AGR-FIRE51-03 · Lesson 6 · 14 clock hours · lab
Ground Ladder Selection, Raise, and Placement
Objective. Students will select the correct ladder for a given building story and window height, raise it using single-firefighter and two-firefighter techniques, and position it at the proper climbing angle to NFPA 1001 Firefighter I standards.
⚠ Pending professional review
This lesson, its worked examples and its practice questions has not yet been verified by a licensed professional in the field or by a certification or approval body. It is a study draft and may contain errors. Do not use it as instructions for work on a job site or on live equipment. Always follow your instructor, your supervising professional, and current official references and regulations.
VoTechWorks program approval and accreditation are still in progress. Credentials are issued only by the certifying bodies named in each program, after their own exams.
Ground Ladder Selection, Raise, and Placement
Ground ladders are among the most important tools a firefighter carries. Used correctly, they provide rescue paths, ventilation access, and elevated attack positions. Used incorrectly, they injure firefighters and fail the victims they are meant to save. This lesson covers selection, raising, and safe placement to NFPA 1001 Firefighter I standards.
Ladder Types and When to Use Each
Four ladder types appear in today's lab.
Roof ladder — A single-section ladder with folding hooks at the tip. The hooks grip a roof ridge so a firefighter can work on a pitched roof without sliding. Select it when you need to move across a sloped roof surface.
Extension ladder — A two- or three-section ladder whose fly section travels up a halyard (rope) and is locked by spring-loaded pawls (dogs). Common sizes for structural work are 24 ft and 35 ft. Select an extension ladder when the target—a window sill, roof edge, or parapet—is beyond single-section reach.
Folding (attic) ladder — A narrow, hinged-rung ladder that folds flat for storage in tight compartments. Use it inside buildings to access attic hatches or confined openings.
A-frame (stepladder) — A self-supporting, two-sided ladder. Use it where no wall is available for leaning support, such as during overhaul on an open floor.
Ladder Components You Must Know
- Butt / butt spurs — The base end of the ladder; metal spurs bite into the ground to prevent slipping.
- Halyard — The rope (or cable) that extends and lowers the fly section on an extension ladder.
- Fly section — The upper, sliding section of an extension ladder.
- Pawls (dogs) — Spring-loaded hooks on the fly section that lock into the rungs of the bed section, holding the fly at the desired height.
- Tip — The very top of the ladder; on a roof ladder the tip carries the folding hooks.
- Bed section — The lower, fixed section of an extension ladder against which the fly travels.
- Dogs / pawls — Verify they are fully seated and locked before any climber steps on the ladder.
Selecting the Right Ladder for the Height
A rule of thumb: the extended ladder must reach the objective and still allow the correct climbing angle. For a second-story window the sill is typically 12–18 ft above grade; a 24-ft extension ladder is usually sufficient. A third-floor window or roof edge on a two-story building often requires a 35-ft ladder. Always confirm that the extended length exceeds the objective height enough to position the tip properly—for window rescue, the tip is placed at or just below the sill so the climber can step through; for roof access, the tip extends at least 3 rungs (approximately 3 ft) above the roof edge per NFPA 1001 guidelines.
The 70–75-Degree Climbing Angle
The climbing angle is critical for both safety and efficiency. Too steep and the ladder can tip backward; too shallow and it overloads the butt and may slide or fail. The standard climbing angle is 70–75 degrees from horizontal.
A practical field check: stand at the butt, toes touching the rail, arms extended horizontally—your hands should just reach a rung (the "arm's-length" method). An angle indicator tool gives a precise reading and is used in today's evaluation.
Raise Techniques
Single-firefighter flat raise to beam raise — Beginning from flat on the ground, the firefighter stands at the butt, foots the ladder, and walks hand-over-hand under the rungs (flat raise) until the ladder is vertical, then leans it against the structure (beam raise). Practice this sequence at ground level before working against the tower.
Single-firefighter extension ladder raise — After performing the beam raise, the firefighter pulls the halyard hand-over-hand to extend the fly to the needed height, then cleats or ties off the halyard so it cannot slip. Confirm pawls are locked. Adjust the butt distance to achieve 70–75 degrees and heel the ladder (maintain downward foot pressure on the butt) until it is secured.
Two-firefighter raise — Firefighter 1 (footing) stands at the butt spurs, heeling the ladder throughout. Firefighter 2 lifts at the tip end, walks forward under the ladder, and raises it to vertical while Firefighter 1 keeps the butt planted. Two-firefighter raises are required for ladders 28 ft and longer, or whenever ground conditions are poor. Communication between partners is continuous.
Heeling and Securing
The butt must be heeled at all times a ladder is in use. Heeling means a firefighter plants their feet against the butt spurs and grips the beams, applying downward and inward pressure. On hard or slick surfaces, additional securing—rope tied to a fixed anchor, ladder placed against a solid surface—may be required. Never leave a raised ladder unheeled and unattended.
PPE and Safety Rules for This Lab
- Full structural PPE (helmet, gloves, coat, boots, hood) is worn for all raises and climbing evolutions.
- Inspect every ladder before use: check for bent rungs, cracked beams, frayed halyard, and missing butt spurs.
- Call out "Ladder going up" before raising; bystanders clear the area beneath the tip's travel path.
- Never carry a raised ladder near overhead power lines.
- One climber at a time unless the ladder is specifically rated and directed otherwise.
- Climb the center of the ladder; maintain three points of contact at all times.
- Report any damaged equipment to the instructor immediately; remove it from service.
What Instructors Are Evaluating
Today's JPR checklist tracks: correct ladder selection for the scenario, proper beam raise sequence, pawls fully locked, halyard secured, butt heeled throughout, and a final climbing angle of 70–75 degrees confirmed by the angle indicator. Any critical safety error—unheeled butt during a climb, unlocked pawls, failure to inspect—results in an automatic re-attempt after remediation.
Key terms8
Butt spursMetal feet or spikes at the base of a ladder that dig into the ground surface to prevent the ladder from sliding outward.
HalyardThe rope or cable attached to the fly section of an extension ladder, used to raise and lower that section to the desired height.
Fly sectionThe upper, sliding section of an extension ladder that travels along the bed section to increase the ladder's overall length.
Pawls (dogs)Spring-loaded locking hooks on the fly section that engage the rungs of the bed section to hold the fly at the selected height.
Climbing angleThe angle formed between the ladder and the ground; NFPA 1001 specifies 70–75 degrees from horizontal for safe climbing.
HeelingThe act of a firefighter placing their feet against the butt spurs and gripping the beams to stabilize the base of a raised ladder while another firefighter climbs.
Beam raiseThe technique of lifting a ladder from a flat or angled position to vertical and leaning it against a structure, using the ladder's beams as the structural elements during the lift.
TipThe topmost end of a ladder; on a roof ladder it carries folding hooks; for roof access it should extend at least 3 rungs above the roof edge.
Worked examples3
1. A second-floor window sill is measured at 14 ft above grade. You need to position the ladder tip at the sill. If the correct climbing angle is 70–75 degrees, what horizontal distance should the butt be placed from the base of the building?
- Step 1 — Identify the vertical rise: the tip must reach 14 ft (the sill height), so the vertical component is approximately 14 ft.
- Step 2 — Use the tangent relationship: horizontal distance = vertical rise ÷ tan(angle). At 75 degrees, tan(75°) ≈ 3.73; at 70 degrees, tan(70°) ≈ 2.75.
- Step 3 — Calculate the range. At 75°: 14 ÷ 3.73 ≈ 3.75 ft. At 70°: 14 ÷ 2.75 ≈ 5.09 ft.
- Step 4 — The butt should be placed approximately 3.75 ft to 5.1 ft from the base of the building to achieve a 70–75 degree climbing angle with the tip at 14 ft.
Answer: Place the butt roughly 3.75 ft to 5.1 ft from the building wall. In the field, verify with the arm's-length check or an angle indicator before allowing anyone to climb.
2. You are ordered to access a roof edge on a two-story training tower. The roof edge is 18 ft above grade. NFPA 1001 requires the tip to extend at least 3 ft (approximately 3 rungs) above the roof edge. What minimum extended ladder length do you need?
- Step 1 — Determine required tip height: 18 ft (roof edge) + 3 ft (above-roof extension) = 21 ft.
- Step 2 — Account for climbing angle: when the ladder leans at 70–75 degrees rather than straight vertical, the along-the-ladder length (hypotenuse) is slightly greater than the vertical rise. At 75°, ladder length = vertical rise ÷ sin(75°) = 21 ÷ 0.966 ≈ 21.7 ft.
- Step 3 — Add a practical margin; a 24-ft extension ladder extended to roughly 22 ft covers this scenario.
- Step 4 — Confirm: a 24-ft extension ladder is the appropriate selection for this evolution.
Answer: A 24-ft extension ladder extended to approximately 22 ft meets the requirement. Always confirm extension and pawl lock before climbing.
3. During a two-firefighter raise, Firefighter 2 asks how far to stand from the building so the 35-ft ladder reaches a roof edge at 28 ft with 3 ft of tip above the edge. Using a 75-degree angle, calculate the approximate butt distance.
- Step 1 — Required tip height: 28 ft + 3 ft = 31 ft.
- Step 2 — Horizontal butt distance = vertical rise ÷ tan(75°) = 31 ÷ 3.73 ≈ 8.3 ft.
- Step 3 — Verify ladder length is sufficient: ladder length along beam = 31 ÷ sin(75°) = 31 ÷ 0.966 ≈ 32.1 ft, which is within the 35-ft ladder's capacity.
- Step 4 — Place the butt approximately 8.3 ft from the building and confirm the angle with an indicator before climbing.
Answer: Approximately 8.3 ft from the building base. The 35-ft ladder is adequate; confirm pawls locked and butt heeled before any firefighter climbs.
The math in this lesson1
Learners use tangent of 70° and 75° to find butt distance for a ladder reaching a 14 ft sill.
G-SRT.8
In class: Ground-level familiarization with ladder types (roof ladder, extension ladder, folding/attic ladder, A-frame) including identification of components—butt spurs, halyard, fly, pawls, and tip—using a component-labeling worksheet. · Phased raise drill progressing from flat raise to beam raise, then full single-firefighter and two-firefighter extension ladder raises against a training tower; instructor provides real-time verbal coaching and students use a self-evaluation form after each attempt. · Ladder placement accuracy exercise: instructor calls a scenario (e.g., second-floor window rescue), student selects ladder, raises, and locks in a 70–75-degree climbing angle verified with an angle indicator; student must climb to tip, tag a marker, and descend safely.
Materials: Roof ladder, single extension ladder, 24-foot and 35-foot extension ladders, folding ladder, training tower (minimum two stories), rope halyard, angle indicator, NFPA 1001 Firefighter I JPR checklist, IFSTA Essentials Chapter on ladders
Check: Psychomotor JPR checklist for one single-firefighter raise and one two-firefighter raise; student must achieve all critical steps (locking pawls, heel secured, correct angle) with no critical safety errors; ladder angle must fall within 70–75 degrees as verified by the instructor or angle tool.
Practice check8
Answer each question, then check it. Nothing is recorded; this is your own practice.
Record this lesson on my transcript. Sign in with your key and enrollment email to record lessons (enroll free if you have no key). This page stays open to read and practise.