Fastener type steel pipe scaffold according to JGJ130-2001 "technical specification for construction fastener type steel pipe scaffold safety and bowl JGJ166-2008 type steel pipe scaffold, its to 48 mm steel pipe diameter. Wall thickness of 3.5 mm; The calculation unit weight is 3.841 kg/m; 

Frame scaffolding according to JG13-1999 "door type steel pipe scaffold and JGJ128-2000" the door type steel pipe scaffold safety technical specification for construction of buildings; Its for 42 mm steel pipe diameter and wall thickness of 2.5 mm, the calculation unit weight is 2.435 kg/m.1.406 kg/m less than the former.

2.1.2 engineering, authors used for exterior frame scaffolding erection of steel quantity contrast: (for example)
Fastener type steel pipe scaffold erection per square steel tube is 6.5 meters will be needed, fasteners, 5 set-up per square steel consumption by calculation: = 6.5 * 3.841 + 5 * 3.841 = 29.46 kg/m2.
 
Frame scaffolding, to adopt the door frame combination averages 1.2 cross. A scaffold board, two pairs of cross support bar, composable build-up area is 3.2 m2.

Among them: MF0817 type door frame weighs 13.77 kg/cross;1.83 meters of scaffolding weigh 17 kg/piece;1.83 m cross support bar 4.83 kg/pair
By computing: frame scaffolding, steel consumption per square meter = (13.77 x 13.77 x 1.2 + 17 + 2) / 3.2 = 13.5 kg/m2
Conclusion: the two kinds of scaffolding, steel consumption of per unit area from 15.96 kg/m2. Frame scaffolding section steel ratio of more than 50%. 
2.2 other economic indicators

2.2.1 prolong service life, reduce maintenance costs. 
Common fastener type steel pipe scaffold, steel pipe are paint surface, after the wind and rain erosion and air oxidation, inside and outside is easy to rust. Wall thickness will become thinner, via regular paint and maintenance, the service life of the general in 8 years or so.