304@http://singletrackworld.com/forum/<p>You need to know the 'going' and the 'rise' when building steps<br />
They are the overall height and the distance to be travelled. Look at building regs for advice. The formula is 2r + g = nlt 550/ nmt 700
</p>Haze on "Formula?? ( not brakes but mathematics ) Question for the builders!"
http://singletrackworld.com/forum/topic/formula-not-brakes-but-mathematics-question-for-the-builders#post-5115273
Sat, 29 Jun 2013 19:44:36 +0000Haze5115273@http://singletrackworld.com/forum/<p>Draw it to scale?
</p>tymbian on "Formula?? ( not brakes but mathematics ) Question for the builders!"
http://singletrackworld.com/forum/topic/formula-not-brakes-but-mathematics-question-for-the-builders#post-5115263
Sat, 29 Jun 2013 19:41:33 +0000tymbian5115263@http://singletrackworld.com/forum/<p>I'm after curving some decking steps thus...</p>
<p>Your looking at the decking, 4 steps left, 4 on the right. each step/ tread on the left is 250mm deep, each on the right 500mm deep, space in between 4m.<br />
I need a steady curve from 0 to 250mm ( which is the difference between 250 & 500mm ) over a distance of 4 meters. Say at an equal spacing every 400mm.</p>
<p>Is there a formula?
</p>