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Hazard tree calculation

 
 
Jlute
 
Reply Mon 11 Apr, 2016 09:59 pm
hi! Simple question but I'm having a brain fart. Need to know how tall a tree would have to be for the top to land on a road 200 feet above the base of it fell on a 35% slope?
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Type: Question • Score: 3 • Views: 918 • Replies: 6
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Miller
 
  1  
Reply Mon 11 Apr, 2016 10:21 pm
@Jlute ,
Jlute wrote:

Need to know how tall a tree would have to be for the top to land on a road 200 feet above the base of it fell on a 35% slope?


How do you factor in, the wind velocity and age of the tree?
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fresco
 
  1  
Reply Tue 12 Apr, 2016 12:20 am
@Jlute ,
The wording of the question implies the road is above the tree.

The tree will fall on a slope angle whose tan=0.35, i.e. 19.29 deg.
Assuming the tree falls maximally up the slope, it will be the hypotenuse of a triangle whose opposite side is 200 ft.
Height=200/sin(19.29)
Height=605.42 ft.... That's unlikely ! ...Check your wording.
mark noble
 
  1  
Reply Tue 12 Apr, 2016 11:04 am
@Jlute ,
65ft
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ascribbler
 
  0  
Reply Wed 13 Apr, 2016 12:11 am
@fresco,
Quote:
Assuming the tree falls maximally up the slope, it will be the hypotenuse of a triangle whose opposite side is 200 ft.


Sine ( 35 degrees ) = 0.57357 = opposite / hypotenuse = 200 / tree

Tree = 349 feet
fresco
 
  1  
Reply Wed 13 Apr, 2016 12:54 am
@ascribbler,
?.
Percentage slope is defined as TANGENT.
That's why the wording needs to be checked.
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mark noble
 
  0  
Reply Thu 14 Apr, 2016 06:38 am
@ascribbler,
Are you applying (standardised) gravitational variance or electromagnetic containment?

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