The factors of effect rolls reduction of consumption on pack rolled sheet are analysed,concrete measure of rolls reduction of consumption from rolls maintenance,springing steel inclusion iron,roll crown curves and so on are introduced.

Simulate experimental study on bending bearing capacity of the colour steel sandwich panel;

The characteristics and application of colour steel sandwich panels with different core materials and different plate types are introduced.

This article describes the use and construction technology for small block of steam pressed aerated concrete and sandwich panel used in direct storey increasing project.