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BS 8297:2017 – TC:2020 Edition

BS 8297:2017 – TC:2020 Edition

$258.95

Tracked Changes. Design, manufacture and installation of architectural precast concrete cladding. Code of practice

Published By Publication Date Number of Pages
BSI 2020 161
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PDF Catalog

PDF Pages PDF Title
102 Foreword
104 Introduction
105 1 Scope
2 Normative references
108 3 Terms and definitions
110 4 Materials and components
4.1 Customer requirements
111 4.2 Specifications for materials and components
112 4.3 Steel
Table 1 — Recommended grades of austenitic or Duplex (Austenitic/ferritic) stainless steel used for fixings
113 Table 2 — Recommended grades of fasteners
114 4.4 Materials for jointing and pointing
4.5 Flashings, weatherings and cavity trays
4.6 Coating agents
115 5 Design of cladding units
5.1 General
5.2 Structural design
116 5.3 Thickness of concrete cover to reinforcement
117 5.4 Fire-resisting wall units
5.5 Support conditions and bending moments
119 Figure 1 — Assumptions for design of units and corbels/brackets
120 5.6 Sizes of units including thickness
5.7 Movement and tolerances
121 5.8 Dimensional stability
5.9 Accommodation of dimensional changes
122 Table 3 — Coefficients of thermal expansion of buildings materials
Table 4 — Extreme temperatures of UK structures
124 Table 5 — Rate of shrinkage of concrete (as a percentage of its potential)
5.10 Other factors affecting design
126 5.11 Passive fire protection to resist the spread of fire
5.12 Signs and attachments to cladding units
127 5.13 Thermal insulation
5.14 Acoustic properties
6 Position and detail of joints
6.1 General
128 6.2 Movement joints
6.3 Compression joints
6.4 Sealed joints
129 6.5 Open drained joints
130 Figure 2 — Examples of jointing details
131 Figure 3 — Open drained joint with plain baffle
6.6 Impregnated foam sealing strips and sealing strips
132 7 Support and attachment of units to the structure
7.1 Support
7.2 Methods of attachment
7.3 Design of fixings
133 Figure 4 — Typical restraint fixing to concrete structure — vertical section
Figure 5 — Typical restrain fixing to steel structure — plan
136 8 Surface finish of cladding units
8.1 Precast concrete
137 8.2 Stone‑faced units
138 Figure 6 — Typical details of fixing pins for stone faced concrete units
8.3 Reconstructed stone faced units
8.4 Brick‑faced units
139 8.5 Tile and brick slip faced units
8.6 Finishes sample and inspections
140 9 Manufacture
9.1 General
9.2 Casting, curing and inspection
9.3 Tolerances and accuracy
Table 6 — Permissible deviations in the manufacture of cladding units
141 9.4 Removal of cast concrete units from moulds
9.5 Marking
10 Handling and transportation of cladding units
10.1 Handling
10.2 Design of lifting points
142 10.3 Protection against damage
10.4 Storage
10.5 Transportation of units to the site
11 On‑site erection and fixing
11.1 General
143 11.2 Storage of materials on site
11.3 Erection of cladding units
145 11.4 Bedding, jointing and sealing
11.5 Accuracy of erection
146 11.6 Final fixing
11.7 Protection of finished work
147 11.8 Site repairs
11.9 Cleaning on completion of work
148 12 Performance testing of cladding units
12.1 Test procedures
150 12.2 Test requirements
151 13 Inspection and maintenance
13.1 General
13.2 Cracks and crazing
152 13.3 Joints
13.4 Joint seals
13.5 Surface cleaning
13.6 Coating agents
154 Annex A (normative)  Checklists for the exchange of information
157 Bibliography

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BS 8297:2017 - TC
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