Mudsill Plate to Increase Foundation Bolt Strength and Reduce Splltting

MUDSILL PLATES INCREASE BOLT STRENGTH AND HELP PREVENT SPLITTING OF THE MUDSILL

 

House Bolt Strength and Mudsill Plates

Mudsill Plates were invented by Harlen Metal Products after the Northridge Earthquake to increase bolt strength and to reduce mudsill splitting caused by oversized holes, a phenomenon which is discussed below.
Thousands of homes had split mudsills for two reasons: the wood mudsill split because the bolt to mudsill connection was too weak to keep the wood mudsill from splitting, or the bolts were miss-installed with over sized holes.  Most of the time it was because of over sized holes.

OVERSIZED BOLT HOLES

Foundation bolt failure after the Northridge Earthquake from Over-Sized Holes

THIS MUDSILL SPLIT IN THE NORTHRIDGE  EARTH -QUAKE AND IS THE REASON MUDSILL PLATES WERE DEVELOPED.   

 

Split Mudsill

SOFT WOOD MUDSILL WILL FAIL BEFORE MUCH HARDER CONCRETE AND BOLT. ESPECIALLY IF IT HAS OVERSIZED BOLT HOLES

 

Improved Foundation Bolt Performance with Mudsill Plates

SIGNIFICANT INCREASE IN BOLT TO MUDSILL STRENGTH WHEN MUDSILL PLATES ARE USED.  THESE INCREASE THE STRENGTH OF THE BOLT TO MUDSILL CONNECTION.