8
Pad
The station can be installed on either a newly poured pad or an existing concrete surface. The
mounting surface must be smooth and cannot exceed a slope of 6.35 mm per 304.8 mm (0.25 inches
per foot).
The concrete pad must either be designed to be site-specific, or must meet these specifications:
• At least 305 mm (12 in) deep (or deep enough to be 305 mm (12 in) below the frost line)
• At least 1296 mm (51 in) on each side
• Contains #4 rebar or larger, top and bottom, 305 mm (12 in) on center
• Concrete 2500 PSI minimum
The above pad specifications are designed to meet these conditions:
• 170 mph wind speed
• Wind Risk Category I
• Wind Exposure D
• Seismic Importance Factor 1.0
• Hayward Fault with mapped spectral response accelerations Ss=2.45 S1=1.019
• Seismic Design Category E
• Foundation of Sandy Soil with allowable stress = 1500 psf, Cd = 1.33
In some extreme conditions, a larger pad would be required. For sites with less stringent seismic,
soil, or wind conditions, a smaller pad might be possible.
If the existing pad does not meet the specifications above, it must be inspected and approved by a
structural engineer for the Express 250’s dimensions and weight. If needed, give these structural
design specifications to the structural engineer for verification:
Product Weight 340 kg (750 lbs)
Product Height from Ground 2.230 m (7.317 ft)
Product Width 0.71 m (2.33 ft)
Product Frontal Area Height * Width
CG Height 1.12 m (3.66 ft)
Number of Anchor Bolts 4
Bolt Pattern See dimensioned images in this section
Anchor Bolt Size M16 (5/8 in)
Anchor Bolt Embedment 229 mm (9 in)
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