Astm C920 Class 25 Vs Class 50 -

$$ \textRequired Class \ge \frac\textTotal Anticipated Movement\textInstalled Joint Width \times 100 $$

To decide between the two, you must calculate the of your joint. astm c920 class 25 vs class 50

For more technical data on specific products, check the ASTM C920 standards or review the Pecora Sealant Summary . astm c920 class 25 vs class 50

An engineer calculates that a specific building joint will expand and contract by a total of 0.4 inches due to thermal changes. astm c920 class 25 vs class 50

“ASTM C920, Class 50. That’s what the engineer wrote.”