Will the door scaffolding norms who knows ah? Can you teach me?
; by erection of the pole row, but also a single row of shelves, double row frame and full house According to the erection of the use, but also can be divided into masonry frame households light Ju Chi angle Gui carrying wool, decoration rack; by erection of the location can be divided into external scaffolding and scaffolding The following small series on a brief introduction to several commonly used steel frame structures and scaffolding structures A scaffolding on the outside of a building or structure is called an outer scaffolding Outside the scaffolding should be put up from the ground, so, also known as floor scaffolding, in general, how high the building, the shelf will take how high Scaffolding can be divided into single row scaffolding and double scaffolding A scaffolding in a building or structure is called a scaffolding The main types of scaffolding are: horse stool-style scaffolding and pillar-style foot scaffolding Tool scaffolding has cantilevered scaffolding, basket scaffolding and hanging lift scaffolding, scaffolding and door steel scaffolding
559 Lightning protection In order to avoid the lightning protection, the main structure of the tower crane, the motor base and the metal shell of all electrical equipment, the metal protection tube of the wire should be reliably grounded and its grounding The resistance should not be greater than 4Ω
Oxygen index greater than or equal to 30 for the B1; oxygen index greater than or equal to 26 for B2.
