How many classes of temporary parapet are there?


Question by: Ileana Martino | Last updated: December 3, 2021

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The UNI EN 13374 standard divides prefabricated provisional parapets into three classes: A, B and C.

When can a Class C provisional railing be used without height imitation?

Class C can be used: up to inclinations of 45 °, without limiting the fall height; up to inclinations of 60 ° if the fall height does not exceed five meters “.

When is the parapet needed?

When should a parapet be installed? Work platforms and means of access to workplaces, for example stairs, must be protected by a fixed parapet if the fall height exceeds 500 mm (figs. 1, 4, 5, 6).

What must be the height of the parapets of the last deck?

The height of the parapet must be at least 95 cm. (instead of 1 m.) with respect to the walking surface.

What is the toe board used for?

Along the ramps and landings of the fixed stairs under construction, up to the installation of the railings, normal parapets with toe boards must be kept, rigidly fixed to existing structures.

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What is the draft of a scaffolding?

The row of the internal and external upright connected by the crosspieces is defined as “drawn”; on the other hand, the “field” is the part of the scaffolding between two consecutive ducts. Fixed scaffolding Page 12 Modulo: the surface between two consecutive uprights with the work surface and the one immediately above.

When should scaffolding be used?

Scaffoldings are collective, temporary protection works, or structures built on a temporary basis in order to carry out maintenance and building recovery works. Scaffolding is used in the construction of works at height, i.e. at a height of at least 2 meters from the ground.

What must be the height of the parapets on the eaves?

03 What must be the height of the parapets on the eaves? 1.20 m on the eaves side and 1 m on the sloping side.

What is the minimum height of the terminals of the last deck with respect to the projection of the eaves line?

Each pipe must be fixed by at least two joints and must be installed in such a way as to cover the entire length of the joint itself. The height of the uprights must exceed by at least m. 1.20 the last deck or the eaves level.

When should the under bridge be placed?

Literally it is a plank that is placed under a bridge in scaffolding and scaffolding for safety. … The underbridge can be omitted for suspension bridges, loading towers, cantilever bridges or when maintenance and repair work lasting no more than five days is carried out.

How many steps without parapet?

In industrial and commercial buildings and in factories not open to the public, the following rule applies: A parapet must be mounted from a drop height of 1 m or on stairs with more than four steps.

What is the parapet for?

In a building, the parapet (or balustrade) is a protective element, which serves to prevent people or objects from falling into the void from a balcony or terrace and in any place where there are differences in level between different floors.

How high should a railing be?

BALCONIES AND TERRACES The parapet must have a minimum height of 100 cm. and be uncrossable by a 10 cm sphere. in diameter. To allow the change of direction, balconies and terraces must have at least one space within which a circumference with a diameter of 140 cm can be written.

When should the valance be placed?

In general, the valances must be placed for the entire front subject to the works, and for a height of no less than four linear meters with respect to the road level.

How many types of safety nets are there?

The safety nets are divided into 4 systems called S, T, U, V, which differ from each other for the support frame of the edges and for horizontal or vertical use. They differ in the shape they take once installed and in the technique of installation.

How high must the scaffolding be?

The height of the uprights must exceed the last deck by at least 1 20 m; 1.20 m the last deck; from the inside of the uprights, struts and toe boards must be applied to protect only the workers who work on the last deck.

What is the maximum permissible load on a scaffold deck?

1 deck with an operating load of 300 kg / m2 – n. 2 decks with a working load of 150 kg / m2 – n. 4 planks of planking, with own weight per shelf, of 30 Kg / m2. The overall overload in vertical projection evenly distributed is therefore 720 kg / m2.

How do you Anchor a scaffold?

Lgs 81/2008 article 125 paragraph 6, the anchors must be made at least every two scaffolding floors and every two decks. This provision is more precautionary than the indication contained in many authorization booklets which prescribe the construction of an anchor every 22 m2.

When is it necessary to draw up the PiMUS?

The PiMUS must be built whenever there is a need to set up a fixed metal scaffolding equipped with a ministerial authorization booklet, regardless of its size.

Who has to do the PiMUS?

As regards the drafting of the PiMUS, article 136 of Legislative Decree 81/08 provides that, in the work at height, the employer of the company that assembles and disassembles the scaffolding will “draw up by means of competent person a plan for assembly, use and disassembly (Pi.

What are the advantages of the prefabricated frame scaffolding system?

The “prefabricated frame” system is presented in the two structural schemes of portal and acca with two types of connections: pins and bushings. It does not have the same flexibility as the previous system, but for linear and non-complex architectural structures it can be a valid alternative to the pipe and joint system.

How is the area of ​​a scaffolding calculated?

Normally it is measured in vertical projection from the last parapet to the base as a height, and as a base the width of the same considered in whole modules.

What documents must always accompany the installation of a scaffold?

Construction site documentation: scaffolding and loading docks

  • Booklet and ministerial authorization.
  • Scaffolding Assembly, Use and Disassembly Plan (Pi.MUS)
  • Executive drawing of the scaffolding.
  • Project (executive drawing with calculation report)
  • Control Register.

What is the scaffolding for?

Scaffolding is usually made for the construction or renovation of buildings. In this case, collective protection devices against falls from a height are considered.

What types of scaffolding are there?


We have three types of scaffolding: prefabricated frame scaffolding, tube and joint scaffolding and prefabricated post and transom scaffold, better known as multidirectional.


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