The 6T tower crane has three type :stationary ,travelling ,internal climbing.and the main parameters as follows

Freestanding Height	Stationary	39.8m
	Travelling	45m
	Internal climbing	27.5m
The self-road	38.4t   /45t / 38.8t
Max load		6t
Tip load		1.3t
Max radius		55m
Working range		2.9—55m
Mast section		1.6*1.6*3m
Max height		120.8m

Advatage:
1.The dimension is not large ,very suitable to middle scale construction.And it is not require vast space
2.The hositing ,slewing,trovelling is very steady,it has high performance.
3.Easy to operate ,maintence and disassemble.
4.Need of power is not big.So,it is very economical.