Kee Klamp Technical Specifications
The Kee Klamp Tubular Fittings
The simple but effective engineering principle of the KEE KLAMP tubular fittings is the foundation of the most versatile tube connection system available. There are many variations of tubular fittings to suit wide-ranging applications, providing the versatility to achieve virtually any structural configuration.
KEE KLAMP tubular fittings are generally made from cast iron* and are manufactured to the requirements of EN 1562 & EN 1563 and galvanized to the requirements of EN ISO 1461. A range of Components to suit seven sizes of tube is available. A simple hexagon key is the only tool required to create a strong, rigid joint. A recessed grub screw tightened by the hexagon key firmly locks the tube into the Component. The grub screw is generally manufactured in case-hardened steel* and benefits from Kee Koat® protection against corrosion. This, combined with the ThredKoat® (patented) factory-applied coating for the threaded recesses, ensures that KEE KLAMP tubular fittings achieve longer life and better corrosion resistance.
A KEE KLAMP Component (size 5 to 9) can support an axial load of *900 Kg (2000 lbs) per grub screw with the grub screw tightened to a torque of 39 Nm (29 lbs. ft.).
* Materials used can vary according to application. Please refer to the manufacturer for detailed specifications.
Swivel Fittings
Types F50, M50, MH50, M51, MH51, M52, M53, and M58 are known as swivel fittings and can be assembled as Types C50, CH50, C51, C52, C53, and C58 or supplied as separate items. They are frequently used for bracing but can also overcome problems where joints are required at angles other than those achieved by fixed-angle fittings. For economical use of tubing, when making ‘C’ fittings, or combination fittings, Types F50 (sizes 5 to 9 only) can be combined with different sizes of Types M50, MH50, M51, MH51, M52, M53, and M58. F50-4 and M50-4 will only combine with each other. WARNING!: An entire structure should not be constructed from swivel fittings, as they would not provide sufficient stability or rigidity in the structure. Types M50, MH50, M51, M52, M53, and M58 can also be used separately to secure various in-fill panels. These fittings are not designed to take bending moments.
The Slope Range (86–89)
The slope range of fittings consists of fitting Types 86, 87, 88, and 89. These fittings are designed to facilitate in-line railings with vertical posts on slopes with angles between 0° and 11°. They can be used to construct railings on access ramps for people with disabilities when used in conjunction with the KEE LITE Type L160 fitting (To enquire about KEE LITE, please email us at contact@selectfit.co.nz).
The PGR Range (90–95)
These are known as Pedestrian Guardrail (PGR) fittings and are used as an alternative to Types 10, 15, 25, and 26 when the site is not straight and level. There is a sufficient play within the fitting to negotiate a slope up to 7 degrees or a radius greater than 6 meters when the uprights are 2-meter centers using a straight tube. They also allow damaged rails to be removed without dismantling the adjacent structure. The 90 to 95 range of fittings is available in size 8.
The Slope Range (320-427)
This slope range of fittings is designed specifically for use on steeper gradients and consists of fitting Types 320, 321, 325, 326, and 427. These fittings are designed to facilitate in-line railings with vertical posts where the slope is greater than 30°.
Specifying Kee Klamp Tubular Fittings
The information on tubular fittings on this site is comprehensive and easy to use because of the coding system we have adopted.
Diagrams are shown for each Component, showing the entry of the tube, a table of dimensions, and a definition of use adjacent to its appropriate Type number (10, 15, 20, 25, etc.).
Alongside the Type, the number is a code (4, 5, 6, 7, etc.) relating to the outside diameter of the tube for which the Kee Klamp tubular fitting had been designed. The relationship between the KEE KLAMP tube reference and standard tube outside diameter is explained in the aforementioned chart.
| KEE KLAMP tube size | Tube diameter (mm o.d.) | Nominal bore* (mm) |
|---|---|---|
| 3 | 17.5 | 10 |
| 4 | 21.3 | 15 |
| 5 | 26.9 | 20 |
| 6 | 33.7 | 25 |
| 7 | 42.4 | 32 |
| 8 | 48.3 | 40 |
| 9 | 60.3 | 50 |
*Nominal bore is an arbitrary dimension because the bore varies with the wall thickness of the tube.
Example: (1) A 10-7 is a Type 10 KEE KLAMP Component with both sockets designed to accept a tube that has an outside diameter of 42.4mm or 1 11/16″ (1 1/4″ Nominal tube Size). (2) A 25-9 is a Type 25 KEE KLAMP Component with all three sockets designed to accept a tube that has an outside diameter of 60.3mm or 2 3/8″ (2″ N.P.S.).
Where more than one tube reference is shown alongside a particular Type number, it indicates that the individual sockets are designed to accept different tube sizes. In a multi-digit code number, the first figure relates to the ‘A’ socket and the second to the ‘B’ socket. Example (3) A 45-76 is a Type 45 KEE KLAMP Component with an ‘A’ socket accepting a tube that has an outside diameter of 42.4mm or 1 11/16″ and a ‘B’ socket accepting a tube/pipe that has an outside diameter of 33.7mm or 1 11/32″.
While Kee Klamp Ltd. can give a general guidance relating to the use of each KEE KLAMP Component detailed on this site, the nature of the product means that the ultimate responsibility for selecting the correct fitting for an application must lie with the customer.
The customer should also ensure that the existing structure to which the KEE KLAMP construction is being secured, is of sufficient strength to support both the self-weight of the KEE KLAMP construction and the imposed loads applied, including wind loads, snow loads, and any other superimposed loads.
Pipe Size Diagram
Metric Beam Load Table
For uneven load distributions or single spans, the required tube size must be determined by standard bending moment calculations assuming a KEE KLAMP joint to give a simply supported beam. The table shown below only indicates the safe load uniformly distributed, in kg, that may be carried per shelf consisting of front and back tubes when used as continuous beams. Recommended set screw torque: 39 Nm.
At loads greater than 900 kg, consideration must be given to the grub screw slip.
| span (m) | |
|---|---|
| Fitting Size | Tube Size |
| 5 | 26.9mm x 2.6 |
| 6 | 33.7mm x 3.2 |
| 7 | 42.4mm x 3.2 |
| 8 | 48.3mm x 3.2 |
| 9 | 60.3mm x 3.6 |
| 0.5 | 540 | 1060 | 1750 | 2380 | 4000 |
| 0.6 | 435 | 850 | 1407 | 1870 | 3250 |
| 0.7 | 375 | 730 | 1207 | 1595 | 2760 |
| 0.8 | 330 | 645 | 1063 | 1385 | 2420 |
| 0.9 | 295 | 579 | 946 | 1230 | 2160 |
| 1.0 | 265 | 525 | 850 | 1110 | 1950 |
| 1.1 | 240 | 478 | 770 | 1013 | 1775 |
| 1.2 | 219 | 438 | 705 | 930 | 1625 |
| 1.3 | 202 | 403 | 651 | 858 | 1497 |
| 1.4 | 187 | 373 | 604 | 796 | 1387 |
| 1.5 | 175 | 347 | 564 | 741 | 1290 |
| 1.6 | – | 325 | 529 | 693 | 1205 |
| 1.7 | – | 306 | 499 | 650 | 1129 |
| 1.8 | – | 290 | 472 | 613 | 1061 |
| 1.9 | – | 277 | 448 | 581 | 999 |
| 2.0 | – | 268 | 427 | 553 | 987 |
| 2.1 | – | – | 408 | 528 | 944 |
| 2.2 | – | – | 391 | 505 | 855 |
| 2.3 | – | – | 376 | 485 | 818 |
| 2.4 | – | – | 362 | 467 | 785 |
| 2.5 | – | – | 349 | 450 | 755 |
| 2.6 | – | – | – | 434 | 728 |
| 2.7 | – | – | – | 419 | 703 |
| 2.8 | – | – | – | 405 | 680 |
| 2.9 | – | – | – | – | 659 |
| 3.0 | – | – | – | – | 639 |
| 3.1 | – | – | – | – | 620 |
| 3.2 | – | – | – | – | 603 |
| 3.3 | – | – | – | – | 588 |
| 3.4 | – | – | – | – | 575 |
| 3.5 | – | – | – | – | 564 |
The table reflects a safety factor of 1.67:1
Metric Upright Load Table
This table only indicates the safe load, in kg., that may be carried between the above restraints by single tubes to EN 10255 when used as uprights. Loads listed under the ‘A’ columns refer to those loads that are obtainable according to schematic ‘A,’ and loads listed under ‘B’ columns refer to those loads that are obtainable according to schematic ‘B.’ Schematic ‘B’ details a racking system that is mechanically affixed to the surface on which it stands, whereas schematic ‘A’ details a free-standing racking system. Recommended set screw torque: 39 Nm
Load table (Kg) – unfixed upright
| Length (m) | |
|---|---|
| Fitting Size | Fitting Size |
| 5 | 26.9mm x 2.6 |
| 6 | 33.7mm x 3.2 |
| 7 | 42.4mm x 3.2 |
| 8 | 48.3mm x 3.2 |
| 9 | 60.3mm x 3.6 |
| 0.3 | 1860 | 3086 | 4192 | 4916 | 7250 |
| 0.4 | 1600 | 2810 | 3910 | 4638 | 6930 |
| 0.5 | 1360 | 2534 | 3628 | 4360 | 6610 |
| 0.6 | 1140 | 2258 | 3346 | 4082 | 6290 |
| 0.7 | 940 | 1982 | 3064 | 3804 | 5970 |
| 0.8 | 775 | 1706 | 2782 | 3526 | 5650 |
| 0.9 | 640 | 1471 | 2500 | 3384 | 5330 |
| 1.0 | 540 | 1269 | 2235 | 3248 | 5010 |
| 1.1 | – | 1092 | 1995 | 2970 | 4690 |
| 1.2 | – | 937 | 1779 | 2692 | 4370 |
| 1.3 | – | – | 1587 | 2414 | 4050 |
| 1.4 | – | – | 1417 | 2169 | 3730 |
| 1.5 | – | – | 1265 | 1954 | 3410 |
| 1.6 | – | – | 1130 | 1764 | 3130 |
| 1.7 | – | – | – | 1602 | 2890 |
| 1.8 | – | – | – | 1462 | 2680 |
| 1.9 | – | – | – | 1342 | 2480 |
| 2.0 | – | – | – | 1242 | 2300 |
| 2.1 | – | – | – | – | 2120 |
| 2.2 | – | – | – | – | 1950 |
| 2.3 | – | – | – | – | 1800 |
| 2.4 | – | – | – | – | 1650 |
The table reflects a safety factor of 2:1
Load table (Kg) – fixed uprights
| Length (m) | |
|---|---|
| Fitting Size | Tube Size |
| 5 | 26.9mm x 2.6 |
| 6 | 33.7mm x 3.2 |
| 7 | 42.4mm x 3.2 |
| 8 | 48.3mm x 3.2 |
| 9 | 60.3mm x 3.6 |
| 0.3 | 1720 | 2950 | 4038 | 4783 | 7044 |
| 0.4 | 1435 | 2617 | 3703 | 4446 | 6661 |
| 0.5 | 1150 | 2284 | 3368 | 4109 | 6278 |
| 0.6 | 910 | 1951 | 3033 | 3772 | 5895 |
| 0.7 | 725 | 1618 | 2690 | 3435 | 5512 |
| 0.8 | 590 | 1348 | 2363 | 3098 | 5129 |
| 0.9 | 480 | 1128 | 2028 | 2761 | 4746 |
| 1.0 | – | 948 | 1752 | 2424 | 4363 |
| 1.1 | – | 798 | 1524 | 2134 | 3980 |
| 1.2 | – | – | 1340 | 1884 | 3597 |
| 1.3 | – | – | 1188 | 1668 | 3253 |
| 1.4 | – | – | 1066 | 1484 | 2951 |
| 1.5 | – | – | – | 1328 | 2681 |
| 1.6 | – | – | – | – | 2441 |
| 1.7 | – | – | – | – | 2226 |
| 1.8 | – | – | – | – | 2032 |
| 1.9 | – | – | – | – | 1857 |
| 2.0 | – | – | – | – | 1697 |
The table reflects a safety factor of 2:1
To help with the selection of the correct tube:
Table 1Â Horizontal tube load capacity provides the uniformly distributed loads that can be supported between upright posts assuming that the load is supported by two tubes. These loads are calculated based on the maximum bending movement for the tube.
Table 2Â Vertical tube load capacity provides the load capacity for single upright posts with various unsupported lengths. These loads are based on the compression strength and buckling loads of the CHS tube.
Table 3 contains our recommendations to safely meet the stated design loads based on the maximum permissible bending moment of the Upright tube. Â
Table1. Horizontal Tubes Load Capacity
Uniformally distributed load in Kg using two horizontal tubes
Tube Ø
Span (metres) 26.9mm x 2.6 33.7mm x 3.2 42.4mm x 3.2 48.3mm x 3.2 60.3mm x 4.0
0.5 540 1060 1750 2380 4000
0.6 435 850 1407 1870 3250
0.7 375 730 1207 1595 2760
0.8 330 645 1063 1365 2420
0.9 295 579 946 1230 2160
1.0 265 525 850 1110 1950
1.1 240 478 770 1083 1775
1.2 219 438 705 930 1625
1.3 202 403 651 858 1497
1.4 187 373 604 796 1387
1.5 175 347 564 741 1290
1.6 325 529 693 1205
1.7 306 499 650 1129
1.8 290 472 613 1061
1.9 277 448 581 999
2.0 268 427 553 987
2.1 408 528 944
2.2 391 505 855
2.3 376 485 818
2.4 362 467 785
2.5 349 450 755
2.6 434 728
2.7 419 703
2.8 405 680
2.9 659
3.0 639
3.1 620
3.2 603
3.3 588
3.4 575
3.5 564
Table2. Vertical Strut Load Capacity
Vertical load in Kg per strut
Tube Ø
Strut Length (metres) 26.9mm x 2.6 33.7mm x 3.2 42.4mm x 3.2 48.3mm x 3.2 60.3mm x 3.6
0.3 1720 2950 4038 4783 7044
0.4 1435 2617 3703 4446 6661
0.5 1150 2284 3368 4109 6278
0.6 910 1951 3033 3772 5895
0.7 725 1618 2690 3435 5512
0.8 590 1348 2363 3098 5129
0.9 480 1128 2028 2761 4746
1.0 948 1752 2424 4363
1.1 798 1524 2134 3980
1.2 1340 1884 3597
1.3 1188 1668 3253
1.4 1066 1484 2951
1.5 1328 2681
1.6 2441
1.7 2226
1.8 2032
1.9 1857
2.0 1697
Table 3. Guardrail
Guardrail is the most common form of structure that is built with FastClamp fittings and requires careful consideration to meet required design loadings. Design loads are usually specified, however if unsure BS 6399 and BS 6180 are good reference documents.
The loading capacity of any guardrail structure is determined principally by the diameter, thickness and frequency of its Uprights.
This table contains our recommendations to safely meet the stated design loads based on the maximum permissible bending moment of the Upright tube.
Tube Ø
Maximum Upright Centres (mm)
900 mm high
Design Load 33.7 x 3.2mm 42.4 x 3.2mm 42.4 x 4.0mm 48.3 x 3.2mm 48.3 x 4.0mm 48.3 x 5.0mm
360 N/m 814 1369 1595 1828 2584 3052
740 N/m 396 666 776 889 1257 2229
1500 N/m 195 329 383 439 620 1100
1000 mm high
360 N/m 732 1232 1435 1645 2326 2930
740 N/m 356 599 698 800 1131 2006
1500 N/m 176 296 345 395 558 990
1100 mm high
360 N/m 666 1120 1305 1496 2114 2778
740 N/m 324 545 635 728 1028 1824
1500 N/m 160 269 313 359 507 900
Grade:BS EN 10255 (ISO 65)
Rails need only be 3.2mm thick and the same diameter as the upright.
