Eljen GSF A42 - Page 44

2018 Indiana Design and Installation Manual 44 www.eljen.com
7.1 Sloped Above Grade Bed Design Example
DESIGN REQUIREMENT: 410 IAC 6-8.3-80 states use the greater result: (for this section, the Minimum Bed
Width is equivalent to the Aggregate Bed Width referred to in section 80)
a) Minimum basal area width = minimum basal area (from Table 9) ÷ bed basal area length
A42: 1206 ft
2
÷ 81 ft = 14.9 ft B43: 1206 ft
2
÷ 69 ft = 17.5 ft
b) For slopes, greater than 0.5%:
Minimum Basal Area Width + 9 ft
A42: 6 ft + 9 ft = 15 ft B43: 8 ft + 9 ft = 17 ft
Minimum basal area width is the greater of a or b.
A42: a) 14.9 ft
A42: b) 15 ft
Use 15 ft for Basal Area Width
B43: a) 17.5 ft
B43: b) 17 ft
Use 17.5 ft for Basal Area Width
Final Dimension Layout
(Note: System layout and number of rows will vary based on site constraints)
A42
Basal Area Length: 81 ft
Basal Area Width: 15 ft
Minimum Number of Units: 40 A42 Modules
Center to Center Spacing: 3 ft
Edge to Center Spacing: 1.5 ft
Designed Basal Area: 1,215 ft
2
B43
Basal Area Length: 69 ft
Basal Area Width: 17.5 ft
Minimum Number of Units: 34 B43 Modules
Center to Center Spacing: 4 ft
Edge to Center Spacing: 2 ft
Designed Basal Area: 1,207.5 ft
2