📚 Part of our Why Buildings Fail series →
It happened on the first day of the new school year. At 7:37 AM on June 8, 2026, a magnitude 7.8 earthquake struck off Sarangani — and at Matanao National High School in Davao del Sur, a building came down. It wasn't a building anyone was surprised by: it was one of three buildings condemned and cordoned off since the 2019 Mindanao earthquakes, left standing for seven years, never demolished. By the time DepEd finished counting, 8,642 schools across six regions had been affected.
We've already covered the engineering behind the M7.8 Mindanao quake and the week-one damage picture. This piece is about one specific building type the code treats differently from everything else you build: the classroom your child sits in every morning.
Classroom damage figures per DepEd's June 10, 2026 assessment update — an increase from its initial June 9 count as inspections continued.
Correction, 19 September 2026: an earlier version of this article said public schools sit in Occupancy Category III with an ordinary Importance Factor. That was wrong. Under the National Structural Code of the Philippines (NSCP) 2015, a public school building is designed to a higher seismic standard than an ordinary commercial building.
NSCP Table 103-1 sorts buildings into occupancy categories, and Table 208-1 assigns each one a seismic Importance Factor. Category I — Essential Facilities names public school buildings explicitly, together with hospitals, fire and police stations, designated evacuation centers and emergency communication facilities. Table 208-1 gives Category I the highest factor: 1.50, so the design earthquake force is 50% higher than for a standard building at 1.00. Private schools are not named in Category I; their owners can and should ask for the same 1.50.
That's the design requirement for a new public school. The Mindanao quake showed what happens to the buildings that were never designed to it, or were never inspected afterward: a Matanao classroom building condemned since 2019 finally giving way, and more than 7,300 classrooms across the region left minor, majorly damaged, or destroyed.
Since NSCP doesn't mandate an elevated seismic standard for ordinary school buildings, the only way to know a campus building is actually safe is to have it independently reviewed — the code alone won't tell you.
Request a Structural Review →Three buildings at Matanao National High School — 50 classrooms across them — were condemned and cordoned off after the 2019 Mindanao earthquakes. Seven years later, none had been demolished or repaired. On June 8, 2026, the 10-classroom two-storey building among them finally collapsed; the other two four-storey buildings still need re-inspection. Everyone was safely outside at the flag ceremony when it happened — no injuries. But "condemned since 2019" describes a building that was known to be unsafe for seven years before it failed. That's not a design failure. It's a follow-through failure.
Many public school buildings in the Philippines predate the current NSCP 2015 seismic provisions — some were built under NSCP 1992, or earlier still, under no formal structural code at all. A building designed decades ago, even if it was compliant at the time, was not engineered against today's understanding of seismic hazard in a Cotabato Trench-adjacent region. The 1.50 Importance Factor only helps a building that was actually designed to it; a classroom built decades ago, or added without an engineer, may not come close.
Many campuses grew organically over decades: an extra floor added here, a former storage building converted into classrooms there, annexes built without a fresh structural analysis. Every one of these changes affects the load path of the original structure — regardless of what Importance Factor the building was originally designed to.
Unlike a private commercial building, many public school buildings have never had an independent third-party structural inspection between initial construction and the day disaster forces one. DepEd's post-quake response — deploying regional and Central Office engineers to clear schools one by one before reopening — is the right process. The problem is that, for most schools, it's the first time that process has ever happened.
Managing or overseeing a school, daycare, or evacuation-center building? A licensed AEDO engineer will personally review your documentation — free, no commitment.
Following a directive to mobilize engineers, DepEd sent structural engineers from its Central Office to support regional teams — particularly Regional Office XII, at the center of the damage zone — inspecting facilities school by school. Reopening was never on a blanket regional timeline; each individual building had to be inspected and formally cleared by DepEd engineers, local disaster coordinators, and structural experts before students returned to it.
That's the correct process. It's also the exception, not the rule — most schools nationwide have never gone through it outside of an actual disaster.
| Area | Question to Ask |
|---|---|
| Design Basis | Do the structural drawings exist and were they signed and sealed by a licensed engineer? |
| Code Edition | What year was the building constructed, and under which NSCP edition (or none) was it designed? |
| Condemnation History | Has any building on this campus ever been condemned or cordoned off after a past earthquake — and if so, was it actually demolished or repaired, or just left standing? |
| Modifications | Has the building been expanded, had a floor added, or been repurposed since original construction — and was a re-analysis done? |
| Inspection History | Has an independent structural engineer ever inspected this building outside of a disaster response? |
NSCP 2015 already asks for public schools to be designed as Essential Facilities, because of who is inside them and how they are used after a disaster. The gap is everything built before that, or built without an engineer: it has to be closed by assessment and retrofit of the older stock, condemned buildings that actually get demolished instead of just cordoned off, and independent inspection that doesn't wait for the next earthquake to happen.
A licensed AEDO engineer visits your campus, reviews the structural documentation against what's actually built, and delivers a written report on structural condition, load path, and code-edition risk within 5 business days. From ₱10,000, by floor area. We take 3 assessments per month to keep turnaround fast — message us to claim a slot.
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At AEDO Construction, we'll design an institutional project — school, clinic, evacuation-capable structure — to the standard its actual use warrants, even where NSCP's minimum doesn't require it.
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Planning a new classroom building, gymnasium, or evacuation-rated structure? Send us the floor area, storey count, and intended use, and we'll reply with a fixed structural design price within 1 business day. Auditing an existing campus? Start with the Assessment from ₱10,000 above.
NSCP 2015 designs public schools as Essential Facilities, but thousands of classrooms were built before that or without an engineer. The Mindanao quake showed what that gap, plus deferred demolitions and skipped inspections, actually produces. If you oversee a school, clinic, or evacuation-rated building, know where it stands before the next one hits.
DepEd's tally rose to 8,642 schools affected across six regions (43 divisions), disrupting classes for 4,090,246 learners. More than 6,200 schools closed the same day pending inspection. By June 10, DepEd recorded 1,462 classrooms destroyed and 5,840 with minor or major damage — over 7,300 classrooms total. At Matanao National High School in Davao del Sur, a building condemned since the 2019 earthquakes — one of three left standing for seven years without demolition or repair — finally collapsed. It happened during the flag ceremony with the building empty, so no one was hurt there.
Public school buildings, yes. NSCP 2015 Table 103-1 lists public school buildings under Occupancy Category I, Essential Facilities, together with hospitals and designated evacuation centers, and Table 208-1 gives Category I a seismic Importance Factor of 1.50, against 1.00 for an ordinary building. That means a public school designed under NSCP 2015 is designed for 50% more earthquake force. The gap is the existing stock: many classrooms were designed under older code editions or with no engineering at all, and a code requirement does nothing for a building that was never designed to it or never inspected. Private schools are not named in Category I, so a private school owner should ask the engineer to design to 1.50 anyway.
School by school, not on a blanket timeline. DepEd deployed regional and Central Office structural engineers to inspect each affected facility; classes only resume once engineers, local disaster coordinators, and structural experts formally clear that specific building.
Confirm signed and sealed structural drawings exist, identify the construction year and code edition, ask whether any building on campus was ever condemned after a past earthquake and whether it was actually demolished or repaired, check whether any expansion happened without re-analysis, and request an independent inspection if the building has never had one outside a disaster response.
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