The size of frame scaffold is various countries around the world, there are two units adopt the international unit and imperial. Such as English unit width is 4 '1219 type frame (1219 mm), height is 6' 4 "(1930 mm), the international unit width for 1200 & 1219 type frame have spent & have spent mm, height is 1900 mm.

The frame width of scaffolding companies in foreign countries mainly 900, 914, 1200, 914 & have spent & have spent four mm, the size of the frame height a lot, become a system oneself.  

Specifications several production plants in China is not unified, a generic foreign product specifications, also have domestic research units designed a set of system, adopts the inch size, has adopted the international system of units. Such as frame inch size is 1219 mm, the width of the international system of units of 1200 mm, from 1829 mm and 1830 mm respectively, and because the size is different, each other between the frame can't general.

And as the height of the scaffolding frame size has more than eight, connecting pin spacing between also have a variety of size, the cross brace is a wide variety of specifications.

Frame outside of the specifications of the scaffold with raw material of the gantry type scaffold using steel pipe materials and scale has special rules, such as Japan's top standard rules gantry scaffolding parts of rod used for STK - 51 steel raw materials, scale for 42.7 x 2.5 mm, for rod used for STK - 41 steel raw materials, scale for 34.2 x 2.3 mm and?27.2 x 2.0 Mm.