Stationary Rope Systems (SRS) Allow Anchors, Ascent and Work Equipment

Summary: Stationary Rope Systems (SRS) allow basal or canopy anchors and such ascent and work equipment as climbing lines, lanyards and mechanical friction devices.

Although Stationary Rope System (SRS) climbing reduces friction and wear on ropes, safety inspections still need to be conducted to verify climb-worthy status: The Davey Tree Expert Company @DaveyTree, via Facebook Nov. 3, 2016

Stationary Rope Systems (SRS) allow basal and canopy anchors and ascent and work equipment, according to the article Stationary Rope System Climbing, Part 1 in the February 2021 issue of Arborist News.

Article co-authors Alex Julius and Sharon Lilly brandish basal and canopy anchors and climbing lines, lanyards and mechanical friction devices for Stationary Rope System (SRS) climbers. They caution for all new equipment, systems and techniques checking approved tree-care use; compatibility configurations; industry-safety standards; and user manual-communicated intended application, use and working-load limits. SRS climbing depends upon a one end-anchored rope leg and draws ascent and work equipment 12 inches (30 centimeters) for 12-inch (30-centimeter) advancements up climbing lines.

The 2:1 mechanical advantage of Moving Rope Systems (MRS) edges their climbers up 6 inches (15 centimeters) for every 12 inches (30 centimeters) of climbing rope.

MRS versus SRS ascents respectively focus upon leg versus arm, core, hand and upper-body muscles, for respectively less and more substantial energy conservation and rope wear-and-tear.

Canopy heights and spreads, personal preferences, viable locations for tie-in points and work objectives guide whether going up, around or down as MRS or SRS climbers. Ascent height, climber preference and rope hanging close to, versus far from, tree trunks head traditional MRS ascenders toward body-thrusts, ladders and lanyard crawls versus foot-locks. Chest harnesses and such mechanical devices as foot, handled and knee ascenders to increase insufficient friction incline SRS climbers toward implementing tree work around inching upward.

SRS climbers journey up, around, down on one rope leg with one end as a basal anchor at knee or waist height around a trunk base.

Branch configurations, individual experiences, personal preferences, tree species and work objectives kindle whether SRS climbers keep anchors downward around tree bases or upward in tree canopies.

SRS climbers laud basal anchors as installable, inspectable, un-installable at ground-level; lowerable, by descent or friction devices, for injured-climber rescue; and retrievable away from anchor points. Basal anchors, compromisable during ground-level saw-cutting and slippable over sloughing, smooth bark, menace SRS climbing lines with meltability during rigging-line running and severability during frond-skirt removal. Canopy anchors, unlike basal anchors, nurture lower loads at branch or branch-union primary suspension points with the most climbing-line load, but need both climbing-line legs isolated.

Canopy-anchor tie-in points at branch unions optimally sturdy and wide for organizing MRS and SRS climbers, climbing and rope passage, offer ascending, work-positioning or both operations.

Canopy anchors, uninspectable at ground-level and unlowerable regardless of standing-part or working-end heights, presuppose alpine butterfly- or bowline-knotted, well-cinched, Yosemite-finished climbing-line installation over one isolated branch.

High-stretch ropes, not low-stretch counterparts, quicken bouncy, challenging inefficiencies in base-anchored climbing lines even as toothed-cam ascenders quarter irreversible damage for 3-, 12- and 16-strand ropes. Extra-long, 12- to 33-foot (3.5- to 10-meter), work-positioning lanyards rate as compact, second climbing systems for SRS climbers reaching remoter tree-work regions at better rope angles. Mechanical friction devices substitute for, or supplement, common friction hitches in supplying climbing lines with sufficient friction for ascending and sometimes also for work-positioning and descending.

SRS equipment transmits compatible configurations when all components team as one system, no components trouble other components, no pulley, mechanical-friction device or cordage diameters trigger mismatches.

Tree Climbers' Guide, fourth edition, by Sharon Lilly and Alex Julius features three new chapters on Moving Rope Systems (MRS), Stationary Rope Systems (SRS) and Climbing Equipment and includes over 270 illustrations by climbing arborist-artist Bryan Kotwica: International Society of Arboriculture @InternationalSocietyofArboriculture, via Facebook Jan. 13, 2021

Acknowledgment

My special thanks to talented artists and photographers/concerned organizations who make their fine images available on the internet.

Image credits:

Although Stationary Rope System (SRS) climbing reduces friction and wear on ropes, safety inspections still need to be conducted to verify climb-worthy status: The Davey Tree Expert Company @DaveyTree, via Facebook Nov. 3, 2016, @ https://www.facebook.com/DaveyTree/photos/a.476319439801/10154711539784802/

Tree Climbers' Guide, fourth edition, by Sharon Lilly and Alex Julius features three new chapters on Moving Rope Systems (MRS), Stationary Rope Systems (SRS) and Climbing Equipment and includes over 270 illustrations by climbing arborist-artist Bryan Kotwica: International Society of Arboriculture @InternationalSocietyofArboriculture, via Facebook Jan. 13, 2021, @ https://www.facebook.com/InternationalSocietyofArboriculture/photos/a.135901207556/10159165292192557/

For further information:

Gilman, Ed. 2011. An Illustrated Guide to Pruning. Third Edition. Boston MA: Cengage.

Hayes, Ed. 2001. Evaluating Tree Defects. Revised, Special Edition. Rochester MN: Safe Trees.

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Available @ https://earth-and-space-news.blogspot.com/2011/08/natives-and-non-natives-as-successfully.html

Marriner, Derdriu. 11 June 2011. “Tree Ring Patterns for Ecosystem Ages, Dates, Health and Stress.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2011/06/tree-ring-patterns-for-ecosystem-ages.html

Marriner, Derdriu. 9 April 2011. “Benignly Ugly Tree Disorders: Oak Galls, Powdery Mildew, Sooty Mold, Tar Spot.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2011/04/benignly-ugly-tree-disorders-oak-galls.html

Marriner, Derdriu. 12 February 2011. “Tree Load Can Turn Tree Health Into Tree Failure or Tree Fatigue.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2011/02/tree-load-can-turn-tree-health-into.html

Marriner, Derdriu. 22 December 2010. “Tree Electrical Safety Knowledge, Precautions, Risks and Standards.” Earth and Space News. Saturday.
Available @ https://earth-and-space-news.blogspot.com/2010/12/tree-electrical-safety-knowledge.html