Part-02 Materials

2 MATERIALS .................................................................................................. 2
2.1 GENERAL ...................................................................................................... 2
2.1.1 Scope 2
2.1.2 References 2
2.1.3 Material Qualities 3
2.1.4 Material Testing 3
2.1.5 Test Certificates 3
2.1.6 Dimensions and Tolerances 3
2.2 SURFACE CONDITION ................................................................................. 4
2.2.1 General 4
2.3 SUBSTITUTION OF MATERIAL OR FORM .................................................. 5
2.3.1 General 5
2.4 WELDING CONSUMABLES ......................................................................... 5
2.4.1 Standards 5
2.4.2 Storage 5
2.5 STRUCTURAL FASTENERS ........................................................................ 5
2.5.1 Ordinary Bolt Assemblies 5
2.5.2 High Strength Friction Grip (HSFG) Bolt Assemblies 5
2.5.3 Foundation Bolts. 5
2.5.4 Cup and Countersunk Bolts 5
2.5.5 Washers 6
2.5.6 Lock Nuts 6
2.5.7 Fastener Coatings 6
2.6 SHEAR STUDS ............................................................................................. 6
2.6.1 General 6
2.7 PROTECTIVE TREATMENT MATERIALS .................................................... 6
2.7.1 Metallic Blast Cleaning Abrasives 6
2.7.2 Surface Coatings 6
2.7.3 Sherardized Coatings 6
2.7.4 Galvanizing Materials 6
2.7.5 Proprietary Items 6

2 MATERIALS
2.1 GENERAL

2.1.1 Scope
1 This Part specifies the materials requirements for structural steelwork.

2 Related Sections and parts are as follows:

This Section

Part 6 Bolting

Section 1 General
2.1.2 References
1 The following standards are referred to in this Part:

BS 4 ............................Structural steel sections, Part 1 1993, Hot-rolled sections.
BS 639 ........................Covered carbon and carbon manganese steel electrodes for manual metal-arc welding
BS 729 ........................Hot dip galvanised coatings on iron and steel articles.
BS 2901 ......................Filler rods and wires for gas-shielded arc welding.
BS 2989 ......................Continuously hot-dip zinc coated and iron-zinc alloy coated steel flat products.
BS 3692 ......................ISO metric precision hexagon bolts, screw and nuts.
BS 4165 ......................Electrode wires and fluxes for the submerged arc welding of carbon steel and medium-tensile steel.
BS 4190 .....................ISO metric black hexagon bolts, screw and nuts.
BS 4320 ......................Metal washers for general engineering purposes.
BS 4395 ......................High strength friction grip bolts and associated nuts and washers for structural engineering.
BS 4929 ......................Steel hexagon prevailing-torque type nuts
BS 4933 ......................ISO metric black cup and countersunk head bolts and screws with hexagon nuts.
BS 4848 ......................Hot rolled structural steel sections
BS 4921 ......................Sherardized coatings on iron and steel
BS 5950 ......................Structural use of steel work in building
BS 6363 ......................Welded cold formed steel structural hollow sections
BS 7079 ......................Preparation of steel substrates before application of paints and related products.
BS 5135 ......................Process of arc welding of carbon and carbon manganese steels
BS 7084 ......................Carbon and carbon-manganese steel tubular cored welding electrodes
BS 7419 ......................Holding down bolts

BS EN 10025 ..............Hot rolled products of non-alloy structural steels-Technical delivery conditions.
BS EN 10029 ..............Tolerances on dimensions, shape and mass for hot rolled steel plates 3mm thick or above.
BS EN 10034 ..............Structural steel I and H sections-Tolerances on shape and dimensions.
BS EN 10051 ..............Continuously hot-rolled uncoated plate, sheet and strip of non-alloy and alloy steels-Tolerances on dimensions and shape
BS EN 10147 ..............Continuously hot-dip zinc coated structural steel sheet and strip-Technical delivery conditions.
BS EN 10163 ..............Delivery requirements for surface conditions of hot rolled steel plates wide flats and sections.
BS EN 10210 ..............Hot finished structural hollow sections of non-alloy and fine grains structural steels.
BS EN 102101 ............Technical delivery conditions

EN 10051 ................... Specification for continuously hot-rolled uncoated plate, sheet and strip of non-alloy steels. Tolerances on dimension and shape
EN 10113 ...................Hot rolled products in weldable fine grain structural steels.
EN 10155 ...................Structural steels with improved atmospheric corrosion resistance. Technical delivery conditions.
2.1.3 Material Qualities
1 Material shall be steel in rolled sections, structural hollow sections, plates and bars and shall comply with the appropriate standard shown in Table 2.1.

2 The steel designations used in this publication are those given in BS 5950.

2.1.4 Material Testing
1 All steel shall have been specifically tested in accordance with the appropriate material quality standard shown in Table 2.1.

2.1.5 Test Certificates
1 The Contractor shall obtain the manufacturer's test certificates and submit them to the Engineer for review.

2.1.6 Dimensions and Tolerances
1 Dimensions and Tolerances shall comply with the appropriate standard shown in Table 2.1.

Table 2.1
Material and Dimension Standards
Form
Material Quality
Dimensions
Dimension Tolerances

U.B. and U.C.

BS 4 : Part 1
BS EN 10034

Joists

BS 4 : Part 1
BS 4 : Part 1

Channels
BS EN 100251
BS 4 : Part 1
BS 4 : Part 1

Angles

BS 4848 : Part 4
BS 4848 : Part 4

Plate and Flats

Not Applicable
BS EN 100293

Structural Hollow Sections
Hot Finished
BS EN 10210-I2
BS 4848 : Part 2
BS 4848 : Part 2

Hollow Sections
Cold Formed
BS 6363
BS 6363
BS 6363

Galvanised Open Sections and Strip
BS EN 10147
Not Applicable
BS 2989

Notes:
1 Material quality requirements for Fine Grain Steels are given in EN 10113 Material quality requirements for Weather resistant grades are given in EN 10155.
2 BS EN 10210-1 contains material quality requirements for Non-alloy and Fine Grain Steels.
3 Tolerances for plates cut from wide strip produced on continuous mills are given in BS EN 10051.
2.2 SURFACE CONDITION

2.2.1 General
1 Steel surfaces when used shall not be more heavily pitted or rusted than Grade C of BS 7079 Part Al.

2 Surface defects in hot rolled sections, plates and wide flats revealed during surface preparation which are not in accordance with the requirements of BS EN 10163 shall be rectified accordingly.

3 Surface defects in hot rolled hollow sections revealed during surface preparation which are not in accordance with the requirements of BS EN 10210-1 shall be rectified accordingly.

2.3 SUBSTITUTION OF MATERIAL OR FORM

2.3.1 General
1 Material quality or section form of components may, with the agreement of the Engineer be substituted where it can be demonstrated that the structural properties are not less suitable than the designed component.

2.4 WELDING CONSUMABLES

2.4.1 Standards
1 Consumables for use in metal arc welding shall comply with BS 639, BS 2901, Part 1, BS 4165 or BS 7084 as appropriate.

2.4.2 Storage
1 Consumables to be stored in the Contractor's works and on the Site, shall be kept in a controlled atmosphere, in accordance with BS 5135. Any drying or baking of consumables before issue shall be carried out in accordance with the manufacturer's recommendations.

2.5 STRUCTURAL FASTENERS

2.5.1 Ordinary Bolt Assemblies
1 Shop and site bolts and nuts shall be to one the following grades:

(a) Grade 4.6 in accordance with BS 4190

(b) Grade 8.8 or 10.9 in accordance with BS 3692.

2 Dimensions, tolerance and threaded length to BS 4190.

3 Refer to Clause 6.2.1 of this Section for bolt/nut combinations.

2.5.2 High Strength Friction Grip (HSFG) Bolt Assemblies
1 HSFG bolt assemblies shall be in accordance with BS 4395.

2 Refer to Clause 6.4.1 of this Section for bolt/nut combinations.

2.5.3 Foundation Bolts.
1 Holding down bolts shall be in accordance with BS 7419.

2.5.4 Cup and Countersunk Bolts
1 Cup and countersunk bolts shall be in accordance with BS 4933.

2.5.5 Washers
1 Metal washers shall be made in accordance with BS 4320 Section 2. Unless otherwise specified, black steel washers to Form E shall be used.

2 Refer to Clause 3.4.6 for washers for holding down bolts.

2.5.6 Lock Nuts
1 Lock nuts shall be in accordance with BS 4929: Part 1.

2.5.7 Fastener Coatings
1 Where specific coatings are required, they shall be provided by the fastener manufacturer.

2.6 SHEAR STUDS

2.6.1 General
1 Proprietary studs used in composite construction shall be the headed type with the following properties after being formed:

(a) minimum yield strength - 350 N/mm2

(b) minimum ultimate tensile strength -450 N/mm2

2.7 PROTECTIVE TREATMENT MATERIALS

2.7.1 Metallic Blast Cleaning Abrasives
1 Chilled iron grit shall be in accordance with BS 7079 Part E2, and cast steel grit shall be in accordance with BS 7079 Part E3.

2.7.2 Surface Coatings
1 Paint materials and other coatings supplied shall be in accordance with the appropriate British Standard or European Standard for the materials.

2.7.3 Sherardized Coatings
1 Sherardized coatings shall be in accordance with BS 4921.

2.7.4 Galvanizing Materials
1 The composition of zinc in galvanizing baths shall be in accordance with BS 729.

2.7.5 Proprietary Items
1 All proprietary items shall be used in accordance with the manufacturer's recommendations and instructions.

END OF PART