BRIDGE · CIVIL AND EARTHWORK · FIXED BY STEP 01

One Bridge Takes Five Move-Ins and Pays One Mobilization

A single structure takes four to six separate trips in and out. The contract pays mobilization once, usually capped, usually paid down against early progress.

WHY IT IS A BRIDGE PROBLEM

A trade that stays on site until it finishes mobilizes once and demobilizes once. A bridge sub leaves and comes back because the structure itself forces the breaks in work, and every break means crane assembly and teardown, a lowboy move, a trailer, crew travel, and re-staking. The bid still carries one lump sum mobilization item covering the first trip.

WHAT IT COSTS

The size of it

Four unbudgeted remobs at $8K to $25K each is a six figure hole on one structure, and it surfaces on the P&L as a labor and equipment overrun with no cost code that explains where it came from.

OVERHEAD AT $1M–$5M

15%

CFOS target 14% for bridge.

GROSS MARGIN AT $1M–$5M

22%

CFOS target 24% for bridge.

NET PROFIT AT $1M–$5M

CFOS target 10% for bridge.

Bridge work doesn't hold continuous occupancy of the site. Foundations want a drill rig or a pile hammer and casing; substructure wants forms and a different crew. The girder set is a two to three day event with a big crane on it. Deck placement needs a screed and a finishing crew, then a cure window. Rail and joints follow, and approach slabs come later still. Between each phase sits a cure period, a DOT test break, or a delivery date you don't control. Widenings and stage construction add a full cycle per traffic phase on top of that.

WHAT TO DO

Three moves, in order

STEP 01

Open a numbered move-in cost code for each planned mobilization on the job you're running now, and start charging lowboy, assembly, travel, and staking to it this week.

STEP 02

Count the move-ins on the next bid before pricing anything, then load every trip past the first into the unit prices for the work that follows it.

STEP 03

Pull the remob total off your last three structures and give that number to whoever prices the next one.

THE FIX

Step 01: Job cost structure

Seven cost categories and three levels of granularity, built so the estimate and the ledger use the same words.

CFOS-01 · CHAPTER 1

Job cost codes that match how you bid the work

What this step changes, what it depends on, and how to tell it's installed.

BENCHMARKS

Bridge by revenue band

Every one of the 7 bands carries the CFOS target beside the published figure.

ACROSS EVERY TRADE

Cost codes the field ignores

You have 200 cost codes. The crews use four of them, and one is called Miscellaneous.

SAME TRADE

What else costs bridge contractors money

BRIDGE · CFOS-06

Your Girder Date Comes From the Casting Bed Calendar

You didn't buy beams, you bought a spot in a casting bed. The plant releases that spot when your shop drawings come back approved, and the calendar behind it belongs to somebody else.

BRIDGE · CFOS-04

Steel Adjustment Is a Box You Check at Letting

On a lot of DOT bridge lettings, steel price protection is elected item by item at bid time. Skip the election and you own the entire move yourself.

BRIDGE · CFOS-02

You Bid Erection by the Beam and Pay by the Day

Girder erection gets bid per beam or per structure. The crane, mats, rigging, and crew accrue by the day, and the day keeps running while the pick waits on someone else.

BRIDGE · CFOS-05

Girders in the Yard Can Be Billed Before They Ship

State specs let you get paid for girders stored at the fabrication plant. Most small bridge subs never file the forms and float the whole package for months.

SAME MECHANISM, OTHER TRADES

The same mechanism in other trades

CIVIL

Four mobilizations, one mob line item

You clear and grub in month one, come back for wet utilities, come back again for paving subgrade at closeout, and the contract still carries one mobilization line.

CONCRETE

Six Trips Back for Pads and Sidewalks, One Unit Price

You were first on the site and you're still coming back for stairs, pads, curbs, and exterior flatwork, all priced inside a per-yard number that assumed you never left.

DRYWALL

You Go Back Six Times And Nobody Signs A Ticket

You hung the corridor in March and you're still sending a guy back in June, one hole at a time, on somebody else's dime.

QUESTIONS

What bridge owners ask

How do you get paid for remobilization on a bridge job?

A single structure takes four to six separate trips in and out. The contract pays mobilization once, usually capped, usually paid down against early progress.

What does it cost?

Four unbudgeted remobs at $8K to $25K each is a six figure hole on one structure, and it surfaces on the P&L as a labor and equipment overrun with no cost code that explains where it came from.

What do I do first?

Open a numbered move-in cost code for each planned mobilization on the job you're running now, and start charging lowboy, assembly, travel, and staking to it this week.

What are bridge contractors supposed to be making?

Bridge runs 22% gross margin, 15% overhead and 7% net profit before taxes at $1M–$5M. The all-trade average is 7%, so this trade sits right on it. The CFOS target is 10%.

Which part of the system fixes it?

The step is number 01, job cost structure. Seven cost categories and three levels of granularity, built so the estimate and the ledger use the same words. It comes from chapter 1 of CONTROL: The Construction Financial Operating System.

AUTHOR

JOSH LUEBKER

MASTER ELECTRICIAN · 150+ PROJECTS · $2.1B+ MANAGED

Josh Luebker ran commercial construction projects before he ran the numbers behind them, on data centres, military bases, hospitals, and high-rises. He wrote CONTROL: The Construction Financial Operating System, which is an eight-step framework for commercial subcontractors, and it publishes on October 1, 2026. He is a master electrician who moved into the office and kept the field vocabulary.

Sulphur Prairie Operations LLC maintains the benchmark reference behind these figures. Every edition is reconciled against the newest CFMA survey release before it publishes here. Where a figure changes between editions, the older edition keeps its year in the title so a citation to it stays correct.