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Do I need to concrete the posts for a fence made of corrugated board? If metal pipes are rammed or simply driven in, then on heaving soils such a fence may lean after the first winter. Therefore, a fence made of corrugated board must be concreted - this is the only way it will stand for decades without the need for repairs. How often should I install posts for a fence made of corrugated board? The optimal middle is 2.5 meters. The optimal distance between the posts of a fence made of corrugated board is 2.5 meters. But as already noted, a span length of 2-3 meters will be reliable and highly durable. What is the depth of the fence posts? Unacceptable for heavy structures, as well as for building fences with blind sections in windy areas. The depth of the posts for a fence made of chain-link and euro picket fence when ramming is 0.8-1.2 meters. The depth of the fence posts made of corrugated board during rubble should be at least 1.2 meters. What kind of concrete is needed to install curbs??? Concrete grade M 250 belongs to the strength class B20 and is considered one of the most popular materials in large-scale construction. This is an intermediate grade between 200 and 300 numbers. It has similar indicators of frost resistance, water resistance and mobility. How to prepare concrete grade 250? The proportions of the components in concrete solution M250: 1 part cement; 2.1 parts fine filler; 3.9 parts coarse filler; 0.5 parts water.