Weldable hot rolled ribbed steel bars A500SAS with nominal diameters of 20, 25 and 32 mm.

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(Unofficial translation) DECISION ON TYPE APPROVAL by THE MINISTRY OF THE ENVIRONMENT Dno: 1(2) Date of issue: 04.10.2006 Valid up to: 31.12.

1 (Unofficial translation) DECISION ON TYPE APPROVAL by THE MINISTRY OF THE ENVIRONMENT Dno: 1(2) Date of issue: Valid up to: On the basis of 148 of the Land Use and Building Act (231/2003) and considering the regulations stated in Chapter 4 of the Act on the approval of construction materials (230/2003) the Ministry of the Environment has granted the following type approval. PRODUCT APPLICANT MANUFACTURER SCOPE OF APPROVAL Weldable hot rolled ribbed steel bars A500SAS with nominal diameters of 20, 25 and 32 mm. Stahlwerk Annahütte Max Aicher GmbH & Co, KG, Hammerau, Germany Stahlwerk Annahütte Max Aicher GmbH & Co, KG, Hammerau, Germany This approval verifies that the Product complies with the level of requirement stated in the Finnish Building Code regarding its strength when used as reinforcing bars in concrete structures. TERMS OF APPROVAL Reinforcements shall be designed according to the instructions B4 Betonirakenteet (Concrete Structures) of the Finnish Building Code taking into account the product-specific design values presented in the attached Product Sheet (dated ). The approval does not apply to the use of the Product in fatiguestressed structures. QUALITY CONTROL MARKING REMARKS The quality control of the Product shall comply with the agreement concluded on between the Technical Research Centre of Finland and the Applicant. Product bundles shall be marked using the type approval sign appended to this decision as well as markings containing the product identifier, the manufacturer s name, the bar diameter and the production batch. The manufacturer shall, as necessary, provide the attached product sheet to the building inspector.

2 Dno: 2(2) TIME OF VALIDITY GROUNDS OF APPROVAL The Decision will enter into force on and will be valid until further notice, however, not beyond or until the end of the transition time for the harmonized standard or the technical approval instructions authorizing the use of the CE-marking. This decision annuls the type approval decision issued on VTT Test Reports VTT-S and VTT-S Teppo Lehtinen Jaakko Huuhtanen [stamp and signatures] APPENDICES Type Approval Sign Instructions on Claim for Correction Instructions for Appeal FOR INFORMATION TO VTT, Jukka Kiiskinen P.O.B. 1000, VTT

3 Stahlwerk Annahütte Max Aicher GmbH & Co. KG, Germany PRODUCT SHEET WELDABLE HOT ROLLED RIBBED STEEL BARS A500SAS [stamp] This appendix is a part of the decision issued today by the Ministry of the Environment. Certified in the Ministry of the Environment on October 4, 2006, by Construction Councellor [signature - Jaakko Huuhtanen]

4 1 (7) REINFORCING STEELS. WELDABLE HOT ROLLED STEEL BARS A500SAS TABLE OF CONTENTS 1 AREA OF APPLICATION 2 REFERENCES 3 CHEMICAL COMPOSITION 4 STRENGTH CHARACTERISTICS 5 WELDABILITY 6 SAMPLING AND TESTING 7 GENERAL QUALITY REQUIREMENTS 8 SHAPE AND FORM 9 IDENTIFICATION MARKING 10 SIZE 11 BUNDLE SIZES 12 STORAGE AND TRANSPORTATION OF BUNDLES 13 DIMENSIONING VALUES INFORMATIVE INSTRUCTIONS 1 AREA OF APPLICATION This standard presents the requirements on hot rolled ribbed steel bars A500SAS used for reinforcing concrete structures. 2 REFERENCES SFS 1200 Reinforcement steels for concrete structures. Grades, designation and marking SFS 1201 Steels and units for concrete reinforcement. Attestation of conformity. Requirements and testing SFS 1202 Steel bars for the reinforcement of concrete. Weldability tests SFS 1215 Reinforcing steels. Weldable hot rolled ribbed steel bars A500HW SFS-EN Metallic products. Types of inspection documents SFS-EN ISO Steel for the reinforcement and prestressing of concrete -- Test methods -- Part 1: Reinforcing bars, wire rod and wire EO 361 Use of SFS marking on reinforcement steels and units (SFS-merkin käyttö betoniteräksissä ja raudoitteissa)

5 2 (7) 3 CHEMICAL COMPOSITION The requirements concerning the chemical composition of ribbed steel bars A500SAS are presented in Table 1. Table 1. Chemical Composition C ekv 1) C SI ) Mn P S N 2) Cast analysis Product analysis ) ) C ekv = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15. 2) The nitrogen content may exceed the values stated in the Table if it can be verified that the nitrogen exceeding the limit value has been bound to nitrides using additives, such as Al, Ti, V and Nb. The melt-specific definitions of nitrogen content can be replaced by random inspections and using a reception certificate 3.1 based on these and conforming to the SFS- EN standard. The chemical determination of unbound nitrogen can be replaced by a rebend test pursuant to the SFS-EN ISO standard. A test rod is bent 90 over a mandrel with a diameter D of 6 d for diameters 8-12 mm. The aged rod is then turned 20 backwards. 3) At least 0,15 Si. 4) At least 0,13 Si. 4 STRENGTH CHARACTERISTICS The required results of the strength tests on the ribbed steel bars A500SAS are presented in Table 2. 5 WELDABILITY The reinforcing steels A500SAS are intended to be welded using methods suitable for making welded joints on reinforcing steels presented in the SFS 1251 standard. Ribbed steel bars A500SAS can be jointed and connected to one another by load-bearing and fixing joints that are made using resistance welding methods (spot, flash, butt welding) or arc welding methods (rod or gas arc welding). When arc welding with coated rods is used, usual humidity limitations shall be considered in order to prevent hydrogen from entering the structure of the joint area. Ribbed steel bars A500SAS can be joined to cold rolled reinforcing steels B500K following their weldability instructions. The weldability tests presented in the SFS 1202 standard are made using test rods provided with weld studs. The results shall meet the requirements presented in Table 3. The weldability tests are made using test rods provided with weld studs.

6 3 (7) Table 2. Nominal dimensions, linear density, rib pitch and requirements on strength test results for ribbed steel bars A500SAS. Nominal diameter Nominal cross section Bar linear density Rib pitch Rib surface coefficient Tensile test Bend test 180 Mandrel diameter 1) Yield load 4) Yield stress 2) 3) 4) Ultimate load Ultimate stress 2) 3) Break elongation 3) d mm 20 S mm² m l kg/m nominal c mm 32.0 N 4.0 F eh kn 157 R eh N/mm² 500 F m kn 173 R m N/mm² 550 A 10 A 200mm D mm d d 3.1 d ) A deviation of ±5 is allowed in mandrel diameters 2) Yield stress and ultimate stress are calculated using nominal cross section of bar 3) Required values of yield stress, ultimate stress and break elongation are interpreted as the minimum requirements for the characteristic value (specific value) determined in statistical quality control. 4) If no emphasized yield stress is indicated, F p0,2 or F t0,5 can be determined instead of yield load F eh, and elongation limit R p0,2 or R t0,5 instead of yield stress R eh.

7 4 (7) Table 3. Required results of weldability tests SFS 1202 (test bar with weld studs). Nominal diameter Tensile test Bend test 90 Upper yield force Break force Break elongation Mandrel diameter 1) d mm 20 F eh kn 157 F m kn 173 A 10 A 200mm D mm 10 8 d ) A deviation of ±5 is allowed in mandrel diameters d 10 d TESTING Testing is carried out according to the requirements of the SFS-EN ISO standard. 7 GENERAL QUALITY REQUIREMENTS No such external or internal faults are allowed on reinforcing steel bars that would diminish their strength or their suitability for the intended use in any other respect. The surface of the bars must be clean of grease, paint and other impurities that may weaken bonding between bar and concrete. Only such material that meets the requirements is allowed to be used as raw material for reinforcing. 8 SHAPE AND FORM The ribbed steel bars are round bars with transversal ribs rolled onto two sides of the bar to increase bonding between bar and concrete (Fig. 1). The ribbed steel bars A500SAS have transversal ribs running obliquely on two sides of the bar with an angle (β) of between the lengthwise direction of the ribs and a line that is parallel to the longitudinal axis of the bar. The crosswise ribs end smoothly. The ends of adjacent ribs do not touch each other. The maximum values for rib pitch for the different nominal dimensions are shown in Table 2. The positioning of ribs on the opposite sides of the rod is not restricted in the lengthwise direction of the bar. The transversal ribs on the opposite sides of the bar constitute a screw-like thread.

8 The inclination angle (α) between the side of the transversal rib and the cylindrical part of the bar in a cross section running along the central axis of the bar must average at least 40. The joining corner between the transversal rib and the cylindrical part of the bar is rounded. Instructions concerning the determining of inclination angle (α) are presented in Informative Instructions. The relative rib surface area f R on a plane that is perpendicular to the longitudinal direction of the bar is at least equal to 1/4N. The values for N are given in Table 2. 5 (7) Fig.1 Rib forms 9 IDENTIFICATION MARKING The identifying mark of ribbed steel bars A500SAS on the product is formed by transversal ribs on two sides of the bar having the same angle and constituting a figure resembling a thread. The factory mark (Fig. 2) is formed by the number of transversal ribs between the start and end marks. The rules for marking products of inferior quality are presented in the SFS 1200 standard. Fig. 2 Factory mark SIZE The nominal size (nominal diameter) of ribbed steel bars A500SAS means the diameter of a round bar with a linear density equal to the nominal linear density of the ribbed steel bar. The nominal diameters (d) of ribbed steel bars, their nominal cross sectional areas (S) and linear densities (m l ) with the allowed deviation limits are presented in Table 2.

9 6 (7) 11 BUNDLE SIZE The average weight of a bundle is 2.5 tonnes. 12 STORAGE AND TRANSPORTATION OF BUNDLES Bundles shall be stored and transported so that they do not suffer any such permanent deformations as would complicate their proper use. 13 DIMENSIONING VALUES 13.1 Limit state design Specific strength f yk = 500 N/mm² Partial safety factors and calculated strength of steel: Structure class Partial safety factor of steel γ s 1,10 1,20 1,35 Calculated strength f yd = f yk / γ s 455 N/mm² 417 N/mm² 370 N/mm² 13.2 Inside bending radiuses of bars (RakMK B4, Table 4.1) Nominal Inside bending diameter of bar, minimum diameter of bar d mm Claws, hooks and loops Main reinforcement 12 d (2.5 Ø) 88 (3.5 Ø) 112 (3.5 Ø) Bonding, anchoring and restriction of cracking Bonding coefficient k b (RakMK B4, Chapter ) Bonding state I II Bonding coefficient k b

10 7 (7) Restriction of cracking (RakMK B4, Chapter ) The coefficient k w used in the formula (2.81) for calculating the specific width of crack for ribbed steel bars A500SAS is: k w = INFORMATIVE INSTRUCTIONS O.1 Defining the inclination angle of a transversal rib The inclination angle α of a transversal rib can be defined in various ways in which case, for instance, the following dependency is valid: in which tanα SFS = sinβ tanα ENV, α SFS = inclination angle defined according to the SFS 1215 standard α ENV = inclination angle defined according to the European preliminary standard ENV β = directional angle of transversal rib

11 Appendix Marking of type approved product Type approved products or their packages shall be provided with true-to-shape identifiers according to the illustration below.

TEST REPORT DIN Reinforcing steels Reinforcing steels bars

TEST REPORT DIN Reinforcing steels Reinforcing steels bars TEST REORT DIN 488-2 Reinforcing steels Reinforcing steels bars Report reference No.... : 68.5.53.15.0067.01 Date of issue... : 2015-03-04 Testing laboratory... : TEN-ONE SERVICES CO., LTD Address... :