Selected projects in Manhattan
New construction Metric is inspecting now or has recently completed in Manhattan, from 35,000 to 335,000 square feet. Client references are available on request.
105 East 118th Street
Structural, foundation, masonry, plumbing, architectural and SWPPP inspections
500 East 81st Street
All required special inspections
In Manhattan the rock comes to you
Manhattan sits on schist, and in much of the island it is not far down. It breaks the surface in the parks — in Central Park, and at Marcus Garvey Park in Harlem, a few blocks from the twenty-story job above. In East Harlem the picture is mixed: marble makes up part of the bedrock there, rather than the schist that underlies most of the island.
That is the opposite of a Brooklyn problem. Instead of wondering what is holding the building up, you are working out how to get the rock out of the way without damaging whatever is standing a few feet from your property line. Bedrock depth across the island varies far more than the familiar story about skyscrapers following shallow rock suggests — the deepest bedrock in Manhattan is under the Lower East Side, where there are no towers at all.
The real constraint is the lot, not the soil
A Manhattan site is usually hemmed in on two or three sides by occupied buildings, with no room to lay anything down. Concrete arrives and goes straight in; there is no stockpile and rarely a second chance at a pour. Excavation happens next to neighbors who are home. Underpinning, monitoring and tenant protection stop being line items and become the schedule.
None of that changes which categories are on your TR1. It changes how the inspections have to be run: more coordination, less tolerance for a missed window, and an inspector who can be there when the truck is, not an hour later.
Sources: NYC Parks, Geological History of New York City; Bedrock topography of Manhattan, Building the Skyline.
The inspections a Manhattan site tends to need
Your TR1 is what decides, not the borough. But on a tight island lot these are the categories that set the pace.
The buildings on either side
Underpinning at every pit, and operations influencing adjacent structures before excavation. This is the category that stops Manhattan jobs. See shoring, underpinning and monitoring adjacent buildings.
Excavation support
Sheeting, shoring and bracing inspected before excavation, with subgrade checked before footings. On rock the question is not bearing capacity, it is what the removal does to the neighbors.
Tenant protection
Where people are still living in the building, the tenant protection plan is inspected before and during the work — not signed once and filed.
Concrete, with no second chance
Design mix (TR3) before the first pour, sampling and testing (TR2) every pour, cast-in-place inspection at every pour and when the rebar is complete. With no laydown area, sampling happens at the truck or it does not happen.
High-rise structure
Twenty floors means the same categories repeated floor after floor, plus the bulkhead at the top. Consistency over a year matters more than any single visit.
Everything on one TR1
Structural, foundation, masonry, plumbing, architectural and SWPPP, as on the East Harlem job. The full list of categories is in our TR1 checklist for general contractors.
Questions we get from Manhattan contractors
You are on Long Island. Can you cover a Manhattan schedule?
Yes, and we do. The office and laboratory are at 184 Engineers Drive in Hicksville, and inspectors go out from there to all five boroughs. The projects above are ours from the first footing to sign-off, not subcontracted. What matters on a Manhattan job is being there in the window, and that is a scheduling question, not a distance question.
How much notice do you need for an inspection?
As a working rule: one business day for scheduled pours and steel inspections; same day for sampling at the truck if an inspector is already on site; about a week for anything that needs the laboratory ready, such as pile load tests, prisms or large sampling programs.
We have no room for a laydown area. How does sampling work?
At the truck. The inspector takes the sample as the concrete arrives, casts the cylinders on site, and they go back to our laboratory in Hicksville for curing and breaking. Nothing has to be stored on your site beyond the initial cure.
The neighboring building is occupied. What does that add?
Operations influencing adjacent structures, underpinning at each pit, and, where tenants remain, the tenant protection plan — all witnessed, all before or during the work rather than after. These are also the items most likely to be looked at closely if anything goes wrong next door.
Does my job need a Class 1 agency?
It depends on the categories on your permit, not on where the job is. What a Class 1 special inspection agency is explains which categories require accreditation rather than plain registration — and why that distinction matters when the TR1 is signed.
Working on something that needs a Class 1 agency?
Send the drawings or the TR1. We call you back within the hour during office hours (Mon–Fri, 7 AM–4:30 PM ET) with the categories we cover and a quote.