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What the 2004 Tsunami Revealed About Mahabalipuram

On the morning of 26 December 2004 , something extraordinary happened at Mahabalipuram. As the tsunami approached India's east coast, the sea suddenly retreated. For a few minutes, the Bay of Bengal exposed a stretch of seabed that had been hidden for centuries. Local residents, fishermen and visitors reported seeing rows of dressed stones, walls and other structures before the water rushed back. The scene immediately revived one of India's oldest coastal legends: the Seven Pagodas . But did the tsunami really uncover a lost city? The answer is more interesting than the legend. A Story Older Than the Tsunami Long before archaeologists began studying Mahabalipuram, European sailors knew it by another name: The Seven Pagodas . For centuries, European sailors called Mahabalipuram the 'Seven Pagodas'. The name came from a local tradition that several magnificent temples once stood along the coast, while only one—the Shore Temple—remained visible abo...
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Part 7 — The Roof Plan | Sheet by Sheet

 

The roof plan is the most underestimated sheet in any residential set.

It looks simple from above — just a bunch of lines and arrows. 

But those lines represent ridges, valleys, hips, and overhangs that the framing crew has to translate into three dimensions. Get the roof plan wrong and the framing crew gets it wrong with you.

What it shows:

  • Ridge lines, hip lines, and valley lines
  • Roof slopes and pitch callouts
  • Overhangs and eave dimensions
  • Crickets and saddles at chimneys and vertical walls
  • Roofing material and underlayment notes
  • Skylight and roof penetration locations
  • Downspout and gutter locations

Key terms builders need to know:

Ridge — the highest horizontal line where two roof slopes meet at the top.

Valley — where two roof slopes meet going inward. Water runs here — critical to get right for drainage.

Hip — a sloping line where two roof planes meet at an outside corner.

Cricket — a small raised structure behind a chimney or parapet to divert water away. Often missing on poorly coordinated roof plans.

Where builders get burned:

Missing crickets. A chimney without a cricket behind it is a water infiltration problem waiting to happen. The roof plan should show it. The detail sheet should explain it. Both often don't.

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