COLUMN SHOES HPKM, PPKM, PEC

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1 COLUMN SHOES HPKM, PPKM, PEC Version 9/2007 (Update 7/2009) Replaces brochure /2006

2 HPKM, PPKM, PEC -column shoes Benefits of Peikko -column joints Saves time, costs and materials Easy and fast adjustments of straightness and height of the column without packing No need for extensive reinforcement or mould building Doesn t need support during installation The joint is stiff immediately after installation The foundation level can be higher compared to socket joint Bolt connection doesn t require in-situ welding Peikko benefits reliable: passed demanding test program competitive price and delivery time economical and easy to use in designing, manufacturing and installation of the elements

3 CONTENTS Version 9/2007 (Update 7/2009). DESCRIPTION OF THE SYSTEM DIMENSIONS AND MATERIALS...5. MANUFACTURING...6. Manufacturing method 6.2 Quality control 6 4. CAPACITIES APPLICATION Limitations for application Design principles The concrete cover thickness Column s reinforcement Joining to foundations and column to column connections 4 5. Minimum column sizes using standard column shoes Floor height columns Special column shoes Column shoes on an integrated steel plate 5 6. INSTALLATION Installation tolerances Installation to the mould 6 6. Installation of the column shoes 7 7. USING PEIKCOL -SOFTWARE TO CALCULATE THE CAPACITY OF THE COLUMN CONNECTION Using the software 8

4 COLUMN SHOES. DESCRIPTION OF THE SYSTEM Peikko HPKM, PPKM and PEC column shoes are fastening items which allow moment stiff extensions and connections between prefabricated columns and for example foundations. All the forces on the column are transferred with column shoes and bolts to the bearing structure, for example to the foundation. A prefabricated column is fixed to anchor bolts which are cast into the base of the structure. Fixing is achieved with nuts and washers attached to the anchor bolts. It is also possible to set the column at the correct height level and vertical position. The joint between column base and structure below should be grouted as soon as possible after installation. After that the connection parts and grouting will work as reinforced concrete structure. The number of column shoes in the column depends on the dimensions of the column, forces on the column, concrete grade and type of column shoe used. Usually four column shoes are enough to create a moment stiff connection. Figure. Column shoes and anchoring bolts in column connection. 4

5 Version 9/2007 (Update 7/2009) 2. DIMENSIONS AND MATERIALS Materials and standards: Plates S55J2+N SFS-EN 0025 Ribbed bars A500HW SFS 25 B500B pren 0080-:999 Table. Dimensions [mm] and weights [kg] of the HPKM column shoes. HPKM 6 HPKM 20 HPKM 24 HPKM 0 HPKM 9 tolerances B , -0 C , -0 H E ± H ± 0 B t X ø E C t Ø , -0 X weight colour yellow blue grey green orange Table 2. Dimensions [mm] and weights [kg] of the PPKM column shoes. PPKM 6 PPKM 9 PPKM 45 PPKM 52 tolerances B , -0 H 45 C , -0 E ± H ± 0 t B t ø E C Ø , -0 weight colour red brown violet white 5

6 COLUMN SHOES Table. Dimensions [mm] and weights [kg] of the PEC column shoes. PEC 24 PEC 0 PEC 6 tolerances H B , -0 C , -0 E * ± H ± 0 t Ø , -0 B t X weight X E C color light blue black red * Note! Distance from edge differs from PPKM MANUFACTURING. Manufacturing method Plates Ribbed bars Welding Flame and mechanical cutting Mechanical cutting MAG by hand or with a robot Welding class C (SFS-EN 2587).2 Quality control The quality control involved in producing the steel parts conforms to the requirements set by the Finnish Building Codes. Peikko Finland Oy is under the Inspecta Certification for quality control. Column shoes have certified product declarations confirmed by the Concrete Association of Finland. Products are marked with the mark of Inspecta, the emblem of Peikko Group, the type of the product and year and a week of manufacturing. 4. CAPACITIES The capacities in table 4 are according to the Finnish Building Codes. If you require capacities according to other regulations, please contact Peikko s technical support. The capacities of the joints are related to the bolt used. The capacities of the column shoes can be measured with PeikCol dimensioning program. Table 4. Capacities of the column shoes [kn]. The capacity of the joint is according to the lower structural class. column shoe bolt RL RL 2 concrete grade K40- K40-2 ETA HPKM 6 HPM HPKM 20 HPM HPKM 24 HPM HPKM 0 HPM HPKM 9 HPM PPKM 6 PPM PPKM 9 PPM PPKM 45 PPM PPKM 52 PPM PEC 24 PPM PEC 0 PPM PEC 6 PPM PKKM 6 PPM PKKM 45 PPM PKKM 52 PPM

7 Version 9/2007 (Update 7/2009) 5. APPLICATION 5. Limitations for application The capacities of the column shoes have been calculated for static loads. In the case of dynamic and fatigue loads, greater safety factors have to be used individually for each case. If the application conditions are below 20 C, it is necessary to consider using plates with better cold impact resistance Column s reinforcement The space required by casting boxes has to be taken into account when designing the length of column s reinforcement. The lower end of the column above the casting boxes is reinforced as shown in chapters EC 2 requires separate stirrups for the splice area of the main bars. 5.2 Design principles The joint durability during the erection should be checked. It can be checked with PeikCol dimensioning program. The position of the column shoes and the thickness of grouting concrete define the height level of the bolt from the surface of the concrete. For columns which are installed only on bolts, the bolts should be calculated for the bending and buckling caused by wind load and dead load. If the size of the bolt is not sufficient, bigger column shoes and bolts must be used. The grouting of the joints should be done as soon as possible after erecting the prefabricated columns The concrete cover thickness The fire-resistance period and environment class, in which the column shoe is situated, defines the concrete cover thickness according to local regulations. The concrete cover thickness is mm in HPKM column shoes, 45 mm in PPKM column shoes and mm in PEC column shoes when the column shoes are located at the corners of the column. A greater concrete cover thickness can be achieved by moving the column shoe closer towards the centre of the column. Location of the foundation bolts have to be presented in the foundation drawing. 7

8 COLUMN SHOES Details for additional reinforcement with HPKM column shoes HPKM 0 shown in the pictures. We recommend that reinforcement for splices is done according to EC 2 (9.5. and ) lb lb Main bars (according to plans) 8

9 Version 9/2007 (Update 7/2009) 4 lb Main bars (according to plans) Table 5. The required stirrups for HPKM 6-9 column shoes and the minimum length of l b (U-stirrup s bar above column shoe s side plate). HPKM 6 HPKM 20 HPKM 24 HPKM 0 HPKM 9 U-stirrups 4 T6 4 T6 4 T6 4 T6 4 T8 U-stirrups for middle shoes / pair 2 2 T6 2 T6 2 T6 2 T6 2 T8 stirrups 2 T8 2 T8 2+ T8 2+ T8 2+ T0 b a b a middle stirrups 4 2 T8 2 T8 2+ T8 2+ T8 2+ T0 l b T = A500HW (or corresponding) 9

10 COLUMN SHOES Details for additional reinforcement with PPKM column shoes PPKM 9 shown in the pictures. We recommend that reinforcement for splices is done according to EC 2 (9.5. and ) lb lb Main bars (according to plans) 0

11 Version 9/2007 (Update 7/2009) Table 6. The required stirrups for PPKM 6-52 column shoes and the minimum length of l b (U-stirrup s bar above column shoe s side plate). lb 4 2 Main bars (according to plans) 4 PPKM 6 PPKM 9 PPKM 45 PPKM 52 U-stirrups 4 T8 4 T8 4 T8 4 T8 U-stirrups for middle shoes / pair 2 2 T8 2 T8 2 T8 2 T8 stirrups 2+ T0 2+2 T T T2 a b* a b c c middle stirrups 4 2+ T0 2+2 T T T2 l b 500 mm 500 mm 500 mm 500 mm T = A500HW (or corresponding) *Measure b is to the middle of reinforcement bundle or single bar

12 COLUMN SHOES Details for additional reinforcement with PEC column shoes PEC 6 shown in the pictures. We recommend that reinforcement for splices is done according to EC 2 (9.5. and ) lb lb Main bars (according to plans) 2

13 Version 9/2007 (Update 7/2009) 4 lb Main bars (according to plans) Table 7. The required stirrups for PEC 24-6 column shoes and the minimum length of l b (U-stirrup s bar above column shoe s side plate). PEC 24 PEC 0 PEC 6 U-stirrups 4 T6 4 T6 4 T8 U-stirrups for middle shoes / pair 2 2 T6 2 T6 2 T8 stirrups 2+ T8 2+2 T8 2+ T0 a b* a b middle stirrups 4 2+ T8 2+2 T8 2+ T0 l b 00 mm 00 mm 500 mm T = A500HW (or corresponding) *Measure b is to the middle of reinforcement bundle or single bar

14 COLUMN SHOES 5.2. Joining to foundations and column to column connections Table 8. The expansion of the Δ min [mm] and splitting stirrups. Ash concrete grade (column) concrete grade (foundation) the bolts of the tension side yield Δ cross section compressed Δ diametric reinforcement (A500HW or corresponding) Ash > A [mm 2 ] K40- K0-2 0, x H 0,24 x H A = B x H / 40 Ash K50- K0-2 0,26 x H 0,4 x H A = B x H / 240 H K60- K0-2 0,8 x H 0,6 x H A = B x H / 70 B K60- K40-2 0,20 x H 0, x H A = B x H / 278 K80- K40-2 0,8 x H 0,6 x H A = B x H / 5 The concrete strength of the lower column, in the column to column connection should be at least the same as the concrete strength of the upper column. 5. Minimum column sizes using standard column shoes Table 9. Standard column shoes in the rectangular column [mm]. HPKM PPKM PEC A b A A b b min Table 0. Standard column shoes in the circular column [mm]. c/c HPKM PPKM PEC A2 A d d min d - 2E c/c = (E from tables, 2 and ) 2 If column shoes must be placed in the smaller column, please contact Peikko s technical support. 4 The centre distances of the anchor bolts for the full capacity are found from Peikko PPM and HPM anchor bolts manual.

15 Version 9/2007 (Update 7/2009) 5.4 Floor height columns By using HPKM 6-9 column shoes with column height HPM bolts the splices needed for the column can be reduced. The bolts also act as the main reinforcement of the column. This way the needed reinforcement materials can be greatly reduced. The bolts are manufactured to the required length Column shoes on an integrated steel plate Integrated steel plate is used if the column shoes are too big for the column s section or the plate is used as a mould. The plate can be made the same size as the column s intersection or just part of it. Figure. Column shoes on an integrated steel plate. Figure 2. Rectangular and circular column with floor height reinforcement. 5.5 Special column shoes Special column shoes might be needed for example in circular columns or on the side of the column as middle shoes. Column shoes can also be made with a integrated steel plate. 5

16 COLUMN SHOES 6. INSTALLATION 6. Installation tolerances Tolerances on the horizontal plane ± 2 mm Figure 4. Separate casting box for the column shoe. 6.2 Installation to the mould The column shoes are placed into the reinforcement and fixed by their bottom plates to the mould s end plate with bolts. There are separate casting boxes available for the types HPKM 6-9 that also enable the shoes to be fastened to the end plate of the mould with provided bolts. These parts are painted by the same colour as corresponding column shoes so that they can be matched easily. The bolt M6, which always comes with a spacer equal to the size of the column shoe s bolt hole, is used for attachment. With the help of the spacer, the shoe can be fixed to the correct place in the end plate. A check list before casting The right type of column shoe is being used column shoes are attached in the right position anchor bars of the column shoe are banded into the main reinforcement casting boxes are in place and filled if necessary A check list after casting no changes has occurred in shoe position shoe has not rotated possible joint casting tubes are not filled with concrete casting boxes and excess concrete has been removed 6

17 Version 9/2007 (Update 7/2009) 6. Installation of the column shoes The column is installed at the proper level either by placing it directly on the bolts or by using steel plates under the column. After the bolts have been tightened, for example with ring spanner, the crane can be detached from the column. The installation must be done according to the erection plan. Installation instructions can be found also in Peikko PPM and HPM anchor bolts manual. After the column is installed at right height and position, and the nuts are tightened, the joint can be casted by following instructions from concrete provider. The concrete must be non-shrinking type and match plans. The grouting mortar strength must be at least 70% of the needed concrete grade of the column. Table. Installation tolerances and the anchoring bolt s height level from the surface of concrete when HPKM, PPKM and PEC column shoes are used. column shoe installation tolerance T connecting bolt installation tolerance T location tolerance of bolt group ±0 mm grouting bolt s height from the casting surface installation tolerance for the bolt T Figure 5. The joint can be grouted for example with pressure vessel. HPKM 6 HPM ± HPKM 20 HPM ± HPKM 24 HPM ± HPKM 0 HPM ± HPKM 9 HPM ± PPKM 6 PPM ± 4 PPKM 9 PPM ± 4 PPKM 45 PPM ± 4 PPKM 52 PPM ± 5 PEC 24 PPM ± PEC 0 PPM ± PEC 6 PPM ± 4 7

18 COLUMN SHOES 7. USING PEIKCOL -SOFTWARE TO CALCULATE THE CAPACITY OF THE COLUMN CONNECTION With PeikCol dimensioning software the capacity of column connection can be easily and quickly calculated and verified. The software can be freely downloaded from Peikko s website 7. Using the software First, determine the design values of forces in the column joint at the joint level. N d = design value of normal force [kn] M d = design value of bending moment [knm] The additional bending moment caused by eccentrical normal force must be added to the design value of bending moment. Choose used materials. Choose the shape of cross section and input the dimensions. Choose desired column shoe type. Input the design forces of the joint. Also 2-axis bending moment can be checked. Normal force is given as positive value when there is compression in the joint. 6. Calculate the capacity of the joint by clicking the calculator -icon. 7. Compare the given reference point (Nd, M d ) with the P i -capacity curve of the bolts. If the reference point remains inside of the capacity curve, the chosen joint connection is acceptable. 8. The capacity of the joint during erection situation can be verified the following way: Choose Erection situation.. from Dimensioning pulldown menu. Choose Fixed for the buckling length of the bolt. Calculate and input the design values of forces for installation situation. Click the Calc -button, and the software will calculate the utilization rate. If the rate remains under 00%, the chosen column shoes are acceptable. More information about the PeikCol from Peikko s technical support. Figure 6. PeikCol -dimensioning software. 8

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20 Peikko Group