diff --git a/public/samples/운곡교P1입력.xlsx b/public/samples/운곡교P1입력.xlsx
new file mode 100644
index 0000000..79adfa0
Binary files /dev/null and b/public/samples/운곡교P1입력.xlsx differ
diff --git a/src/main.ts b/src/main.ts
index bd2624d..68e61cf 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -492,7 +492,7 @@ function openImport(): void {
 }
 
 async function fetchSample(): Promise<Uint8Array> {
-  const res = await fetch(new URL('samples/P1.xlsx', document.baseURI));
+  const res = await fetch(new URL('samples/운곡교P1입력.xlsx', document.baseURI));
   if (!res.ok) throw new Error(`샘플 응답 ${res.status}`);
   return new Uint8Array(await res.arrayBuffer());
 }
@@ -535,7 +535,7 @@ $<HTMLInputElement>('file').addEventListener('change', async (ev) => {
 });
 $<HTMLButtonElement>('pick-sample').addEventListener('click', async () => {
   try {
-    loadBytes(await fetchSample(), '샘플 P1 (Pier ui_xxx.xlsx)');
+    loadBytes(await fetchSample(), '샘플 P1 (운곡교P1입력.xlsx)');
   } catch (err) {
     setStatus(`샘플을 불러오지 못했습니다: ${(err as Error).message}`);
   }
diff --git a/tests/helpers.ts b/tests/helpers.ts
index a13a1db..0f81f16 100644
--- a/tests/helpers.ts
+++ b/tests/helpers.ts
@@ -4,14 +4,21 @@ import * as XLSX from 'xlsx';
 import { parseWorkbook } from '../src/core/parseWorkbook';
 import type { PierInput } from '../src/core/types';
 
-const P1_PATH = fileURLToPath(new URL('../public/samples/P1.xlsx', import.meta.url));
+/** Spec workbook (RAG/Pier ui_xxx.xlsx, sheet intent.PR, all tables on one sheet). Used by single-sheet tests. */
+const SPEC_PATH = fileURLToPath(new URL('../public/samples/P1.xlsx', import.meta.url));
+/** User input (RAG/운곡교P1입력.xlsx, three sheets 교각 · IP · 받침). This is the P1 input used by the app and tests. */
+const INPUT_PATH = fileURLToPath(new URL('../public/samples/운곡교P1입력.xlsx', import.meta.url));
 
-export function loadWorkbook(path: string = P1_PATH): XLSX.WorkBook {
+export function loadWorkbook(path: string = SPEC_PATH): XLSX.WorkBook {
   return XLSX.read(readFileSync(path), { type: 'buffer' });
 }
 
+export function loadInputWorkbook(): XLSX.WorkBook {
+  return loadWorkbook(INPUT_PATH);
+}
+
 export function loadP1(): PierInput {
-  const { piers, issues } = parseWorkbook(loadWorkbook());
+  const { piers, issues } = parseWorkbook(loadInputWorkbook());
   if (issues.length) throw new Error(`P1 parse issues: ${JSON.stringify(issues)}`);
   const p1 = piers.find((p) => p.name === 'P1');
   if (!p1) throw new Error('P1 not found');
diff --git a/tests/parse.test.ts b/tests/parse.test.ts
index adb3e35..d8c5794 100644
--- a/tests/parse.test.ts
+++ b/tests/parse.test.ts
@@ -1,7 +1,7 @@
 import * as XLSX from 'xlsx';
 import { describe, expect, it } from 'vitest';
 import { parseWorkbook } from '../src/core/parseWorkbook';
-import { loadP1, loadWorkbook } from './helpers';
+import { loadInputWorkbook, loadP1, loadWorkbook } from './helpers';
 
 describe('parseWorkbook (P1 sheet intent.PR)', () => {
   it('finds exactly one pier P1 with the input values of the sheet', () => {
@@ -92,3 +92,13 @@ describe('three-sheet input (교각 · IP · 받침 on separate sheets, joined b
     ]);
   });
 });
+
+describe('user input file (RAG/운곡교P1입력.xlsx)', () => {
+  it('has the three sheets 교각 · IP · 받침 and parses to one pier, P1, with no issues', () => {
+    const wb = loadInputWorkbook();
+    expect(wb.SheetNames).toEqual(['교각', 'IP', '받침']);
+    const { piers, issues } = parseWorkbook(wb);
+    expect(issues).toEqual([]);
+    expect(piers.map((p) => [p.name, p.sheet])).toEqual([['P1', '교각']]);
+  });
+});