The case is a spiral staircase ladder birds or bend. Construction steps, as follows:1. from the construction, writing down the ladders girth image on the actual construction site. The distance between the floors is equal to the distance of a half circle of stairs.2. measure the height between floors calculate check of the ball stages. The amount of sleep and use high balls to fit the location.3. the width between the outer-lying to the child sleeping inside, depending on the degree of curvature of the stairs. Bring the entire outer perimeter distance (AG) and inside (CF) taken divided by the number of use. the width of the child sleeping inside and out.4. draw a line out from the center point, RADIUS circle is equal to the amount of use 14 lines.5. assemble the ladder by abdominal height formwork during abdominal ladder must be equal. Which is essentially the same as General belly formwork stairs?6. assemble the side stairs both outside and inside, and then use the wood-beamed ceilings, thick anchor.7. use the sleeping child and Scribble beside the side formwork, both outside and inside.8. steel ladder by building and generate a handsome step use.9. when pouring concrete is done. Customise sleeping child, smooth and level before removing the formwork, concrete curing should continuously for at least 7 days.
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