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Project Information
Project Information
Calculations
SITE VARIABLES INPUTS
Module Size
-Please Select
60 Cell
72 Cell
96 Cell
Pole Mount Model
MT Solar LLC:
Select the number of solar panels you plan to install
-Please Select
TOP-2
TOP-3
TOP-4
TOP-4
TOP-6
TOP-8
TOP-9
TOP-10-TALL
TOP-12
TOP-15-TALL
TOP-16
TOP-20-TALL
TOP-20
TOP-24
TOP-25-TALL
TOP-28
TOP-30-TALL
TOP-32
TOP-35-TALL
TOP-36
TOP-40-TALL
TOP-40
TOP-44
TOP-45-TALL
TOP-48
TOP-50-TALL
TOP-52
TOP-55-TALL
TOP-56
TOP-60-TALL
TOP-60
TOP-64
TOP-65-TALL
TOP-68
TOP-70-TALL
TOP-72
TOP-75-TALL
TOP-76
TOP-80-TALL
TOP-80
TOP-84
TOP-85-TALL
TOP-88
TOP-90-TALL
TOP-92
TOP-95-TALL
TOP-96
TOP-100-TALL
TOP-100
TOP-104
TOP-105-TALL
TOP-108
TOP-110-TALL
TOP-112
TOP-115-TALL
TOP-116
TOP-120-TALL
TOP-120
TOP-124
TOP-125-TALL
TOP-128
TOP-130-TALL
TOP-132
TOP-135-TALL
TOP-136
TOP-140-TALL
TOP-140
TOP-144
TOP-145-TALL
TOP-148
TOP-150-TALL
TOP-152
TOP-155-TALL
TOP-156
TOP-160-TALL
TOP-160
TOP-165-TALL
TOP-170-TALL
TOP-175-TALL
TOP-180-TALL
TOP-185-TALL
TOP-190-TALL
TOP-195-TALL
TOP-200-TALL
(Number of Modules)
Desired Tilt Angle in Degrees
MT Solar LLC:
90 degrees is vertical. Steeper tilts reduce snow load but increase wind load.
-Please Select
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
(90 degrees is vertical)
Front Edge Ground Clearance (ft.)
MT Solar LLC:
Higher clearance will increase your foundation depth and may increase your pole size required.
-Please Select
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
(At tilt angle)
Wind Speed
MT Solar LLC:
Wind Speed is determined by location. Most solar arrays are Risk Category 1 since they are not installed where failure would hurt people. Most local building officials refer to higher wind speeds that are Risk Category 2 (structures over people). Consult an engineer for more information.
-Please Select
90
95
100
105
110
115
120
125
130
135
140
145
150
155
160
165
170
175
180
185
190
195
200
Exposure Category
MT Solar LLC:
Exposure B. Shall be assumed unless the site meets the definition of another type of exposure. Urban and suburban areas, wooded areas or other terrain with numerous closely spaced obstructions having the size of single-family dwellings or larger.
Exposure C. Open terrain with scattered obstructions, including surface undulations or other irregularities, having heights generally less than 30 feet (9144 mm) extending more than 1,500 feet (457.2) from the building site in any quadrant. This exposure shall also apply to any building located within Exposure B-type terrain where the building is directly adjacent to open areas of ExposureC-type terrain in any quadrant for a distance of more than 600 feet (182.9 m). This category includes flat open country, grasslands and shorelines in hurricane-prone regions.
Exposure D. Flat, unobstructed areas exposed to wind flowing over open water (excluding shorelines in hurricane-prone regions) for a distance of at least 1 mile (1.61 km). Shorelines in Exposure D include inland waterways, the Great Lakes and coastal areas of California, Oregon, Washington and Alaska. This exposure shall apply only to those buildings and other structures exposed to the wind coming from over the water. Exposure D extends inland from the shoreline a distance of 1,500 feet (460 m) or 10 times the height of the building or structure, whichever is greater.
-Please Select
B - Sheltered
C - Open
D - Coastline
Calculated Snow Load (PSF)
MT Solar LLC:
Depending on your local official, you may be allowed 50% or greater deductions off ground snow load due to snow sliding off the array. Consult an engineer for more information.
-Please Select
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
(Does not auto reduce for tilt.)
A reduction of ground snow load may be allowable due to snow sliding off of array.
Foundation Shape Desired
-Please Select
SQUARE
ROUND
Foundation Size Desired (ft.)
-Please Select
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5
7
Site Soil Classification Code
MT Solar LLC:
Many locations are Soil Class 3. You may be able to reduce your soil class by consulting a local Geotechnical Engineer to sample your soil instead of using the IBC classifications listed here.
1 - Crystaline Bedrock
2 - Sedimentary and Foliated Rock
3 - Sandy Gravel and/or Gravel
4 - Sand, Silty Sand, Clayey Sand, Silty Gravel, and Clayey Gravel
5 - Clay, Sandy Clay, Silty Clay, Clayey Silt, Silt, and Sandy Silt
-Please Select
1 - Crystaline Bedrock
2 - Sedimentary Rock
3 - Sandy Gravel
4 - Sand, Silty Sand
5 - Clay, Sandy Clay
Pole Size Desired
AUTO CALC
2" Sch 40
2" Sch 80
2.5" Sch 40
2.5" Sch 80
3" Sch 40
3" Sch 80
3.5" Sch 40
4" Sch 40
4" Sch 80
6" Sch 40
6" Sch 80
8" Sch 40
8" Sch 80
10" Sch 40
10" Sch 80
12" Sch 40
12" Sch 80
14" Sch 40
(select "Auto Calc" for best results)
OUTPUTS
Number of Poles
Support Pole Size Required
Mount Frame Duty
Spin Prevention Bolts Needed
Foundation Depth Required (ft.)
Ft. DEEP
Pole Height Above Grade
Ft.
FORCES
Calculated Wind Load on Array
lbs.
Force at Ground Level
(Wind Load x Pole Length)
(Picture the pole as a lever arm, the wind applies the force and the pole tries to move the dirt to lean over)
Rotational Twist/Torque (Single Pole)
ft-lbs.
Calculated Snow Load on Array
lbs.
Conversational OUTPUT
""
""
""
Copyright 2017 MT Solar LLC, All Rights Reserved.
Calculations based on ASCE 7-10 and IBC 2012
All information for project estimation purposes only.
WIND FORCE CALCULATIONS
Array N/S Dimensions (ft.)
ft
Array E/W Dimensions (ft.)
ft
B
Total Square Feet of Array
sq/ft
Tilt Angle in Radians
Effective Vert Dimension at Tilt Angle (ft.)
ft
s
Effective Horizontal Dimension at Tilt Angle (ft.)
ft
Effective Squ Ft. at Tilt Angle
sq/ft
As
Total Array Height at Tilt Including Clearance (ft.)
ft
h
Simple Wind PSF
psf
Simple Wind Force Total
lb/ft
Height/Exposure Coefficient
ASCE 7-10 29.3-1
Kz
Terrain Coefficient
1.00
Kzt
Wind Directionality Factor
ASCE 7-10 26.6-1
0.85
Kd
Wind Force PSF (Qz)
lb/ft
Qz
Gust Factor
ASCE 7-10 26.9.1
0.85
G
Ratio s/h
Ratio B/s
Force Coefficient Cf
ASCE 7-10 29.4-1
Cf
Effective Wind Load PSF
Effective Wind Total Force on Array (Case A)
F
Offset Wind Loading Force (Case B)
ft-kips
Effective Wind Total Force Per Pole (Case A)
Snow Load Total Vertical Force on Array (lbs.)
Snow Load Total Vertical per Pole (lbs.)
FOUNDATION DEPTH CALCULATIONS
Force Per Pole ( at Top of Pole)
lbs.
Pe
Pole Height Above Grade
ft
H
Site Soil Lateral Bearing Capacity
psf
Pba
Site Soil Vertical Bearing Capacity
psf
Vertical Bearing Area of Hole
squ. ft.
Max Vertical Bearing Capacity
lbs.
Hole Dimension
ft.
b
Allowable Lateral Soil Pressure
S1
Variable
A
Foundation Depth Required (ft.)
ft.
L
Copyright 2017 MT Solar LLC, All Rights Reserved.
Calculations based on ASCE 7-10 and IBC 2012
All information for project estimation purposes only.
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