Purlin 01
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Center Purlin

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Our Center Purlin upgrade kit dramatically increases your Caterpillar Tunnel’s ability to withstand wind and snow loads, turning it into a true four season structure, while also increasing overall strength and rigidity. Based on customer experience, we know of at least one Caterpillar Tunnel, fitted with a center purlin, that withstood up to 38” of snow like a champ!

The Center Purlin upgrade kit also includes enough “U clamps” to easily attach the solid purlin to your Caterpillar Tunnel bows.