The Structural Cut Approval SOP

Purpose

No one on the crew cuts, bores, notches or cores a structural member beyond its published limits on their own judgment. When a needed hole falls outside the limits, or lands in a member with no field limits at all, the work stops, the member is documented, and the cut happens only after a written approval and repair detail arrive from whoever designed that member. Without it, the shop finds out what a cut did when a floor sags years later, and the job record shows only that a pipe went in.

Scope

Covered. Any planned cut in:

• sawn lumber where the hole or notch exceeds the limits in Notching and Boring Limits in Wood Framing, including a top plate cut past 50 percent of its width without the strap that card describes;
• an I-joist outside its manufacturer's hole chart;
• LVL, glulam, parallel-strand lumber or any beam or header, at any size;
• a truss member of any kind (chord or web, any size);
• a post-tensioned slab, at any depth, until a scan has cleared the spot.

Not covered. Cuts inside published limits, which proceed and are logged under the penetration record SOP. Fire-separation and envelope restoration, which the closing checklist owns. Damage someone else already did: you photograph it and tell the customer in writing (steps 2 and 3), and repair it only if they engage you.

Roles and responsibilities

The handoff that fails is lead to tech. The tech does not get a phone summary; the tech gets the written detail in hand, or the cut does not happen.

Procedure

1. Stop at the first sign the cut is outside the limits, and leave the member as it is. Triggers: the measured hole or notch exceeds the sawn-lumber limits, the member carries a stamp naming an engineered product, it is a truss, or the slab is marked post-tensioned or you cannot rule that out. Acceptance: no material removed after the trigger, and any pilot hole or partial cut left as it is. Wrong looks like finishing a half-bored hole "since it is started". Stop rule: if a cut already made exceeds the limit, the span gets no new load (stored material, foot traffic, equipment) until the approver answers. Hazard: a partly cut beam or joist can fail suddenly, so nobody stands on or works under the affected span while it is unsupported, and a post-tensioned slab gets no further drilling at all, because a tensioned tendon can release with force through the surface.

2. Document the member so an approver who never visits can decide. Photos end to end, a close photo of every stamp or truss tag, depth, width and span to the nearest 1/4 in, direction of span and what bears on it, and the proposed hole size with its distance from each support and each edge. Acceptance: photo set and dimensioned sketch filed before the tech leaves, every dimension measured. Wrong looks like one wide shot and "it's a beam in the basement". Stop rule: uncover a hidden stamp only enough to read it, and record "unidentified" rather than guess, because the request route depends on it. Hazard: in an attic, weight goes on framing only, never on ceiling drywall between members, and pulling insulation means a respirator for fibers and dust under a written program per 29 CFR 1910.134.

3. Tell the customer in writing that the work is paused. A text or email from the job: the member, why the route needs approval, and that a third party decides. Acceptance: a dated notice in the record, with their reply or the time you left a message. Wrong looks like rerouting silently when the reroute changes cost or appearance. Stop rule: if the customer says cut anyway, you do not, and you record their instruction and your refusal in the same entry. Hazard: none at this step, it is a conversation.

4. Identify the one party who can approve this member. An I-joist, LVL or glulam goes to the technical service named on the stamp; a truss to the truss designer through its manufacturer, using the tag; a post-tensioned slab to the engineer of record or the builder holding the tendon drawings; sawn lumber beyond limits, or anything unidentified, to a registered design professional (licensed engineer or architect) the customer engages. Acceptance: one named approver and a contact route recorded. Wrong looks like asking the lumber yard, the inspector or a framer friend, none of whom can issue a detail. Stop rule: no findable designer means a registered design professional, and the job stays paused until one is engaged. Hazard: none at this step.

5. Send a written request that makes the answer possible. Attach the step 2 set and ask three things: is the cut acceptable as proposed, if not what size or location is, and what reinforcement goes with it. Acceptance: a sent request on file and a follow-up date no more than 3 business days out. Wrong looks like a phone call that produces a verbal "should be fine" nobody can produce later. Stop rule: a phone answer gets a written restatement sent back for confirmation, and nothing is approved until it is confirmed in writing. Hazard: none at this step.

6. Read the approval against the job before anyone cuts. The answer must name the member, hole size and location, and the repair detail with materials and fasteners. Acceptance: every value matches a measured site condition, and any permit the detail or jurisdiction requires is applied for. Wrong looks like a generic hole chart sent as "approval", or a detail for another span. Stop rule: any mismatch goes back to the approver in writing; nobody adapts an engineer's detail in the field. Hazard: none at this step, it is a desk check.

7. Get the customer's authorization for the approved scope. The detail usually adds hours and material, sometimes an engineering fee the customer pays directly. Acceptance: written authorization naming the detail by date and author. Wrong looks like starting and settling scope later. Stop rule: if the customer declines, the cut does not happen; offer a reroute inside limits or close with the member untouched and documented. Hazard: none at this step.

8. Execute the detail exactly, and only the detail. The tech gets the written detail in hand. Reinforcement goes in the order the detail states, the hole at the approved size, each stage photographed. Acceptance: as-built photos showing size, location and every fastener, matching the detail one for one. Wrong looks like a substituted fastener or an extra hole. Stop rule: if the opened site differs (a hidden splice, rot, a wire in the path), stop and return to step 6. Hazard: cutting overhead means eye protection and a dust control suited to the material, a slab means the coring procedure's water feed and silica controls, and any jack or shore the detail requires stays until the detail releases it, with nobody under a load carried only by a jack.

9. Close out with the inspection and the restore. Call any permit inspection before covering, then restore what the cut went through per the closing checklist. Acceptance: inspection passed or stated not required, restoration logged, detail, photos and authorization filed together. Wrong looks like drywall over reinforcement nobody inspected. Stop rule: a failed inspection returns the job to step 6 with the note attached. Hazard: before water, gas or power goes back into a system near the work, check for a fastener through a line or cable and pressure-test or prove the circuit as that trade's procedure requires.

The record this produces

One structural approval entry on the job, carrying: the trigger and who stopped the work; the photo set and dimensioned sketch; the customer notice and any instruction to cut anyway with the refusal; the approver's name and the request sent; the written approval and detail; the customer authorization; as-built photos; inspection result; and the penetration record reference. The office reads it when the customer sells the house, when the same member comes up on a later call, and when anyone asks why a joist has a sister beside it.

A worked pass

Job. A new 2 in drain for a basement bar sink, routed through the floor framing to reach the stack.

Step 1. The tech, laying out the route, finds the member in the way is not a 2x10 like its neighbors but a 3-1/2 in by 11-7/8 in member with a printed stamp: an LVL, carrying the wall above. Trigger met; nothing drilled. No pilot hole exists. Pass.

Step 2. Photos of the full member and its stamp, read as an LVL with a mill and a product line legible. Span measured at 13 ft 6 in between posts. Proposed hole: 2-1/2 in, centered in the depth, 4 ft 2 in from the north post. Wall above noted as bearing. Pass.

Step 3. Email to the customer: the route crosses a beam that carries the wall above, the beam's maker decides whether it can be drilled, the work is paused. Customer replies within the hour, agreeing. Pass.

Step 4. Approver identified as the manufacturer's technical service named on the stamp. Pass.

Step 5. Request sent with photos and sketch, follow-up set for 2 business days later. On day 2, the technical service rep calls: the hole is "probably fine, keep it in the middle third of the depth." Step 5 fails. Verbal answer only, and the tech's lead is tempted, because the bar install is booked for the next morning. Stop rule taken: the lead emails a restatement and asks for written confirmation. The written reply, on day 4, does not approve it: holes in that product are permitted only within a zone defined by distance from the supports, and the proposed location sits inside the zone near the post where no hole is permitted.

Step 6. The written answer gives an alternative: a hole of the same size moved to a point 6 ft 9 in from the north post, which the rep confirms is inside the permitted zone, no reinforcement required. Site check: that location falls between two existing joist hangers, clear of both. Values match. Permit: the jurisdiction covers this under the plumbing permit already pulled. Pass.

Step 7. The new route adds about 1.5 hours of pipe and fittings. Customer authorizes in writing. Pass.

Steps 8 and 9. Hole bored at the approved point, photographed with a tape in frame. The plumbing rough inspection passes with the approval letter on site. The bar install ran two days late. Had the verbal answer been taken, the hole would have gone in the one zone the maker prohibits, beside a post carrying a bearing wall.

References

• International Residential Code, 2021 edition, R502.8 (drilling and notching of floor framing, including R502.8.2 for engineered wood products), R602.6.1 (top plates) and R802.10 (trusses, including alterations), as adopted by your jurisdiction
• Post-Tensioning Institute guidance on post-tensioned slabs-on-ground and penetrations
• 29 CFR 1910.134, respiratory protection programs
• See related: Before You Cut: The Four Things a Hole Can Break; Notching and Boring Limits in Wood Framing; Engineered I-Joists and the Hole Chart; LVL, Glulam and Beams You Never Drill Without Approval; Restoring What You Cut Through: The Closing Checklist