🚧 Under construction — VoTechWorks is being built. A free tech program — complimentary, as our commitment to get America working.
voTechWorksGrade 13 · a vocational technology learning center, by urbanicity
newSchoolWorks.com › VoTechWorks › Agriculture, Environment & Public Service › Firefighting / Public Safety › Fire Suppression: Tactics, Hose Operations, and Structural Attack › Lesson 6
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

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

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?
  1. Step 1 — Identify the vertical rise: the tip must reach 14 ft (the sill height), so the vertical component is approximately 14 ft.
  2. 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.
  3. Step 3 — Calculate the range. At 75°: 14 ÷ 3.73 ≈ 3.75 ft. At 70°: 14 ÷ 2.75 ≈ 5.09 ft.
  4. 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?
  1. Step 1 — Determine required tip height: 18 ft (roof edge) + 3 ft (above-roof extension) = 21 ft.
  2. 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.
  3. Step 3 — Add a practical margin; a 24-ft extension ladder extended to roughly 22 ft covers this scenario.
  4. 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.
  1. Step 1 — Required tip height: 28 ft + 3 ft = 31 ft.
  2. Step 2 — Horizontal butt distance = vertical rise ÷ tan(75°) = 31 ÷ 3.73 ≈ 8.3 ft.
  3. 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.
  4. 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
Brush up in the math halls at newSchoolWorks.com:
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.

Firefighter I — Ground Ladders
1. Which ladder component locks the fly section at the desired extended height?
Firefighter I — Ground Ladders
2. NFPA 1001 specifies that when a ladder is used to access a roof, the tip should extend above the roof edge by at least:
Firefighter I — Ground Ladders
3. A firefighter performing a single-firefighter beam raise should confirm which action immediately after leaning the ladder against the structure and before allowing anyone to climb?
Firefighter I — Ground Ladders
4. What is the correct climbing angle for a ground ladder per NFPA 1001?
Firefighter I — Ground Ladders
5. Which ladder type is best suited for accessing a pitched roof and providing a stable working position while a firefighter performs ventilation?
Firefighter I — Ground Ladders
6. During a two-firefighter extension ladder raise, which firefighter is responsible for heeling the butt throughout the entire raise and while a firefighter climbs?
Firefighter I — Ground Ladders
7. Before any raise evolution, a firefighter should inspect a ground ladder. Which finding requires the ladder to be immediately removed from service?
Firefighter I — Ground Ladders
8. A scenario calls for rescuing a victim from a third-floor window where the sill is approximately 24 ft above grade and the tip must be positioned at sill level. Which ladder is most appropriate?
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.