2. On-site Photograph
Weight steel frame groundwork
	The foundation is very important. Concrete is very strong in the power to crush. The power to crush and the power of iron to pull are very strong. Therefore, iron has helped the weak place of concrete. This is ferro-concrete. Since a left photograph is the foundation without a stake The big base is constructed.
	There is a kind of steel rods by thickness and strength. Thickness is 10・13・16・19・22・25 mm. SD of strength is common. if this is 13mm -- 30t -- it bears for pulling Of course, a basic steel rod is decided by severest structure calculation in the world. Supervisor of a construction company the rest It is important to make the craftsman construct firmly. A left photograph is the place which constructed the basic steel rod.
	The pillar of the foundation and a steel frame Being fixed exactly is important. Since high accuracy can be maintained I construct an anchorman bolt by the griddle and strike concrete. A left photograph is an anchorman frame.
	The root of a steel frame pillar rolls a steel rod, and strikes concrete. This is important. A left photograph is a rise of the root of a pillar.
	A mold is made so that it may not flow until concrete becomes hard. It is important that there is a crevice between a steel rod and a mold here. When it is the foundation like a photograph, a 6cm wall and a floor are 3cm.
	Then, when is a mold removed? If outside temperature is 20 degrees or more, it will be seven days to the floor fundamentally for four days. If outside temperature is less than 20 degrees, it will be eight days to the floor fundamentally for six days. When striking concrete in the midwinter It is good in hanging a sheet so that the surface may not freeze.
	Concrete kneads cement, a gravel, and sand with water, and makes them. With strong concrete, it kneads with water there is much cement and few. Various concretes also have a kind. Important places, such as the foundation That in which concrete intensity is not crushed by 210kg (per 1cm angle). Garage etc. What is not crushed by 180kg (per 1cm angle) by concrete intensity is used. Since it has written to the delivery-of-goods check of a raw contest vehicle if anxious, it can check.
	Hard concrete is good. Hardness is understood in the number of a slump. general -- a slump -- 15-18 -- it is sentimental This is also written to the delivery-of-goods check of a raw contest vehicle.