Designing concrete foundation for rain gauges - AWS810

AWS810 Installation Guide

Document code
M212418EN
Revision
G
Language
English
Product
AWS810
Document type
User guide
CAUTION All design values mentioned in this manual are purely indicative. Vaisala does not take responsibility for their applicability to the area in question.

Prepare the concrete foundation before mounting the equipment. Build the surroundings and the level of foundations in accordance with local and state legislation and regulations.

Table 1. Soil type and concrete qualityTo determine the size for the concrete foundation, see the following tables.
Soil type Angle of friction Weight by volume Cohesion Concrete strength class
I: Sand, sandy soil 25° 17 kN/m3 0 kN/m2 > K30
II: Compacted coarse sand and moraine 40° 21 kN/m3 0 kN/m2 > K30
III: Hard clay 19 kN/m3 20 kN/m2 > K30
Table 2. Recommended dimensions for circular rain gauge foundation
Dimension Soil type I and II Soil type III
Diameter 600 mm (23.62 in) Do not use circular foundation for soil type III.
Height 600 mm (23.62 in)
In a groundwater area, the foundation must be deeper or wider.
Figure 1. Circular foundation for rain gauge
1
Foundation accessories
2
Surface level
3
Reinforcement bar
4
Cable conduit
Table 3. Recommended dimensions for square rain gauge foundation
Dimension Soil type I and II Soil type III
Length 500 × 500 mm (19.69 × 19.69 in) 500 × 500 mm (19.69 × 19.69 in)
Height 700 mm (27.56 in) 900 mm (35.43 in)
Figure 2. Square foundation for rain gauge
1
Foundation accessories
2
Surface level
3
Wedge bolt