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This document specifies methods to determine the durability of bondings, prepared by means of adhesive materials (e.g. adhesive tapes and adhesive masses), for the establishment of airtight layers under climatic conditions representative for indoor environments based on test methods with and without ageing.
The methods provided in this document are neither suitable for a short time evaluation of durability nor can they be applied to in-field testing.
This document excludes test methods for external weathering or UV exposure, even though this might occur during the construction phase.
The following typical applications are distinguished:
— bonding of the overlap of flexible airtightness layers;
— bonding of flexible airtightness layers to construction products and penetrations;
— establishment of airtightness layers by means of sheet materials and adhesive tapes.
This document does not cover test methods for:
— pre-compressed sealing tapes and sealing profiles which will be mechanically secured;
— butyl-based adhesive tapes or adhesive masses;
— sheet joints of wood-based panels or gypsum plasterboards with adhesive masses or filler systems;
— bondings of bitumen membranes or of bitumen membranes to construction products;
— bonding of self-adhesive membranes;
— adhesive masses from reels. Adhesive masses from reels are cured viscoelastic adhesive masses, which are used in the same field of application as adhesive masses.
The tack is not addressed. It does not allow any conclusion on the durability of a bonding.

(1) This document is applicable to the assessment and retrofitting of buildings and bridges in seismic regions, namely as given in a) to c):
a) To provide criteria for the assessment of the seismic performance of existing individual buildings and bridges;
b) To describe the procedure to be followed in selecting necessary corrective measures;
c) To set forth criteria for the design of retrofitting measures (i.e. design, structural analysis including intervention measures, final dimensioning of structural parts and their connections to existing structural members).
NOTE 1 For the purposes of this standard, retrofitting covers both the seismic upgrading (e.g. strengthening or adding a passive system) of undamaged structures and the repair and possible upgrading of earthquake-damaged structures.
NOTE 2 Annex E gives flowcharts for the application of this standard.
(2) Unless specifically stated, prEN 1998-1-1 and prEN 1998-5 apply.
(3) Reflecting the performance requirements of prEN 1998-1-1:2022, 4.1, this standard covers the seismic assessment and retrofitting of buildings and bridges made of the more commonly used structural materials: concrete, steel and composite, timber and masonry.
NOTE Annexes B, C and D contain additional guidance related to the assessment of reinforced concrete, timber and masonry structures, respectively, and to their retrofitting when necessary.
(4) This standard is intended for the assessment of individual structures, to decide on the need for structural intervention and to design the retrofitting measures that may be necessary. It is not intended for the vulnerability assessment of populations or groups of structures in seismic risk evaluations for various purposes (e.g. for determining insurance risk, for setting risk mitigation priorities, etc.).
(5) This standard provides (in its material-specific Clauses 8 to 11) criteria for the verification of the more common retrofitting techniques currently in use.
(6) This document gives specific rules for the assessment and retrofitting relevant to existing buildings and bridges of consequence classes CC1, CC2 and CC3, as defined in EN 1990:2023, 4.3.
(7) Although the provisions of this standard are applicable to all common categories of buildings and bridges, the seismic assessment and retrofitting of monuments and heritage structures often requires different types of provisions and approaches, depending on the nature of the monuments.
1.2 Assumptions
(1) The assumptions of prEN 1998-1-1:2022, 1.2, are assumed to be applied.
(2) The provisions of this standard assume that the data collection and tests are performed by experienced personnel and that the engineer responsible for the assessment, the possible design of the retrofitting and the execution of work has appropriate experience of the type of structures being upgraded or repaired.
(3) Inspection procedures, checklists and other data-collection procedures should be documented and filed and should be referred to in the assessment/design documents.

(1) This document is applicable to the seismic design of on-ground and elevated silos, on-ground, elevated and underground tanks, above-ground and buried pipeline systems, towers, masts and chimneys and ancillary elements attached to the aforementioned structures or in industrial facilities.
(2) Unless specifically stated, EN 1998-1-1:—2, and EN 1998-5:—4 apply.
(3) prEN 1998-4 is applicable in complement to the other relevant Eurocodes.
NOTE This document contains only those provisions that, in addition to the provisions of the other relevant Eurocodes, are used for the design of new structures, as listed in (1), in seismic regions. prEN 1998-4 complements in this respect the other Eurocodes.
1.2 Assumptions
(1) The assumptions of EN 1998-1-1:—2, 1.2, are assumed to be applied.
(2) It is assumed that the changes in a) and b) will not take place during the construction phase or during the subsequent life span for all structures covered by prEN 1998-4, unless proper justification and verification is provided:
a) substantial changes in the structural systems, supporting structures or attached ancillary elements listed in 1.1 (1);
b) substantial changes of masses or mass distribution. This includes, in particular, changes in production, such as specific changes of filling loads, filling states and ancillary elements.

(1) This document is applicable to the design and verification of new buildings and temporary structures in seismic regions. It gives specific rules for the design and verification relevant to buildings of consequence classes CC1, CC2 and CC3, as defined in EN 1990:2023, 4.3.
NOTE The assessment and retrofitting of existing buildings is covered in prEN 1998-3.
(2) Unless specifically stated, prEN 1998-1-1 and prEN 1998-5 apply.
(3) EN 1998-1-2 is applicable in complement to the other relevant Eurocodes.
NOTE This document contains only those provisions that, in addition to the provisions of the other relevant Eurocodes, are used for the design of new buildings and temporary structures in seismic regions. prEN 1998-1-2 complements in this respect the other Eurocodes.
1.2 Assumptions
(1) The assumptions of prEN 1998-1-1:2022, 1.2 are assumed to be applied.