welcome to trussingchina - stage
it is made by two parts:
1) the stage top deck : it is the 18mm thickness plywood (or 18mm thickness transparent glass top)
it is special for the stage use, it is heavy loading weight, skid-proof, water-proof, fire-proof,
2) the stage aluminium frame : it is include the aluminium structure frame, stage leg,
and floor adjustable base ,(it is with 20cm adjustable height when the floor is not on level)

often the stage model is :
1) 1.22m*1.22m for each pcs ( 4ft*4ft for each pcs) , loading weight: 1150KG for each pcs
2) 1.22m*2.44m for each pcs ( 4ft*8ft for each pcs) , loading weight: 1500KG for each pcs
height often from 0.6m-0.8m-1.0m-1.2m adjustable ,
and other height from 0.2m to 2.0m can made by our needs too .

it is the combine stage, moving stage, mobile stage,set up together by pcs and pcs stage ,
so the total size and design can build by your needs,