fixing anchors inserts rebar couplers lifting systems april 2003

68 Pages·2003·1.74 MB·English

FIXING ANCHORS
INSERTS
REBAR COUPLERS
LIFTING SYSTEMS
APRIL 2003
Productoverview
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Table of contents O
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Page Table of contents NF
General technical information L I
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4 Admissible loads on fixing inserts C
4 Inserts in recessed position NI
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5 Edge and centre to centre distances of boltanchors/fixing inserts (constructive applications) C
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7 New calculation method for short anchors in concrete (CUR 25, 2000, in Dutch). L
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9 Stainless steel R
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9 Specials N
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9 Welding of fixing anchors G
10 Zinc plating of inserts and connectors
10 Thread quality
10 Sizes
10 Updates and changes
11 Mounting
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Fixing anchors and inserts R
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12 Insert VEMO 995 NS
13 Insert VEMO 995-GB D I
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14 Insert VEMO 995-G / 995-A
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15 Insert VEMO 995-DG S
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16 Insert VEMO 1036 O
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17 Insert VEMO 1036-G / 1036-A C
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18 Insert VEMO 1140 A
19 Insert VEMO 1130 G
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20 Insert VEMO 1074-G / 1074-A XI
21 Insert VEMO 1168-G / 1168-A FI
22 Connector VEMO 1550 / 1580
23 Connector VEMO 1651
24 Connector VEMO 1551
25 Connector VEMO 1581
26 Boltanchor 1988
27 Boltanchor 1980 St.st. 303 / 1988 St.st. 316 Ti, class 80
28 Boltanchor 1985
29 Boltanchor 1980-P
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30 Baranchor 1980-S E
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31 Baranchor 1988-S UP
32 Spacer 1554 O
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33 Spacer 1558 R
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34 Baranchor 3010 B
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35 Accessories fixing anchors R
Rebar couplers
37 Baranchor 3010
38 Dowel anchor 2010 / 2016
40 Dowel-in 2020 / 2020-P / 2020-D
42 Specials 2030 / 3030 / 2035 / 2040 / 3016
43 Accessories rebar couplers
Lifting systems
45 General manual lifting products
54 Lifting socket 1200-G St.st. 316 Ti class 80
55 Lifting socket 995-DG
56 Boltanchor 1988/1988 St.st. 316 Ti, class 80 MS
57 Boltanchor 1985 TE
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58 Baranchor 3010 Y
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59 Lifting loop KOLOS 1240 / 1245 G
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60 Lifting loop KOLOS 1260 / Lifter KOLOS 7200
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61 Lifting socket 6400-G (Rd thread) LIF
62 Lifting socket 6500-DG (Rd thread)
63 Lifting loop 7100 / Lifter 7300 (Rd thread)
64 Accessories lifting systems
66 Notes
67 ISO 9002 Quality system certificate
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TI General technical information
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C ADMISSIBLE LOADS FOR FIXING INSERTS.
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L T From the results of extensive tests, which DEMU have carried out on the inserts over a period of many
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R years, it is clear, that figures cannot be determined to give exact load-capacity for each insert. Many
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E considerations, such as strength and the age of concrete, can influence the load-capacity
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considerably.
As a startingpoint for the determination of the admissible static tensile-loads, all the data from the
different reports have been combined. From this, the average values have been determined,
eliminating the extreme values.
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ER The admissible static loads for the fixing inserts are valid for pure pull out or shear load and have a
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D I factor of safety of 3-4 to the average breaking load.
N By “admissible load” we mean the admissible load for static fixing applications.
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S The fixing inserts have to be embedded into the concrete completely.
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H The cross-pin of the inserts type 995-A, 1074-A, 1036-A en 1168-A gives no increase of the
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A admissible load but has to be regarded as an extra safety-measure in case of voids or airpockets.
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N The carrying-capacity of the inserts type 995-G, 1074-G, 1036-G en 1168-G can be increased by
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FI adding a “U” shaped anchor of sufficient length in the cross-hole.
INSERTS IN RECESSED POSITION (see picture 1).
When the inserts are in a recessed position, the use of a protective cap is necessary. An adequate
filling is necessary in order to load the insert properly without loading the concrete.
The use of a torque wrench is recommended in order to prevent unexpected high loads on the fixing
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ER inserts. Torque values and forces can be found in the table below.
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Picture 1
Size Torque (Md) Force (F) Md
M12 8 Nm ± 3.3 kN
M16 17 Nm ± 5.3 kN
S M20 35 Nm ± 8.7 kN
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E M24 53 Nm ± 11.0 kN
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S M30 96 Nm ± 16.0 kN
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General technical information TI
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EDGE AND CENTRE TO CENTRE DISTANCE (FIXING APPLICATIONS) C
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The products, which are used as fixing anchors, can be devided in the following groups: L T
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1 VEMO inserts without cross-pin (not for the stress area except type 1130 en 1140) R
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2 VEMO inserts with cross-pin and boltanchor type 1980-P E
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3 DEMU boltanchors 1980, 1985 en 1988
4 DEMU baranchors type 1980-S, 1988-S en 3010
For the groups 1 and 2:
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The documented admissible loads can be used if: ER
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For pull out loads: the minimim edge distance is 1,5 x L
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(L = total length of the anchor) and the centre to centre distance is N N
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minimum 3 x L. For shear loads: the minimum edge distance is 2,5 x L S
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and the centre to centre distance is 5 x L. H
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Minimum edge distance: 3 x d with a minimum of 50 mm! N
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Reduction factors for small edge distances:
Edge distance N Edge distance V Y = 1.2 Y = 1.4
Rd Rd
2.5 x L 100% 2.5 x L 100% 100% 100%
2.0 x L 100% 2.0 x L 85% 100% 100%
1.5 x L 100% 1.5 x L 65% 78% 91%
1.0 x L 75% 1.0 x L 40% 48% 56% S
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0.5 x L 50% 0.5 x L 15% 18% 21% PL
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When small edge distances/centre to centre distance do occur, the indicated admissible load has to B
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be reduced. The reductionfactors must be applied on both pull out (Nd) and shear load (Vd). See
table above. The reduced admissible load for shear loads in the direction of the edge can be
increased by using additional reinforcement. Following factors are valid in order to increase the
reduced admissible load values:
Straigth reinforcement: Y = 1.2
See table above.
Straigth reinforcement and hairpins (U-shaped): Y = 1.4
The documented admissible loads may not be exceeded. S
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Extra shear reinforcement (hairpins U-shaped) have to be used if the appeared shear load is higher T
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than the reduced admissible load. G S
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The hairpins have to be placed at the upper part of the insert/anchor if the shear load direction is
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towards the edge. LI
The hairpins have to be placed at the bottom part of the insert/anchor if the shear load direction is
opposite to the edge.
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C The documented admissible loads for inserts are valid for both cracked and uncracked concrete
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L T For pull out the following factors can be used for other concrete qualities.
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E Concrete quality B25 B35 B45 B55 B65
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Factor 1.0 1.18 1.34 1.48 1.61
If the centre to centre distance is smaller than 3 x L, the edge distance can be calculated as follows:
centre to centre distance/2 and follow the table for the reduction.
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D I The load must meet following requirements:
N N /N < 1
A Sd Rd
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H N /N + V /V < 1.2
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N Sd Rd Sd Rd
A N = appearing pull out load
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N V = appearing shear load
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Rd
V = admissible shear load
Rd
Becauseoftheminimumrequiredsizesandtheabsenceofaclear“anchoringlength”,theanchorsof
group1and2cannotbecalculatedaccordingthenewDutchcalculationmethodCUR25(seegroup3).
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General technical information TI
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For group 3: C
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NEW CALCULATION METHOD FOR SHORT ANCHORS IN CONCRETE (CUR 25, 2000) C
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Because of new international developments in “Fastening”, the Dutch authorities have decided to R
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adapt their calculation rules to these international standards. The following international documents E
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are used:
– CEB Bulletin 233 “Design of Fastenings in Concrete”-1997– ETAG "Guideline for European
– Technical Approval of Metal Anchors for Use in Concrete"-1997
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The calculation method is valid for the concrete qualities B25-B65 and determines the different failure R
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mechanisms like: N
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– steel failure N
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– pull out S
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– concrete cone failure H
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– concrete splitting failure
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– concrete blowout failure
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– concrete pry-out failure FI
– concrete edge failure
After calculating the characteristic strength of an anchor (for the applicable failure mechanism),
partial safety factors are used to determine the design load.
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The DEMU boltanchors type 1980 with St.st. 303 connector, 1985 and 1988 with zinc plated R
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connector and the 1988 with st.st.connector 316 Ti class 80, meet the requirements mentioned in the U
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standards and can be calculated according the new Dutch method without any additional tests. C
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Consequences are: B
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– The edge distances (5 x d ) and centre to centre distances (10 x d ), mentioned in old
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catalogues, are not valid anymore. Minimum distances have to be used according the new
calculation method and also different (reduction)factors have to be taken into account if anchors
are placed close to eachother and/or close to an edge.
– The boltanchor type 1980 with St.st. connector 303 is produced with a 4.6 bolt (yield strength
240 N/mm²). Also the connector has a “low” yield strength of 240 N/mm². As a result of the
above, steel failure can give the lowest value of the different failure mechanisms.
– The combination of 8.8 bolts (yield strength 640 N/mm²) and the special St.st. 316 Ti class 80
connectors (yield strength 640 N/mm²) results in a 1998 boltanchor for which “steel failure” will S
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almost never occur. Compared to our “old” 1980 anchor with the standard available St.st. 316 Ti T
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class 50 connector (yield strength 240 N/mm²), the new boltanchor will give much higher design S
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loads. N
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The DEMU calculationprogram for boltanchors is available free of charge.
Please contact our local agent.
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C Group 4:
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H The DEMU baranchors types 1980-S, 1988-S and 3010 are designed for construction connections
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L T which require high admissible loads.
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E take high pull out loads. The minimum edge distance, this in contrast with the “short” boltanchors, is
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equal to the minimum required concrete covering according the (Dutch) NEN 6720.
Splitting of the concrete and (if neccessary) any additional splitting and/or shear load reinforcement
have to be calculated and checked.
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General technical information TI
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STAINLESS STEEL C
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DEMU uses the following type of stainless steel: H
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Type AISI 303 en 304 R
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These types, also known as 18-8 steel, give a good resistance against corrosion. E
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Mechanical properties:
AISI 303: yield strength: 240 N/mm², elongation 35%.
AISI 304: yield strength: 190 N/mm², elongation 45%.
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Type AISI 316 Ti E
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This stainless steel is stabilized with molybdenum and titanium. It carries a high resistance against D I
tension- and intercrystalline corrosion. N
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The material is very well suited for maritime- and industrial atmospheres. RS
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Mechanical properties: H
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Yield strength: 235 N/mm², elongation 35% A
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Type AISI 316 Ti class 80 FI
This stainless steel is stabilized with molybdenum and titanium. It carries a high resistance against
tension- and intercrystalline corrosion.
The material is very well suited for maritime- and industrial atmospheres.
Mechanical properties:
Yield strength: 640 N/mm², elongation 15%
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SPECIALS U
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In this catalogue our standard range of products is shown. We mention the used material, sizes, B
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admissible loads etc.
Special products can be made on request.
WELDING OF INSERTS
With exception of the inserts type 1074 en 1168 (page 20 en 21) and the connectors type 1551-M6,
M8 en M10 (page 24), all steel products are weldable. Welding can cause a change in the
mechanical properties. Also, the welding may not influence the threaded part of the insert. MS
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TI General technical information
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C ZINC PLATING OF INSERTS AND CONNECTORS.
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L T DEMU uses the following zincing processes:
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E Zinc plating (“yellow plated”)
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In this system, the inserts get a drum zinc plating proces together with a passivating treatment
(bicarbonate) with gives the product a yellow or silver colour.
The thickness of the zinc layer is 5-8 µ.
The corrosion resistance is limited and dependent on the environmetal circumstances.
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D I Hot dip galvanizing
N Hot dipped galvanizing can only be used on connectors. Inserts with a closed end are not suited for
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RS hot dipped galvanizing. During the galvanizing proces, airbubbles will occur inside the inserts and
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H the surplus of zinc can not be centrifuged because of the closed end.
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A The thickness of the zinc layer is 50-70 µ according NEN-EN-ISO 1461.
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N Connectors type 1550/1551 and the connectors for the boltanchors types 1980-P/1988 and
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FI baranchors types 1980-S/1988-S/1554/1558 and 3010 are first hot dipped galvanised and then
the internal thread is produced.
The internal thread itself is unprotected. The zinc layer of the bolt, which will be screwed into the
connector, will also protect the untreated thread of the connector.
THREAD
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E All threads of our inserts are isometric.
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U The minimum screw-in length of inserts without nailing plate is 1,2 x d .
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AR Products with a nailing plate have a minimum screw-in length of 1,5 x dnom.
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SIZES
All sizes are in mm unless otherwise specified.
CHANGES
DEMU has the rigth to change its specifications. These changes will be shown on our website
www.demu.com.
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