Ladder and scaffold takeoff: 7 steps before pricing

Key takeaways

• List access points by floor and trade, then check them on site.
• Separate vertical ladder reach from length along the rails.
• Check base space, footing and anchor needs before pricing.
• Count scaffold levels, platforms, access, ties and bracing separately.

A ladder that is one size too short means a second ladder, a rental extension, or a crew working from a bad position. A scaffold that is missing one level means a change order. Most of these gaps come from the same place: the access was never counted as a line item, so nobody priced it.

This post walks through the counts to make before you put a number on the work. Three of them are hard numbers from published safety guidance: how far a ladder must extend past the landing, how far the base must sit from the wall, and the height at which a worker needs fall protection. The rest of the count is about the scaffold itself, which you can measure from the plans and confirm on a site walk. Rules differ from place to place, so treat the numbers here as the starting point for your local check, not the final word for your job.

1. List every point where a worker has to climb or stand up

Start with the plans, not the price sheet. Go through each trade and each floor, and write down every spot where someone has to get above floor level to do the work. That includes the obvious cases, like a ceiling install or a roof edge, and the less obvious ones, like a light fitting over a stairwell, a valve on a mechanical room wall, or a sign on an exterior face.

For each point, record three things: the height of the work surface, the height of the landing the worker will stand on to reach it, and whether the work is done with one hand or two. The landing height is the number that drives everything else. If the work sits on a raised slab, a mezzanine, or a ledge, the landing is that surface, not the floor below.

Do this on the plans first, using the section drawings and the elevations. Dimension the ceiling heights, the parapet heights, and the soffits. Where the plans show a note such as "field verify" or leave a height blank, mark it as an open item. Those open items are where change orders come from. For drawing measurements, check your takeoff scale setup before counting access.

Then walk the site and check every point against your list. Plans often show finished heights, and a site may have a half-built slab, a temporary ceiling, or a column that was not drawn. Measure the real landing height with a tape or a laser, and note the photo and the location in your takeoff. A height you measured yourself is much easier to defend in a bid review than one you copied from a drawing.

Keep the list in one place, sorted by floor and by trade.

2. Separate ladder reach from rail length

The first hard number is the extension. That gives a worker who steps off the ladder onto a landing something to hold above the landing, instead of reaching for a rail or a wall while balancing on the top rung.

Use the height of the landing surface, not the height of the work. CCOHS says to extend the ladder at least 1 m (3 ft) above the landing platform or the point of support. The required vertical top height is the landing height plus that extension; the sloping rail length is longer than the vertical reach.

This is where estimators often go wrong. They take the height of the ceiling and buy a ladder that reaches it. A ladder that reaches the ceiling exactly has no extension above the landing, and the worker has to step off with nothing to hold.

Write the required top height on each line of the takeoff. Then write the ladder length you priced, and the vertical reach it provides at the required set-out. If that reach falls short, you have a line that needs a decision: a longer ladder, a platform, or a different access method. Do not let that line pass through the estimate unpriced.

For a job with many points at different heights, group the points by landing height. Several points at one landing height usually share one ladder size, so the rental order can be written once and the labor can be counted by group.

3. Set the base with the 4-to-1 rule and check the 75 degree pitch

The second hard number is the set-out. The CCOHS guidance on portable ladders describes the 4-to-1 rule: for every 4 feet up, place the base of the ladder 1 foot from the wall or the upper support it rests against. The same guidance says this placement gives a pitch of 75 degrees, which it describes as the ideal angle for climber balance and ladder strength, and which helps keep the ladder from slipping.

The set-out is the distance from the wall to the foot of the ladder. It matters for the takeoff because it decides where the ladder can stand. If the work is at a point where the base cannot be placed at the right distance, the ladder cannot be used there, and you need a different access method.

Use the rule to check each access point on the plans. So a higher top means a larger setback, and the setback needs real floor space. Ask two questions for each point. Is there clear floor space for the base at the set-out distance? Is there a wall or a structure to rest the top against at the right height? A ladder needs a footprint, and that footprint is space the crew cannot use for anything else. If a spot fails either check, the access line changes to a platform or a lift, and the cost goes up.

Watch for points where the base would sit in a walkway, a doorway, or a traffic lane. The 4-to-1 rule tells you where the base has to go, not whether it is safe to put it there. A base in a traffic lane means barricades, a spotter, or a different method, and each of those is a cost to add to the line.

4. Flag height and both-hands work for fall protection

The third hard number is a height where the work changes. The CCOHS guidance says a worker should wear a safety harness and tie the lanyard off to a proper anchor when working 3 m (10 ft) or more off the ground, or when working with both hands. The anchor can be a designed fixed support, a temporary fixed support, or an existing structural feature or piece of equipment.

For the takeoff, this is a flag.

Three things belong on the takeoff for each flagged point. First, the harness and lanyard for each worker on that task. Second, the anchor: is there a structure already designed to take a load, or does someone have to install a temporary fixed support? Third, the time to set up and remove the anchor and to inspect it. Estimators often price the harness and forget the anchor, or they assume an existing beam will take the load without checking with the engineer or the site.

Do not guess at the anchor. If you do not know whether a structure is suitable, write it down as an open item and price the temporary option until someone confirms it. A temporary anchor adds labor and material. An assumed anchor that turns out to be unsuitable adds a stop-work, a redesign, and a delay, and those costs are much larger.

Installing a light fitting, drilling a ceiling, or running conduit overhead puts both hands on the work. Read the task as well as the height on the drawing. Use the related fall-protection takeoff when checking those cost lines.

5. Check the footing and the ground before you count the ladder

Before any ladder line is priced, check the ground under it. The CCOHS guidance on extension ladders says to place ladders on a firm, level surface and ensure the footing is secure. That sounds obvious, but a ladder on a sloped sidewalk, a soft lawn, a wet slab, or a loose pallet is a real risk, and the cost of dealing with it is often missing from the bid.

On the site walk, look at the ground at every access point. Is it level enough for a ladder base? Is it firm, or is it soil that will sink under a load? Is there a drain, a curb, or a step that the base will land on? If a base has to sit on an uneven surface, you may need levelers, a base plate, or a different access method, and each of those is a line item.

Check for overhead hazards too. A ladder needs a clear path up and down and clear space at the top. Note any overhead lines, cable runs, or ductwork that the top of the ladder or the worker's reach would pass through. If the site has an overhead hazard near an access point, the access plan changes with it, and that change belongs on the takeoff before the price goes out.

Mark any point where the footing or the ground is not good enough as an open item. Then decide: either the ground gets fixed before the job starts, which is a site cost, or the access moves to a platform, which is a different cost. Either way, the line should not go into the estimate as a plain ladder.

6. Count the scaffold by level, platform and access

The rest of the count is the scaffold. Unlike the ladder numbers, the scaffold count depends on the design of the structure and the requirements of the work, so measure it from the plans and confirm it on site. Get the exact rules for the scaffold type you plan to use from the regulator in your area, and from the scaffold supplier's design drawings.

Start with the levels. For each scaffold, count the working levels from the lowest platform to the highest. Each level is a separate set of components, a separate set of planks, and a separate set of guardrails, and each one needs its own line on the takeoff.

Next, count the platforms on each level. The platform is the working surface, usually planks or decking. Measure the length of each platform run and the number of planks it needs. Note where each platform ends, and whether the end is at a wall, a corner, or an open edge. An open edge is where a worker can fall, and it is where guardrails, toeboards, or a second plank line may be needed.

Then count the access. A scaffold is only useful if a worker can get on and off it. Count the ladders, stairs, or stair towers that connect the levels. Note where each access point sits on the plan and how far the worker has to walk to reach the work. A scaffold with one access point at one end and the work at the other is slower to use, and that time belongs in the labor estimate.

Count the ties and the bracing. A scaffold tied to the building needs ties at set intervals, and the ties have to go into a structure that will hold them. Note where the building is not suitable for ties, and where the design calls for a different support. This is often where a scaffold bid goes wrong, because the ties are assumed rather than checked.

Finally, check how each platform is decked and whether the planks are fixed. Loose planks move under load and become a trip hazard. Where planks have to overlap, the Ohio administrative rule for planking says that all planking of platforms shall be overlapped a minimum of twelve inches (30.5 centimeters) or secured from movement. Whatever rule applies where you work, count the extra planks and the fixings in the takeoff rather than assuming the crew will add them on the day. The exact detail depends on the scaffold type and the place, so confirm it with the supplier or the regulator.

7. Turn the counts into takeoff lines and a price

Once you have the points, the heights, the ground checks, and the scaffold counts, turn them into takeoff lines. Group them so the rental order, the labor, and the materials can be read from the same sheet.

For ladders, price the rental or purchase by length and by the number of days needed. Add a line for setup and removal, since placing a ladder at the right set-out and checking the top height takes time. Add a line for each point that needs a platform, a lift, or a base leveler in place of a plain ladder. Do not bury those costs inside a general allowance, because the reviewer will ask where they came from.

For fall protection, price the harness and lanyard for each worker on each flagged task, and the anchor for each point. Include the time to set up and inspect the anchor. If the anchor is temporary, price the material and the labor to install and remove it. If the anchor is an existing structure, price the time to confirm it is suitable, and note who will sign off on it.

For the scaffold, price by level and by platform length, then add the access, the ties, the bracing, and the decking. Add the extra planks and fixings that the design calls for. If the scaffold has to be erected in stages to fit the work, price each stage separately, since the crew will be on site for each one.

Keep the open items on their own list. Each one should have a name, a location on the plans, the reason it is open, and the cost of each possible answer. When the answer comes in, the line moves from open to priced. If it does not come in before the bid goes out, state the assumption on the bid so the client knows what it covers.

Last, check the whole takeoff against the plans. Walk each floor on the list and confirm that every point is in the takeoff, every landing height has a ladder or scaffold line, and every flagged point has its fall protection. A takeoff that matches the plans is far easier to defend than one that matches the estimator's memory of the site.

Ladder and scaffold access is not glamorous work, and it is easy to treat as a small allowance at the end of an estimate. Count it the same way you count the structure: point by point, with the numbers written down and the open items visible.

Illustrative example: group access points before pricing

An illustrative takeoff has 20 access points. Of those, 10 share one landing height and 10 share another. Group the points by landing height to check ladder sizes, then check each location for base space, footing and both-hands work. Shared heights help organize the rental order; they do not remove the need to check each point or count setup labor.

Today, choose one floor, list its access points and mark every unconfirmed height or anchor before pricing it.

Related guides: Guardrail and access-zone lengths: 3 takeoff measures · Asbestos and ladder checks for demolition bids: 5 areas · Buried utility takeoff: three limits before bids.

Questions and answers

Does landing height equal ladder length?

No: the ladder's sloping rails must provide the required vertical reach at the correct set-out. Record both measurements before choosing a size.

What belongs in a scaffold price?

Include levels, platform lengths, access, ties, bracing, decking and setup stages. Check the design and site conditions before closing the estimate.