Usually the door type steel pipe frame scaffolding erection height is limited to 45m, after taking certain measures can reach about 80m. The construction load is generally 1.8kN/㎡, or 2kN/㎡ for the concentrated load in the span of the scaffolding plate.

Construction door type frame scaffolding is made of ordinary q235 steel pipe material made of tool-type standard parts, combined at the construction site. Its basic unit is a pair of door frame, two pairs of scissor braces, a pair of horizontal beam frame and four articulators combined. Several basic units are then stacked vertically through the join pin and buckled with arm buckles to form a multi-layer frame scaffolding. In the horizontal direction, reinforcement bars and horizontal beam frames are used to make adjacent units into a whole, together with inclined ladders, railing posts and crossbars to form an external scaffolding with upper and lower steps connected.

Door steel pipe scaffolding is one of the most common scaffolds used internationally today.

  Advantages.

  (1) standardized geometry of portal steel pipe scaffolding.

  (2) reasonable structure, good stress performance, full application of the application of steel strength, high load-bearing capacity.

  (3) easy to install and dismantle in construction, erection efficiency, labor-saving, time-saving, safe, reliable, economical and applicable.

  Defects.

  (1) frame size without any flexibility, any change in the size of the frame should be replaced with another type of door frame and its accessories.

  (2) Cross bracing is easy to break at the middle hinge point.

  (3) heavy stereotyped scaffold plates.

  (4) more expensive.

  Conformity.

  (1) construction of shaped scaffolding.

  (2) for the support frame of the sorghum and slab frame

  (3) construction of live open working platform.

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