Francis Vineyard
Registered User
If the interpretation were a problem think it might have been address at one time or another?
RB172-06/07
R602.6.1
Proposed Change as Submitted:
Proponent: Randall Shackelford, Simpson Strong-Tie Co
Revise as follows:
R602.6.1 Drilling and notching of top plate. When piping or ductwork is placed in or partly in an exterior wall or
interior load-bearing wall, necessitating cutting, drilling or notching of the top plate by more than 50 percent of its
width, a galvanized metal tie of not less than 0.054 inch thick (1.37 mm) (16 ga) and 1 1/2 inches (38 mm) wide
shall be fastened across and to the plate at each side of the opening with not less than eight 16d 10d (0.148”
diameter) nails having a minimum length of 1 1/2 inches (38 mm) at each side or equivalent. See Figure
R602.6.1.
DELETE Exception: When the entire side of the wall with the notch or cut is covered by wood structural panel
sheathing.
Reason: To revise code requirements.
0.148” by 1½” nails are common nails used to install metal ties (connectors). 16d nails tend to split the top plates, while 10d nails do not.
A recent interpretation from ICC Staff indicates that the 16d nails currently specified could be 16d box nails. 10d nails have an equivalent or
greater calculated capacity as 16d nails.
Table 11P of the 2005 NDS, standard reference number NDS–05 in the codes, provides allowable shear loads of a 16d box nail through a 16
gauge steel plate. They are:
• 88 pounds into Spruce-Pine-Fir
• 102 pounds into Douglas Fir-Larch
• 111 pounds into Southern Pine
Table 11P combined with footnote 3 provides allowable shear loads of a 10d common nail 1½ inches long (0.148” x 1.50”) through a 16 gauge
steel plate. They are:
• 97 pounds into Spruce-Pine-Fir
• 112 pounds into Douglas Fir-Larch
• 122 pounds into Southern Pine
Based on the allowable loads in the NDS, a 10d nail 1½ inches long exceeds the shear capacity of a 16d box nail in this application. The
Exception is stricken because the wood structural panel sheathing does not provide equivalent capacity as the strap. There is no way to tell
where the joint in the sheathing will be located. If it is located near the cut top plate, it will transfer very little load across the plate. Even if the
panel were located exactly centered over the cut in the plates, there will only be four 6d common nails on each side of the cut.
Cost Impact: The code change proposal will only increase the cost of construction if sheathing is being used to splice cuts in plates
Committee Action: Approved as Modified
Modify proposal as follows:
R602.6.1 Drilling and notching of top plate. When piping or ductwork is placed in or partly in an exterior wall or interior load-bearing wall,
necessitating cutting, drilling or notching of the top plate by more than 50 percent of its width, a galvanized metal tie of not less than 0.054 inch
thick (1.37 mm) (16 ga) and 1 1/2 inches (38 mm) wide shall be fastened across and to the plate at each side of the opening with not less than
eight 10d (0.148” diameter) nails having a minimum length of 1 1/2 inches (38 mm) at each side or equivalent. See Figure R602.6.1.
Exception: When the entire side of the wall with the notch or cut is covered by wood structural panel sheathing.
Committee Reason: This change eliminates the potential of splitting the top plate by reducing the nail size. The modification retains the
exception that will provide an alternative to the metal strap.
Assembly Action: None
Individual Consideration Agenda
This item is on the agenda for individual consideration because a public comment was submitted.
Public Comment:
Scott Dornfeld, City of Delano, MN, representing the Association of Minnesota Building Officials, requests
Approval as Modified by this Public Comment.
2007 ICC FINAL ACTION AGENDA 451
Further modify proposal as follows:
R602.6.1 Drilling and notching of top plates. When piping or ductwork is placed in or partly in an exterior wall or interior load-bearing wall,
necessitating cutting, drilling or notching of the top plate by more than 50 percent of its width, a galvanized metal tie of not less than 0.054 inch
thick (1.37 mm) (16 ga.) and 1 ½ inches (38mm) wide shall be fastened across and to the plate at each side of the opening with not less than
eight 10d (0.148” diameter) nails having a minimum length of 1 ½ inches (38mm) at each side or equivalent. The metal tie must extend a
minimum of 6 inches past the opening. See figure R602.6.1
Exception: When the entire side of the wall with the notch or cut is covered by wood structural panel sheathing.
Commenter=s Reason: This change will help maintain the top and tie plates as solid members, by extending the metal strap past each of
those plates that are cut or notch.
http://www.iccsafe.org/cs/codes/documents/2006-07cycle/faa/irc-be2.pdf
RB172-06/07
R602.6.1
Proposed Change as Submitted:
Proponent: Randall Shackelford, Simpson Strong-Tie Co
Revise as follows:
R602.6.1 Drilling and notching of top plate. When piping or ductwork is placed in or partly in an exterior wall or
interior load-bearing wall, necessitating cutting, drilling or notching of the top plate by more than 50 percent of its
width, a galvanized metal tie of not less than 0.054 inch thick (1.37 mm) (16 ga) and 1 1/2 inches (38 mm) wide
shall be fastened across and to the plate at each side of the opening with not less than eight 16d 10d (0.148”
diameter) nails having a minimum length of 1 1/2 inches (38 mm) at each side or equivalent. See Figure
R602.6.1.
DELETE Exception: When the entire side of the wall with the notch or cut is covered by wood structural panel
sheathing.
Reason: To revise code requirements.
0.148” by 1½” nails are common nails used to install metal ties (connectors). 16d nails tend to split the top plates, while 10d nails do not.
A recent interpretation from ICC Staff indicates that the 16d nails currently specified could be 16d box nails. 10d nails have an equivalent or
greater calculated capacity as 16d nails.
Table 11P of the 2005 NDS, standard reference number NDS–05 in the codes, provides allowable shear loads of a 16d box nail through a 16
gauge steel plate. They are:
• 88 pounds into Spruce-Pine-Fir
• 102 pounds into Douglas Fir-Larch
• 111 pounds into Southern Pine
Table 11P combined with footnote 3 provides allowable shear loads of a 10d common nail 1½ inches long (0.148” x 1.50”) through a 16 gauge
steel plate. They are:
• 97 pounds into Spruce-Pine-Fir
• 112 pounds into Douglas Fir-Larch
• 122 pounds into Southern Pine
Based on the allowable loads in the NDS, a 10d nail 1½ inches long exceeds the shear capacity of a 16d box nail in this application. The
Exception is stricken because the wood structural panel sheathing does not provide equivalent capacity as the strap. There is no way to tell
where the joint in the sheathing will be located. If it is located near the cut top plate, it will transfer very little load across the plate. Even if the
panel were located exactly centered over the cut in the plates, there will only be four 6d common nails on each side of the cut.
Cost Impact: The code change proposal will only increase the cost of construction if sheathing is being used to splice cuts in plates
Committee Action: Approved as Modified
Modify proposal as follows:
R602.6.1 Drilling and notching of top plate. When piping or ductwork is placed in or partly in an exterior wall or interior load-bearing wall,
necessitating cutting, drilling or notching of the top plate by more than 50 percent of its width, a galvanized metal tie of not less than 0.054 inch
thick (1.37 mm) (16 ga) and 1 1/2 inches (38 mm) wide shall be fastened across and to the plate at each side of the opening with not less than
eight 10d (0.148” diameter) nails having a minimum length of 1 1/2 inches (38 mm) at each side or equivalent. See Figure R602.6.1.
Exception: When the entire side of the wall with the notch or cut is covered by wood structural panel sheathing.
Committee Reason: This change eliminates the potential of splitting the top plate by reducing the nail size. The modification retains the
exception that will provide an alternative to the metal strap.
Assembly Action: None
Individual Consideration Agenda
This item is on the agenda for individual consideration because a public comment was submitted.
Public Comment:
Scott Dornfeld, City of Delano, MN, representing the Association of Minnesota Building Officials, requests
Approval as Modified by this Public Comment.
2007 ICC FINAL ACTION AGENDA 451
Further modify proposal as follows:
R602.6.1 Drilling and notching of top plates. When piping or ductwork is placed in or partly in an exterior wall or interior load-bearing wall,
necessitating cutting, drilling or notching of the top plate by more than 50 percent of its width, a galvanized metal tie of not less than 0.054 inch
thick (1.37 mm) (16 ga.) and 1 ½ inches (38mm) wide shall be fastened across and to the plate at each side of the opening with not less than
eight 10d (0.148” diameter) nails having a minimum length of 1 ½ inches (38mm) at each side or equivalent. The metal tie must extend a
minimum of 6 inches past the opening. See figure R602.6.1
Exception: When the entire side of the wall with the notch or cut is covered by wood structural panel sheathing.
Commenter=s Reason: This change will help maintain the top and tie plates as solid members, by extending the metal strap past each of
those plates that are cut or notch.
http://www.iccsafe.org/cs/codes/documents/2006-07cycle/faa/irc-be2.pdf
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