Next Previous

O-frame & U-frame Racks
(a.k.a. Closed-frame Racks)

The rack is an excellent device. One of its best features is that one can add or remove brake bars from service while on rappel. Closed-frame racks sacrifice this utility in favor of added strength. For general use, the extra strength probably isn't needed, so I stick with Open-frame racks.

The Howell-N-Mann Titan racks are an interesting variation. Made from certified titanium and featuring an O-frame, they are incredibly strong, but again, the ability to swap out a single bar is lost.

The last two columns in the table are the internal width and available length. These are arguably the most important dimensions for determining how well a rack functions, as opposed to how bulky it is for transport. I defined and measured the entries in these columns as follows:

Gallery

SBCI (?), Version B
Image ID Device Description Acquired Weight Height Width Thickness Std. volume Int. Width Avail. Length
ASR NFPA 931 ASR NFPA 9.5 mm. SS frame, 1 long & 5 standard solid bars (3 color anodized), lock & cap nuts Roy Schrader, 2003 943 315 111 25 891 37 109
Bassett Metal Studios Long Microrack 1234 Bassett Metal Studios Long Microrack 7.9 m SS frame, 1 hyperbar & 3 standard hollow SS bars, cap nuts Howie's Harnesses, 2009 430 269 70 27 498 18 109
Bassett Metal Studios Mini 389 Bassett Metal Studios Mini 8 m SS frame, 1 hyperbar & 3 standard hollow SS bars, cap nuts John E. Weinel, Inc., 1994 348 225 63 19 269 16 72
Bassett Metal Studios Pico-Rack 549
2400
Bassett Metal Studios Pico-Rack 6.4 mm. SS frame, 2 16.5 & 1 14 mm. hollow SS unnotched bars, lock nuts. PED
  • Bassett Metal Studios, 1997
  • Bob Thrun Collection, 2017
150 119 41 18 88 19 NA
Bassett Metal Studios, Version A 527 Bassett Metal Studios, Version A 9.5 mm. SS frame, 1 dual hyperbar & 5 std hollow SS bars, lock nuts Inner Mountain Outfitters, 1997 824 310 120 24 893 33 94
Bassett Metal Studios, Version B 1006 Bassett Metal Studios, Version B 9.5 mm. SS frame, 2 dual hyperbar & 2 std hollow SS bars, lock nuts Barry Duncan, 2005 702 255 120 22 658  34 97 
Behto 928 Венто (Vento) 7.9 mm. steel frame, 2 20 mm. hollow painted steel bars, 1 std Al bar, 1 Al hyperbar. John E. Weinel, Inc., 2003 376 223 62 20 278 26 72
British 1450 British, Version A 9.5 mm. SS frame, 5 solid 19 mm. Al bars, lock nuts Jim Mousley, 2015 453 200 65 20 256 28 40
British 2402 British, Version B 9.5 mm. SS frame, 6 solid 19 mm. Al bars, lock nuts Bob Thrun Collection, 2017 574 277 65 19 336 28 90
1478 CMC 3D 9.5 mm. SS frame /w milled flats, Upper dual hyperbar, 1 large bar /w latch, inverted lower dual hyperbar Inner Mountain Outfitters, 2016 483 171 106 32 569 20 NA
CMI Firefly Personal Escape Rack 901 CMI Firefly Personal Escape Rack 6.6 mm. SS frame, 2 19.2 & 1 16.1 mm. anodized Al unnotched bars, lock nuts, PED Karst Sports, 2001 145 125 41 19 98 20 NA
CMI Hyper Rack Extreme 991 CMI Hyper Rack Extreme 7.9 mm. SS frame, 2 22 mm. solid hyper & 2 19 mm. solid soft anodized Al bars, lock & cap nuts Barry Duncan, 2005 431 211 89 23 423 28 53
CMI Microrack 508 CMI Microrack 7.9 mm. SS frame, 2 22 mm. & 2 19 mm. solid unfinished Al bars, lock & cap nuts Karst Sports, 1995 340 208 51 22 233 18 85
CMI Rescue Rack 509 CMI Rescue Rack 9.5 mm. SS frame, 1 long solid 25 mm. Al & 6 sttamped steel bars, lock & cap nuts Karst Sports, 1995 1015 410 102 28 1171 34 144
Goldlock Curlew 390 Goldlock Curlew 7.9 mm. SS frame, 4 solid soft anodized bars, lock nuts Al Fincham, 1981 317 166 64 20 212 37 22
Howell-N-Mann Version A 1293 Howell-N-Mann Version A 9.5 mm. Ti frame, Dual Ti/Al hyperbar & 5 short Ti/Al bars, lock nuts Sam Howell, 1920 488 277 115 19 605 43 82
Howell-N-Mann Version B 1379 Howell-N-Mann Version B 9.5 mm. Ti frame, Ti/Bondo hyperbar, 2 short & 1 long Ti bars Ed Sira, 2012 500 242 90 19 412 20 90
Howell-N-Mann Version C 1380 Howell-N-Mann Version C 9.5 mm. Ti frame, Ti/Al hyperbar, 2 short Ti/Al bars, 1 long Ti/Al dual-horn bar, pinned caps Ed Sira, 2012 291 199 88 21 365 19 60
Howell-N-Mann Min 391 Howell-N-Mann Mini 6.5 mm. Ti frame, 1 dual Ti/Alhyperbar and 2 Ti/Al bars, screw gate, prototype #0001 Howell-N-Man, 1993 184 195 74 19 274 24 0
Howell-N-Mann Mt. Sira 392 Howell-N-Mann Mt. Sira

9.5 mm. Ti frame, Dual Ti/Al hyperbar, 2 short & 1 longer Ti/Al bars, lock nuts Ed Sira, 1994 281 213 62 20 264 21 73
Howell-N-Mann Titan I 393
1292
Howell-N-Mann Titan I 9.5 mm. Ti O-Frame, 1 dual Ti/Al hyperbar & 2 standard bars, screw gate
  • Howell-N-Man, 1993
  • Sam Howell, 2011
334 210 105 22 485 43 5
Howell-N-Mann Titan II 394 Howell-N-Mann Titan II 9.5 mm. Ti O-Frame, 1 dual Ti/Al hyperbar & 4 standard bars, screw gate Howell-N-Man, 1993 457 282 105 22 651 43 24
Howell-N-Mann Titan Prototype 1290 Howell-N-Mann Titan Prototype 9.5 mm. Ti O Frame, 1 Ti/Al hyperbar & 4 standard bars, screw gate Sam Howell, 2011 385 305 106 29 934 40 27
Howell-N-Mann Titan 4-Bar 1291 Howell-N-Mann Titan 4-Bar 9.5 mm. anodized Ti O Frame, 1 Ti/Al hyperbar & 3 standard bars, screw gate Sam Howell, 2011 410 234 112 23 600 42 0
Kong-Bonaiti, Version A 395 Kong-Bonaiti, Version A 7 mm. SS frame, 2 22 mm. & 2 20 mm. solid unfinished Al bars, machined & pinned posts Speleoshoppe, 1982 287 205 48 22 216 27 51
Kong-Bonaiti, Version B 1329 Kong-Bonaiti, Version B 7 mm. SS frame, 2 22 mm. & 2 20 mm. solid unfinished Al bars, machined & pinned posts Geoffrey Storey, 2012 289 205 48 22 217 27 49
Kong Rackong #808PRB 1194 Kong Rackong #808PRB 7 mm. SS frame, 1 22 mm. single hyperbar, 1 22 mm. & 3 20 mm. std. bars, all bars solid anodized Al, machined & pinned posts Amplatz Sport, 2009 329 205 82 22 368 27 52
Krok 4-bar, Version A 1104 Krok 4-bar, Version A 7.9 mm. steel frame, 18 mm. bars (2 hollow, 1 solid & 1 inverted hyperbar), oxide finished, jam & lock nuts, plastic cover Petrenko World, 2007 521 240 70 18 303  26 87
Krok 4-bar, Version B 1331 Krok 4-bar, Version B 8 mm. steel frame, 18 mm. bars (3 solid & 1 inverted hyperbar), galvanized, threaded posts Gear4Rocks, 2012 535 202 71 18 256 26 39
Krok Speleo 1333 Krok Speleo 8 mm. steel frame, 18 mm. hollow bars (3 plain & 1 inverted hyperbar), galvanized, threaded posts Gear4Rocks, 2012 467 203 70 20 284 25 33
Krok 5-bar, Version A 1105 Krok 5-bar, Version A 7.9 mm. steel frame, 18 mm. bars (2 hollow, 2 solid & 1 inverted hyperbar), zinc plated, jam & lock nuts, plastic cover Petrenko World, 2007 587 240 70 18 297  26  66
Krok 5-bar, Version B 1351 Krok 5-bar, Version B 8 mm. steel frame, 18 mm. bars (2 hollow, 2 solid) & 1 inverted 18.8mm hyperbar, posts Gear4Rocks, 2012 643 243 70 19 322 25 60
Krok 5-bar, Version C 1332 Krok 5-bar, Version C 8 mm. steel frame, 18 mm. bars (2 hollow, 2 solid) & 1 inverted 17.2mm hyperbar, zinc plated, jam & lock nuts, plastic cover Gear4Rocks, 2012 607 240 70 19 317 26 66
Mio Mechanical MIO-R 1057 Mio Mechanical MIO-R 9.5 mm.SS rods on cast Al body, 4 solid 25.4 mm. Al bars, lever actuated brake cam, overspeed control CWC Supply, 2007 2160 358 157 85 4797 29 29
Mio Mechanical 1459 Mio Mechanical MIO-R2, Version A 9.5 mm. SS rods on cast Al body, 4 solid 25.5 Al bars, lever actuated brake cam Don Stephens, 2015 1382 300 163 80 3908 29 28
Mio Mechanical MIO-R2 1066 Mio Mechanical MIO-R2, Version B 9.5 mm. SS rods on cast Al body, 4 solid 25.5 Al bars, lever actuated brake cam CWC Supply, 2007 1397 299 142 81 853 29 23
Mio Mechanical RR-1A 1064 Mio Mechanical RR-1A 9.5 mm. SS frame, 4 solid unfinished Al bars (hyperbar, short, long & short) CWC Supply, 2007 853 287 114 25 853 36 107
Mio Mechanical RR-2A 1065 Mio Mechanical RR-2A 9.5 mm. SS frame,1 solid Al hyperbar and 5 short solid Al bars CWC Supply, 2007 979 290 115 25 853 36 62
Mio Mechanical RR-3S 1070 Mio Mechanical RR-3S 9.5 mm. SS frame,1 SS tube hyperbar, 5 short SS tube bars, 1 center swivel tie-in bar CWC Supply, 2007 1394 350 114 26 853 36 80
Pathfinder Sports 397 Pathfinder Sports 9.7 mm. SS frame, 2 solid & 4 hollow unfinished Al bars, 2 set screw spacers, hex & lock nuts Pathfinder Sports, 1979 778 306 63 26 501 35 109
PFH Rap-Rak, 3–Gate 597 PFH Rap-Rak, 3–Gate 7.9 mm. SS O frame, 3 hollow SS bars Inner Mountain Outfitters, 2001 236 165 52 19 165 29 29
PFH Rap-Rak, 4–Gate 598 PFH Rap-Rak, 4–Gate 7.9 mm. SS O frame, 4 hollow SS bars, lock-off tab Inner Mountain Outfitters, 2001 309 225 52 19 226 29 23
PFH Rap-Rak, 6–Gate 599 PFH Rap-Rak, 6–Gate 7.9 mm. SS O frame, 6 hollow SS bars, lock-off tab Inner Mountain Outfitters, 2001 412 281 52 19 282 29 41
R.E.D.E. Rack 525 R.E.D.E. Rack 9.5 mm. SS frame, 4 solid soft anodized & 1 long hollow bar /w rubber ends, springs, nonbraking bar, lock & cap nuts Desert Rock Sports, 1997 780 262 242 32 2029 33 20
Rescue Systems Inc. 398 Rescue Systems Inc., Version A 9.5 mm. SS frame, 1 long & 5 standard solid unfinished bars, lock & cap nuts John E. Weinel, Inc., 1989 957 330 111 25 916 36 96
Rescue Systems Inc. 2445 Rescue Systems Inc., Version B 9.5 mm. SS frame, 1 long & 5 standard solid unfinished bars, lock & cap nuts Bob & Bob, 2017 999 333 111 25 941 36 100
Rescue Tech Rigger Rescue Rack 1179
1195
Rescue Tech Rigger Rescue Rack 9.5 mm. SS frame, 1 long & 5 standard solid unfinished bars, lock & cap nuts
  • Thomas Costello, 2008
  • William Deaton, 2009
987 355 111 26 1005 35 124
Roloff Rack, Version A 517 Roloff Rack, Version A 8.4 mm. SS frame, 3 10 mm. welded steel & 2 16 mm. pivoting Al solid bars, noncommercial Ed Sira, 1995 254 180 62 17 190 32 0
Roloff Rack, Version B 545 Roloff Rack, Version B 8.4 mm. SS frame, 3 10 mm. welded steel & 2 16 mm. pivoting SS hollow bars, noncommercial NSS Auction, 1998 196 220 50 16 176 26 0
SBCI, Version A 396 SBCI,
Version A
7.3 mm. SS frame, 2 22 mm. & 2 19 mm. solid grooved unfinished Al bars, machined & pinned posts John E. Weinel, Inc., 1990 301 207 50 23 238 28 51
SBCI (?), Version B 912 SBCI (?),
Version B
7.3 mm. SS frame, 2 22 mm. & 2 19 mm. solid unfinished Al bars, machined & pinned posts Jason Brown, 2002 295 204 50 22 226 28 50
SBCI (?), Version C 2444 SBCI,
Version C
9.5 mm. SS frame, 1 long & 5 standard solid bars (3 color anodized), lock & cap nuts Bob & Bob, 2017 962 340 25 111 959 34 109
Single Rope Technique DR3 399 Single Rope Technique DR3 7.9 mm. SS frame, 3 solid soft anodized bars, machined & pinned posts Single Rope Technique, 1989 307 167 58 22 213 34 0
Single Rope Technique DR5 400 Single Rope Technique DR5 7.9 mm. SS frame, 5 solid soft anodized bars, machined & pinned posts Single Rope Technique, 1989 494 257 57 22 322 34 70
SMC NFPA 14400 1187 SMC NFPA 14400 9.5 mm. SS frame, 2 SS single hyperbars & 2 SS bars, hex & cap nuts On Rope 1, 2009 755 241 92 25 561 32 63
SMC NFPA 14600 1188 SMC NFPA 14600 9.5 mm. SS frame, 1 SS single hyperbar & 5 Al bars, hex & cap nuts On Rope 1, 2009 845 356 93 27 874 32 153
SMC Micro U Rack 1415 SMC Micro Rack 7.9 mm. SS frame, 2 SS single hyperbars & 2 SS bars, hex & cap nuts Inner Mountain Outfitters, 2014 408 239 70 22 360 18 77
SOB 1423 SOB 9.0 mm. SS O frame, 4 std Al bars, 1 inverted hyperbar Gold Bucket, 2014 509 284 82 23 529 28 44
Speleoshoppe SupeRack, Version A 401
1378
2401
Speleoshoppe SupeRack, Version A 9.5 mm. SS frame, 4 25 mm. solid square bars, spacers, hex & cap nuts
  • Jennifer Kerrigan, 1982
  • Jack Hissong, 2012
  • Bob Thrun Collection, 2017
822 323 73 25 589 39 149
Speleoshoppe SupeRack, Version B 1377 Speleoshoppe SupeRack, Version B 9.5 mm. SS frame, 5 25 mm. solid square bars, 1 Seamans bar, spacers, hex & cap nuts Speleoshoppe, 2012 973 322 70 26 579 35 80
Storrick Femtorack 1230 Storrick Femtorack 7.9 mm. SS frame, 1 16 mm. & 1 19 mm. SS bar, lock nuts Dr. Gary D. Storrick, 2009 221 94 46 19 82 17 0
Storrick Monster Rack, Version A 402 Storrick Monster Rack, Version A 11.3 mm. SS frame, 3 25 mm. & 3 19 mm. solid square bars, spacers, hex nut & machined posts, noncommercial Robert W. Storrick, 1975 1179 354 88 28 872 51 75
Storrick Monster Rack, Version B 403 Storrick Monster Rack, Version B 11.3 mm. SS frame, 3 25 mm., 3 19 mm. solid square bars, 1 round hollow bar, spacers, hex nut & machined posts, noncommercial Robert W. Storrick, 1975 1249 354 88 28 872 50 50
Unknown 1264 Unknown 9.8 mm. painted SS frame, 6 19 mm. solid round soft-anodized Al bars, lock nuts Ron Boomsma, 2010 521 239 64 19 291 28 67
Unknown "S," Version A 1161 Unknown "S," Version A 9.5 mm. SS frame, 4 19 mm. solid round Al bars, hex nut, noncommercial Bill Boehle, 2008 299 278 70 21 409 40 153
Unknown "S," Version B 1162 Unknown "S," Version B 9.5 mm. SS frame, 4 19 mm. solid round Al bars, hex nut, tplastic tube spacers, noncommercial Bill Boehle, 2008 325 286 74 19 408  43  25
WHiO, Version A 1429 WHiO, Version A 6.3 mm. Ti frame, 5 15.8 mm. tubular round Ti bars, hex & acorn nuts. Bevan Trower, 2014 134 238 51 16 193 24 90
RappelImages/URackImages/DSC1429_0561.JPG 1430 WHiO, Version B 6.3 mm. Ti frame, 1 15.8 mm. tubular round Ti hyperbar & 4 15.8 mm. tubular round Ti bars, hex & acorn nuts. Bevan Trower, 2014 144 234 75 16 279 24 85
X-Rack 1014 X-Rack 7.5 mm. SS frame, 5 19 mm. round hollow bars Andrew Tupalski, 2006 250 248 46 19 218  25  57
Speleobooks Keychain Rack 521 Speleobooks Key Chain Rack 5 mm. SS frame, 5 hollow SS bars, cap nuts.
UNSAFE! Decorative use only.
Speleobooks, 1996 37 74 25 5 9 12 NA

Rack weight chart J-frame Racks