The CTE allows this glass to be used when there are slopes of less than 0.55mm.

According to the Technical Building Code, in the Basic Document for Usage and Accessibility Safety (CTE-DB-SUA), in article 1.3, Impact with fragile elements, there are some characteristics that the glass must comply with.

The glass present in areas with a risk of impact with glass surfaces that do not have a protective barrier in accordance with section 3.2 of SUA 1, will be classified as X(CTY)Z provisions. This classification is determined by the UNE EN 12600:2003 standard and its parameters will comply with what is established in table 1.1.

Table 1.1. Value of the X(Y)Z parameters according to the difference in height.
Difference in height at both sides of the glass surface. X Value of the Y parameter Z
Greater than 12m Anyone B o C 1
Comprising between 0.55 and 12m Anyone B o C 1 ó 2
Less than 0.55m 1, 2 ó 3 B o C Anyone

The Z parameter is the one that indicates that type of break in the glass and for slopes that are less than 0.55m. It accepts any type of break (so breaks in monolithic toughened glass are included).

For the remaining cases, the break must be in the laminated glass type (toughened laminated glass or laminated annealed glass), without releasing fragments that could cause physical damage to people.

This standard only affects structural elements and assembly kits of structural elements (nuts and bolts, metal plates, etc.). In the case of the railings, as they are not a structural element in themselves, this UNE does not apply to them.

(Source: CAT-COACM)

The locations or places where there is a possibility of children under 6 being able to climb the railing and fall to the other side anti-climb railings are likely to be used. Following this point, those who wrote the standard and the comments in the DB SUA consider that in regard to uses in hospitals or offices the presence of unaccompanied children under 6 is not frequent. Because of this, only section b) is mandatory, and not section a) ("avoid the possibility of climbing the protective barriers") and the distance between the bars, whether horizontal or vertical could be 15cm, greater than the 10cm that is considered the limit for a child to put their head between and get stuck.

(Source: CAT comments based on the Basic Document for Usage and Accessibility Safety (SUA) with comments (p. 16).

A handrail bracket anchored to the wall of a staircase does not have a minimum load requirement. In the case of a handrail on a railing, it has to comply with the same aspects as the legislation.

The quality of concrete is defined by its characteristic compressive strength (fck) measured in test cubes and test cylinders respectively when it is 28 days old.

Additionally, the concrete at the anchor point can be compressed or prestressed. This information is important when choosing the anchor. The state and quality of the concrete is defined by the designer in accordance with the legislation in force in each country.

Concrete nomenclature
The nomenclature used for naming concrete in the Eurocodes differs from that used by the Spanish Structural Concrete Legislation (EHE). The Eurocode nomenclature, taken from the European standard EN-206 (Spanish version: UNE EN-206:2008) consists of a capital C followed by the relation of two figures, the first, its compressive strength in N/mm2 in a test cylinder (15cm diameter, 30cm height); the second, its compressive strength in a test cube (150mm side), following section in ENV 206. Remember that the strength in the test cylinder is the one used in EHE. For example, C20/25 would correspond to a compressive strength concrete in a test cylinder ( fck 20 N/mm2 ) and ( fck = 25 N/mm2) in a test cube.

Source: General concepts of mixed structures (

Compressive strength class Minimum characteristic strength in f ck cylinders, cyl Minimum characteristic strength in fck,cubes, cub
C8/10 8 10
C12/15 12 15
C16/20 16 20
C20/25 20 25
C25/30 25 30
C30/37 30 37
C35/45 35 45
C40/50 40 50
C45/55 45 55
C50/60 50 60
C55/67 55 67
C60/75 60 75
C70/85 70 85
C80/95 80 95
C90/105 90 105
C100/115 100 115

No. There is no correlation between magnetism and resistance to corrosion in the applications that we normally use stainless steel.

(Source: Technical Bulletin No5 - ArcelorMittal)

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