काठ चिपर र स्टम्प ग्राइन्डर फिड-रोलर सुरक्षा¶

Commercial brush chippers and carbide-tooth stump grinders used in arboriculture, utility line clearance, municipal forestry, and residential tree removal combine high-torque hydraulic crushing rollers with high-inertia rotating cutter assemblies. Inside a towable disc or drum wood chipper, two opposing toothed hydraulic feed rollers (feed wheels) grab tree limbs and pull them inward at 0.6 to 1.0 meters per second (2 to 3.3 feet per second) directly into a solid steel flywheel disc or drum weighing 200 to 650 kilograms (440 to 1,430 pounds) that spins at 1,000 to 2,200 revolutions per minute (RPM). Across arboricultural fatality investigations by OSHA, NIOSH, and the UK Health and Safety Executive (HSE), four lethal operational errors account for nearly all wood chipper and stump grinder casualties: (1) reaching past the edge of the infeed chute table with hands or feet to push short brush into the hydraulic feed rollers instead of using a wooden push paddle, (2) wearing cuffed gauntlet gloves, loose sleeves, or unclipped helmet chinstraps that snag on stiff branch stubs as a limb accelerates into the rollers, (3) letting a trailing arborist climbing line or rigging rope get snagged by brush entering the chipper, which yanks the rope through the cutter knives at 6 to 18 meters per second (20 to 60 feet per second) and decapitates or amputates anyone standing in a rope loop, and (4) walking in front of or beside an active stump grinder cutter wheel where broken tungsten-carbide teeth or buried stones are launched at over 150 kilometers per hour (93 miles per hour). If anyone is caught by a wood chipper feed roller, struck by a stump grinder wheel, or injured by a snagged rigging rope, call your local emergency number immediately (911 in the United States and Canada, 112 across the European Union, 999 in the United Kingdom, 000 in Australia, 111 in New Zealand) or consult our global directory of आपतकालीन नम्बरहरू. For closely related tree-care and trauma protocols, read our guides on wood chipper snag, rope entanglement, and feed chute safety bar triage, walk-behind trencher, stump grinder, and directional drill strike, chainsaw kickback, chain brake, and ballistic nylon chaps, र गम्भीर रक्तस्राव र windlass tourniquet आवेदन।

अब यो गर्नुहोस्¶

1. PUSH the 3-sided feed-control panic bar (FORWARD toward the knives) or pull the emergency Last-Chance Cables inside the chute immediately to stop and reverse the hydraulic feed rollers: On every ANSI Z133 / EN 13525 compliant brush chipper, pushing the wrap-around feed-control bar away from you (toward the machine) shifts the hydraulic spool valve into FULL REVERSE, backing the toothed feed rollers out. Pulling the bar toward you engages forward feed.
2. Disengage the cutter-disc PTO clutch lever and turn the diesel engine ignition key to OFF before attempting to free an entrapped hand or arm: Even after the hydraulic feed rollers stop or reverse, the heavy steel cutter disc or drum behind the rollers will coast under massive rotational momentum for 2 to 5 full minutes. Never reach behind the feed rollers until the cutter wheel has come to a complete standstill and the ignition key is in your pocket.
3. If a hand or forearm is crushed and pinned inside the toothed hydraulic feed rollers, relieve downward hydraulic spring/cylinder pressure using the manual hydraulic yoke-lift jack or valve: Do not pull forcibly on a limb pinned between spiked steel feed rollers, which strips skin and tears arteries. Use the chipper's hydraulic feed-wheel lift cylinder lever (or a mechanical jack/crowbar with wooden cribbing blocks) to raise the top feed roller vertically off the trapped limb.
4. Apply a CoTCCC windlass tourniquet 5 to 8 centimeters (2 to 3 inches) above any partial or complete limb amputation or high-velocity rope-snap avulsion: If a limb is severed by the feed rollers, cutter knives, or a supersonic rigging rope loop, strap a commercial windlass tourniquet onto the upper arm or thigh above the injury, twist the rod until bright red bleeding stops completely, and apply a second tourniquet directly above the first if bleeding continues.
5. For a stump grinder strike or flying carbide-tooth shrapnel injury, release the operator presence deadman grip, stabilize any impaled object in place, and pack deep junctional wounds: Never pull out a broken tungsten-carbide tooth or steel bolt embedded in the face, neck, chest, or leg. For deep groin or thigh gouges from a stump grinder wheel, apply a high-and-tight thigh tourniquet or pack the groin crease tightly with hemostatic Z-fold gauze and hold 5 minutes of two-handed pressure.
6. Package any amputated fingers, hands, or limbs using the "Dry-Cool-Indirect" double-bag method for microsurgical replantation: Rinse gross woodchips off the severed part gently with sterile normal saline, wrap it in saline-moistened sterile gauze, seal it inside a dry watertight plastic bag, and float that bag in an outer container filled with a 50/50 slurry of crushed ice and cold water (never place tissue directly on bare ice).

Decision tree: wood chipper draw-in, rope ingestion, and stump grinder trauma triage¶

flowchart TD
    Start["Wood Chipper or Stump Grinder Emergency: Feed-Roller Snag, Rope Snap, or Wheel Strike"] --> StopFeed["1. EMERGENCY FEED & POWER STOP: 1. Chipper: SLAM 3-Sided Panic Bar FORWARD (Toward Chute) to REVERSE Feed Rollers OR Pull Internal Last-Chance Cables 2. Disengage Cutter Clutch & Turn Engine Key OFF 3. Stump Grinder: Release Deadman Lever & Hit E-Stop"]

    StopFeed --> InjuryMech{"2. What is the victim's immediate injury mechanism?"}

    InjuryMech -->|"1. HAND / ARM CRUSHED & PINNED INSIDE TOOTHED FEED ROLLERS"| RollerExtricate["FEED-ROLLER EXTRICATION PROTOCOL: 1. Wait Until Feed Rollers Are Locked Stopped & Engine Is OFF (Beware Coasting Cutter Disc Behind Rollers) 2. Apply Proximal Windlass Tourniquet to Upper Arm BEFORE Lifting Roller if Limb Is Mangled 3. Raise Top Feed Roller Using Hydraulic Yoke Lift Cylinder or Jack + Cribbing"]

    InjuryMech -->|"2. TRAUMATIC AMPUTATION OR ROPE-LOOP AVULSION"| AmputationCare["HEMORRHAGE & REPLANTATION PROTOCOL: 1. Strap CoTCCC Windlass Tourniquet 5 to 8 cm Above Stump (Or High & Tight in Groin/Axilla) 2. Pack Junctional Groin/Shoulder Wounds With Hemostatic Gauze + 5 Min Direct Pressure 3. Double-Bag Severed Part in Moist Saline Gauze Inside Dry Bag Floating in Ice-Water Slurry"]

    InjuryMech -->|"3. STUMP GRINDER WHEEL LACERATION OR CARBIDE TOOTH SHRAPNEL"| StumpCare["STUMP GRINDER & BALLISTIC SHRAPNEL PROTOCOL: 1. Apply Tourniquet for Deep Lower-Extremity Lacerations 2. NEVER Pull Out Embedded Carbide Teeth or Rock Fragments in Face/Neck/Chest (Stabilize in Place) 3. Treat for Open-Globe Eye Trauma With Rigid Shield if Struck in Orbit -> Call 911 / 112 / 999"]

Deep dive 1: Mechanical anatomy of a brush chipper and the physics of feed-roller draw-in¶

To operate or perform rescue around a commercial wood chipper safely, you must distinguish between the two separate rotating assemblies inside the machine:

1. The Hydraulic Feed Rollers vs. The High-Inertia Cutter Disc/Drum¶

1. Stage 1: The Infeed Table and Hydraulic Feed Rollers (60 to 120 centimeters inside the chute):
2. At the throat of the infeed funnel sit one or two horizontal steel drums armed with welded steel teeth or cleats, driven by high-torque hydraulic motors and pressed downward by heavy coil springs and hydraulic cylinders.
3. Their job is to crush wide, springy tree branches flat and pull them steadily inward at 0.6 to 1.0 meters per second (2 to 3.3 feet per second).
4. Stage 2: The Cutter Disc or Cutter Drum (Immediately behind the feed rollers:
5. Just centimeters behind the feed rollers spins the massive steel cutter disc (set at a 45-degree angle to the wood) or cylindrical cutter drum, fitted with bolted hardened-steel chipper knives spinning at 1,000 to 2,200 RPM.
6. The Fatal Coast-Down Trap: Even when you turn the diesel engine key completely OFF, a 400-kilogram (880-pound) steel cutter disc spinning at 1,500 RPM acts as a massive kinetic energy flywheel. It will continue spinning silently inside the steel hood for 2 to 5 minutes after the engine stops. Opening the cutter hood before verifying via the shaft view-port that rotation has reached zero RPM causes immediate amputation.

====================================================================================
     WOOD CHIPPER SAFETY CONTROLS & THE "FEED FROM THE SIDE + PUSH PADDLE" RULE
====================================================================================

                      [3-Sided Wrap-Around Control Bar]
                      * PUSH FORWARD (-->) = REVERSE.
                      * CENTER     (|)   = STOP.
                      * PULL BACK  (<--) = FORWARD FEED
                                     ||
                                     vv
       [Cutter Disc/Drum]    [Toothed Feed Rollers]     [Infeed Chute Table]
      +------------------+---------------------------+------------------------+
      |   (1,500 RPM)    |      ( ) Top Roller       |  [Internal Last-Chance]|
      |    / / / / /     |  <===                     |  [   Pull Cables      ]|
      |   / Knives /     |      ( ) Bottom Roller    |  <--- Feed Brush Here  |
      +------------------+---------------------------+------------------------+
                                                                 |
                                                                 |
        * OPERATOR STANDS TO THE SIDE OF THE CHUTE (Never Directly Behind.)
        * FEED BUTT END (CUT END) FIRST -> Turn & Walk Away Toward Roadside.
        * USE A WOODEN PUSH PADDLE for short branches (NEVER reach inside chute.).
====================================================================================

2. Why Operators Get Pulled Into the Feed Rollers: The Four Snag Mechanisms¶

1. Feeding Forked Branches Canopy-First Instead of Butt-First:
2. If you feed the bushy leafy tip of a branch into the rollers first, the wide stiff side-limbs sticking out of the thick butt end sweep rapidly inward like a closing bear trap as the branch enters the chute, hooking the operator's arms, waist, or helmet strap.
3. Mandatory Rule: Always feed the thick cut end (butt end) of the branch into the feed rollers first so that all side branches point backward and fold smoothly inward away from your body.
4. Standing Directly Behind the Infeed Chute Instead of at the Side Corner:
5. When a crooked or forked tree limb is crushed between the hydraulic feed rollers, the protruding butt end outside the chute can whip violently sideways, upward, or downward with hundreds of pounds of mechanical force. Standing directly behind the center of the infeed table puts you in the direct path of whipping limbs and directly in line to be pulled down the chute if snagged.
6. Mandatory Rule: Feed from the side corner of the infeed table, release the branch the instant the rollers bite, immediately turn 90 degrees away from the chute, and walk away toward the brush pile ("Feed, Release, Turn, and Walk Away").
7. Gauntlet Cuffed Gloves and Loose Clothing:
8. Traditional wide-cuffed leather gauntlet gloves have an open funnel at the wrist that catches on broken twig stubs sticking out of a moving branch. Because the branch is moving inward at 1 meter per second (3.3 feet per second), an operator standing at the edge of a 1.2-meter (4-foot) infeed table has only 1.0 to 1.2 seconds before their snagged glove reaches the steel feed teeth.
9. Mandatory Rule: Wear snug-fitting cuffless work gloves tucked inside tight elastic wrist sleeves (or gloves with breakaway Velcro cuffs), tuck all shirts in, and never wear climbing harnesses with dangling gear loops or carabiners while feeding a chipper.
10. Reaching Into the Chute to Push Short Rakings ("The Final Cleanup Trap"):
11. Nearly a third of non-fatal hand amputations in brush chippers happen during the final 10 minutes of a job when a worker scoops up an armful of short twigs, thorny rose/bramble clippings, and raked leaves and reaches their hands inside the metal funnel to shove them into the rollers.
12. Mandatory Rule: Never put your hands, arms, or feet past the outer lip of the infeed table. Push short brush or rakings into the rollers using a long-handled wooden push paddle or by laying the short twigs on top of a long sacrificial branch and letting the long branch carry them in.

Deep dive 2: Stump grinder hazards, carbide tooth shrapnel, kickback, and buried utilities¶

While wood chippers pull material inward, self-propelled and walk-behind stump grinders swing a heavy vertical steel cutting wheel armed with bolted tungsten-carbide teeth side-to-side across an exposed stump at 800 to 1,500 RPM:

1. The Three Primary Stump Grinder Trauma Mechanisms¶

1. उच्च गति कार्बाइड दाँत र रक रिकोचेट (30-Meter / 100-Foot Danger Zone:
2. रुखका थोप्लाहरू गाडेका ढुङ्गाहरू, कंक्रीटका टुक्राहरू, तार तार र फलामको कीलहरू वरिपरि बढ्छन्। जब घुम्ने टंगस्टन-कार्बाइड दाँतले जराको फ्लेयर फोहोर भित्र लुकेको ग्रेनाइट वा स्टिललाई प्रहार गर्छ, कि त चट्टानलाई १५०+ किमी/घन्टा (९३+ माइल प्रतिघण्टा) गतिमा फ्याकिन्छ वा ब्राज्ड कार्बाइडको टिप दाँत होल्डरबाट च्यात्छ र राइफलको गोली जस्तै बाहिर उड्छ।
3. नियम: सडक वा सिसाका झ्यालहरू नजिक पीस्दा ** अपरेटिङ स्टम्प ग्राइन्डरबाट **१५ देखि ३० मिटर (५० देखि १०० फीट) टाढा **सबै नजिकै बस्ने, पैदल यात्रु र सवारी साधनहरू राख्नुहोस्, पोर्टेबल जालको फोहोर बाधाहरू/प्लाइवुड ढालहरू।
4. Walk-Behind Stump Grinder Climb-Cut Kickback:
5. Smaller portable walk-behind stump grinders require the operator to pivot the handlebars laterally across the stump. If the operator plunges the front/upper edge of the wheel too deeply into a root instead of sweeping the bottom edge gradually through the top 2.5 to 5 centimeters (1 to 2 inches) of wood, the wheel climbs up onto the stump and lunges violently backward or sideways, knocking the operator down.
6. Striking Shallow Buried Gas Lines, Fiber-Optic Cables, and Primary Electrical Conductors:
7. Utility service drops (natural gas polyethylene service lines, residential 120/240V electrical cables, and telecommunications lines) are frequently buried just 15 to 45 centimeters (6 to 18 inches) below the lawn and become completely enveloped by growing tree roots.
8. अनिवार्य प्रि-ग्राइन्ड युटिलिटी लोकेट नियम: 811 (संयुक्त राज्य / क्यानडा), 1100 (अष्ट्रेलिया), वा राष्ट्रिय उपयोगिता नक्साहरू कम्तिमा 48 देखि 72 घण्टा अघि गाडिएको ग्यास र बिजुलीका लाइनहरू घाँसमा चिन्ह लगाइएका नभई कहिले पनि स्टम्प पीस नगर्नुहोस्।

====================================================================================
      STUMP GRINDER EXCLUSION ZONE & PROPER CUTTING WHEEL SWEEP GEOMETRY
====================================================================================

                      [OPERATOR AT DEADMAN CONTROLS]
                      (Behind Lexan Shield / Curtain)
                                    ||
              +---------------------+---------------------+
              |     15 to 30 Meter (50 to 100 Foot)       |
              |        Bystander Exclusion Radius         |
              |                                           |
              |         [Spinning Carbide Wheel]          |
              |                 (( (*) ))                 |
              |            <--- Sweep 2-5 cm --->         |
              |               /===========\               |
              |              /  TREE STUMP \              |
              +-------------------------------------------+
                   /                |                \
                  v                 v                 v
        [High-Velocity Rock & Carbide Tooth Ricochet Cone (Front & Sides)]
====================================================================================

गहिरो डाइभ 3: चिपर र स्टम्प ग्राइन्डर चोटहरूको लागि प्रि-हस्पिटल ट्रमा केयर¶

काठ चिपर वा स्टम्प ग्राइन्डरको चोटलाई प्रतिक्रिया दिँदा, उद्धारकर्ताहरूले तीन पटक-महत्वपूर्ण चिकित्सा आपतकालिन सामना गर्छन्:

1. विशाल चरम रक्तस्राव र चकनाचूर / कुचिएको अंगहरूको व्यवस्थापन¶

1. किन कुचिएको फिड-रोलर घाउहरू भ्रामक रूपमा बिस्तारै सुरुमा रगत बग्न सक्छ, त्यसपछि उफ्रिनुहोस्:
2. When a hand or forearm is drawn between two spiked hydraulic feed rollers under 1,000+ kilograms of clamping force, the radial and ulnar arteries are crushed and stretched. Initially, vessel spasm and roller compression may limit visible bleeding.
3. यद्यपि, हाइड्रोलिक रोलरलाई पाखुराबाट टाँसिएको तुरुन्तै (वा रक्तचाप बढ्दै जाँदा), ​​च्यातिएको धमनीहरू खुल्न र छिट्टै रक्तस्राव हुन सक्छ।
4. Protocol: Place a CoTCCC windlass tourniquet on the upper arm or thigh BEFORE lifting the hydraulic feed roller off a mangled limb. If the limb has already been pulled free or amputated, tighten the tourniquet 5 to 8 centimeters (2 to 3 inches) above the wound (or High and Tight in the armpit/groin if the wound extends across the elbow or knee) until all bright red bleeding ceases.
5. Gross Woodchip, Bark, and Soil Contamination (Tetanus and Polymicrobial Sepsis Risk):
6. Wounds caused by wood chippers and stump grinders drive bark fragments, soil bacteria (Clostridium tetani, Pseudomonas, Aeromonas, and fungal spores) deep into shredded muscle planes.
7. At the Scene: Do NOT spend time picking small wood splinters out of a bleeding wound or pouring hydrogen peroxide/alcohol inside, which delays transport and dislodges life-saving blood clots. Control bleeding with a tourniquet or sterile pressure dressing, splint the crushed limb, and let trauma surgeons perform high-volume operating-room debridement and administer IV broad-spectrum antibiotics and tetanus prophylaxis.

2. डोरी-स्न्याप घर्षण बर्न्स, डेग्लोभिङ, र ब्लन्ट टोर्सो ट्रमा¶

When a ground worker is struck or jerked by a climbing line ingested into a chipper: - Full-Thickness Rope Friction Burns and Ring/Glove Degloving: A synthetic rope accelerating through a worker's gloved or bare hands at 15 meters per second heats past 250 degrees Celsius (482 degrees Fahrenheit) by friction, slicing down to the flexor tendons and melting synthetic glove liner directly into the dermis. Cool the burn with clean running water or saline for 10 to 20 minutes, never peel melted synthetic glove plastic off raw tissue, and wrap loosely in non-adherent sterile dressings. - High-Energy Blunt Acceleration Trauma: If the rope yanked the worker off their feet and threw them against the steel chipper frame or ground, maintain strict manual inline cervical spine stabilization, monitor for pelvic fracture, flail chest, or tension pneumothorax, and keep the patient supine and warm.

क्षेत्रीय आपतकालीन नम्बरहरू र एजेन्सी प्रोटोकलहरू¶

बारम्बार सोधिने प्रश्नहरू¶

Which way do you push the safety bar on a wood chipper if someone's hand or glove is caught in the feed rollers?¶

On every standard commercial brush chipper (`ANSI Z133` / `EN 13525`), you must **PUSH the 3-sided wrap-around control bar FORWARD toward the machine (into the chute)** to stop and **REVERSE** the hydraulic feed rollers. Pulling the bar backward toward the street engages forward feed. This is engineered so that if an operator is snagged and pulled forward against the chute, their chest or arm slams into the bar and pushes it forward into reverse. In addition, pulling the **Last-Chance steel cables hanging inside the roof of the chute** will also trip the hydraulic valve into stop/reverse.

How can an arborist climbing rope kill a worker next to a wood chipper without the worker ever touching the machine?¶

If the tail end of a synthetic climbing line or rigging rope gets tangled in piled branches and is fed through the hydraulic feed rollers, it contacts the **1,500 RPM high-speed cutter drum or disc** immediately behind the rollers. The spinning cutter drum winds the rope up at **12 to 18 meters per second (40 to 60 feet per second)**, so fast that the rope becomes an invisible supersonic whip. Any ground worker standing in a loop of that rope on the pavement, or the climber tied into the other end up in the tree, is yanked into the steel hood of the chipper in **less than 0.25 seconds**. Never allow any rope within **3 to 5 meters (10 to 15 feet)** of the chipper infeed path.

Why should I feed branches into a wood chipper thick cut-end (butt-end) first and stand to the side?¶

Feeding the **thick cut end (butt end)** first makes sure that all smaller side limbs point backward away from the rollers and fold smoothly inward like closing an umbrella as the branch is drawn in. If you feed the bushy tip first, the stiff wide forks sticking out near the butt end sweep inward like a bear trap and snag your sleeves or gloves. Standing at the **side corner of the infeed table** (rather than directly behind the center) keeps your body out of the sweep path if a crooked limb whips sideways when crushed by the rollers.

Why is it dangerous to open the cutter housing of a wood chipper right after turning the engine key off?¶

व्यावसायिक काठ चिपर भित्रको ठोस स्टिल कटर डिस्क वा ड्रमको तौल **200 देखि 650 किलोग्राम (440 देखि 1,430 पाउण्ड)** हुन्छ र **1,000 देखि 2,200 RPM** मा कम घर्षण बियरिङहरूमा स्पिन हुन्छ। जब तपाइँ डिजेल इन्जिन बन्द गर्नुहुन्छ, त्यो विशाल स्टिल फ्लाईव्हील ** २ देखि ५ पूर्ण मिनेटको लागि चुपचाप तटीय रूपमा जारी रहन्छ **। कटर हुड खोल्दा वा डिस्क पूर्ण शून्य-RPM रोकिनु अघि डिस्चार्ज चुटमा पुग्दा तुरुन्तै अंगविच्छेदन हुनेछ। कुनै पनि मर्मतसम्भार गर्नु अघि सधैं कटर शाफ्टको खुला छेउमा हेर्नुहोस्, शून्य रोटेशन प्रमाणित गर्नुहोस्, इग्निशन कुञ्जी हटाउनुहोस्, र मेकानिकल स्टिल रोटर लक-पिन घुसाउनुहोस्।

काठको टुक्रामा छोटो टुक्राहरू, र्‍याकिङहरू र काँडादार ब्रश खुवाउने सबैभन्दा सुरक्षित तरिका के हो?¶

**फिड रोलरहरूमा छोटो सामग्री धकेल्न ** इन्फिड ट्रेको बाहिरी ओठको छेउमा आफ्नो हात, पाखुरा वा खुट्टा कहिल्यै नपुग्नुहोस्। यसको सट्टा, या त छोटो रैकिङ्हरू र ट्विगहरू **लामो हाँगाको माथि** ** तान्नुहोस् ताकि लामो शाखाले तिनीहरूलाई रोलरहरूमा लैजान्छ, वा **लामो ह्यान्डल काठको पुश प्याडल** (`at least 1.2 meters / 4 feet long`)। ब्रशलाई चिपरमा धकेल्न धातुको रेक, स्टिल बेलचा वा पिचफोर्क प्रयोग नगर्नुहोस्; यदि हाइड्रोलिक फिड रोलरहरूले स्टिलको उपकरण समातेर यसलाई 1,500 RPM चक्कुहरूमा तान्छन् भने, चकनाचुर धातु घातक छर्राको रूपमा चुटबाट बाहिर निस्कनेछ।

स्टम्प ग्राइन्डरहरूलाई किन 15-देखि-30-मिटर (50-देखि-100-फुट) बाइस्ट्यान्डर बहिष्करण क्षेत्र चाहिन्छ?¶

एउटा स्टम्प ग्राइन्डरले **800 देखि 1,500 RPM** मा बोल्ट गरिएको **टंगस्टन-कार्बाइड काट्ने दाँत**सँग सशस्त्र एक खुला ठाडो स्टिलको पाङ्ग्रालाई सिधै माटो र जरामा घुमाउँछ जसले बारम्बार गाडिएका ढुङ्गा, कंक्रीट र स्क्र्याप फलामलाई लुकाउँछ। जब एक घुम्ने कार्बाइड दाँतले गाडिएको चट्टानमा प्रहार गर्दछ, यसले ढुङ्गा, वा टंगस्टन कार्बाइडको टुक्रा टुक्रा **१५० किलोमिटर प्रति घण्टा (९३ माइल प्रति घण्टा)** मा बाहिर निस्कन्छ। सँधै 15 देखि 30 मिटर टाढा बस्नेहरू र सवारी साधनहरू टाढा राख्नुहोस्, पोर्टेबल प्लाईवुड वा भारी जालको मलबे स्क्रिनहरू सेट गर्नुहोस्, र **ANSI Z87.1+ सुरक्षा चश्मा** मा पूर्ण अनुहार ढाल लगाउनुहोस्। रेड क्रस, सेन्ट जोन एम्बुलेन्स, वा स्थानीय प्रदायकबाट प्रमाणित प्राथमिक उपचार, सीपीआर, र ब्लीड कोर्स रोकेर तपाईंको रूख चालक दल कुनै पनि क्षेत्र आपतकालिनका लागि तयार छ भनी सुनिश्चित गर्दछ।

सम्बन्धित गाइडहरू¶

• वुड chipper स्न्याग, डोरी उलझन, र फिड चुट सुरक्षा बार triage
• Walk-behind trencher, stump grinder, and directional drill strike
• चेनसा किकब्याक, चेन ब्रेक, र ब्यालिस्टिक नायलन च्याप्स
• Severe bleeding and windlass tourniquet application
• Traumatic amputation: finger, hand, and limb preservation

स्रोत र आधिकारिक निर्देशन¶

• अमेरिकन नेशनल स्ट्यान्डर्ड इन्स्टिच्युट (ANSI) र इन्टरनेशनल सोसाइटी अफ आर्बोरीकल्चर (ISA): ANSI Z133 आर्बोरीकल्चरल सञ्चालनका लागि सुरक्षा आवश्यकताहरू (खण्ड 8.6: ब्रस चिपर्स र खण्ड 8.7: स्टम्प कटरहरू, अनिवार्य रिभर्स फिड कन्ट्रोल बार, Pddles, Pddles, Last-Last-Control Bar नियमहरू)।
• व्यावसायिक सुरक्षा र स्वास्थ्य प्रशासन (OSHA, संयुक्त राज्य अमेरिका) र व्यावसायिक सुरक्षा र स्वास्थ्य (NIOSH) को लागि राष्ट्रिय संस्थान: *सुरक्षा र स्वास्थ्य सूचना बुलेटिन SHIB 04-16-2008 (काठ चिप्सका खतराहरू) र NIOSH FACE रिपोर्टहरू घातक रिगिंग रस्सीमा BIOSH।
• Health and Safety Executive (HSE, United Kingdom) and Arboriculture and Forestry Advisory Group (AFAG): Agriculture Information Sheet AIS38 (Brushwood Chippers: Safe Working Practices), AFAG Guide 604 (Woodchippers), AFAG Guide 606 (Stump Grinders), and BS EN 13525:2020.
• Committee on Tactical Combat Casualty Care (CoTCCC) and American College of Surgeons (ACS): Stop the Bleed Prehospital Protocols for High-And-Tight Extremity Windlass Tourniquet Application and Junctional Hemostatic Wound Packing.
• American Society for Surgery of the Hand (ASSH): Prehospital Preservation of Amputated Extremities and Mangled Hand/Forearm Crush Injuries.