International Building Code Section 1715


International Building Code 1715.1

STRUCTURAL TESTS AND SPECIAL INSPECTIONS

Test standards for joist hangers and connectors.

Test standards for joist hangers. The vertical
load-bearing capacity, torsional moment capacity and
deflection characteristics of joist hangers shall be determined
in accordance withASTMD1761 using lumber having
a specific gravity of 0.49 or greater, but not greater than
0.55, as determined in accordance with AF&PA NDS for
the joist and headers.
Exception: The joist length shall not be required to
exceed 24 inches (610 mm).

Vertical load capacity for joist hangers. The vertical
load capacity for the joist hanger shall be determined
by testing a minimum of three joist hanger assemblies as
specified in ASTM D 1761. If the ultimate vertical load for
any one of the tests varies more than 20 percent from the
average ultimate vertical load, at least three additional tests
shall be conducted. The allowable vertical load of the joist
hanger shall be the lowest value determined from the following:
1. The lowest ultimate vertical load for a single hanger
from any test divided by three (where three tests are
conducted and each ultimate vertical load does not
vary more than 20 percent from the average ultimate
vertical load).
2. The average ultimate vertical load for a single hanger
from all tests divided by three (where six or more tests
are conducted).
3. The average from all tests of the vertical loads that
produce a vertical movement of the joist with respect
to the header of 0.125 inch (3.2 mm).
4. The sum of the allowable design loads for nails or
other fasteners utilized to secure the joist hanger to the
wood members and allowable bearing loads that contribute
to the capacity of the hanger.
5. The allowable design load for the wood members
forming the connection.

Torsional moment capacity for joist hangers.
The torsional moment capacity for the joist hanger shall be
determined by testing at least three joist hanger assemblies
as specified in ASTM D 1761. The allowable torsional
moment of the joist hanger shall be the average torsional
moment at which the lateral movement of the top or bottom
of the joist with respect to the original position of the joist is
0.125 inch (3.2 mm).

Design value modifications for joist hangers.
Allowable design values for joist hangers that are determined
by Item 4 or 5 in Section 1715.1.2 shall be permitted
to be modified by the appropriate duration of loading factors
as specified in AF&PA NDS but shall not exceed the direct
loads as determined by Item 1, 2 or 3 in Section 1715.1.2.
Allowable design values determined by Item 1, 2 or 3 in
Section 1715.1.2 shall not be modified by duration of loading
factors.

International Building Code 1715.1.1

Test standards for joist hangers. The vertical
load-bearing capacity, torsional moment capacity and
deflection characteristics of joist hangers shall be determined
in accordance withASTMD1761 using lumber having
a specific gravity of 0.49 or greater, but not greater than
0.55, as determined in accordance with AF&PA NDS for
the joist and headers.
Exception: The joist length shall not be required to
exceed 24 inches (610 mm).

International Building Code 1715.1.2

Vertical load capacity for joist hangers. The vertical
load capacity for the joist hanger shall be determined
by testing a minimum of three joist hanger assemblies as
specified in ASTM D 1761. If the ultimate vertical load for
any one of the tests varies more than 20 percent from the
average ultimate vertical load, at least three additional tests
shall be conducted. The allowable vertical load of the joist
hanger shall be the lowest value determined from the following:
1. The lowest ultimate vertical load for a single hanger
from any test divided by three (where three tests are
conducted and each ultimate vertical load does not
vary more than 20 percent from the average ultimate
vertical load).
2. The average ultimate vertical load for a single hanger
from all tests divided by three (where six or more tests
are conducted).
3. The average from all tests of the vertical loads that
produce a vertical movement of the joist with respect
to the header of 0.125 inch (3.2 mm).
4. The sum of the allowable design loads for nails or
other fasteners utilized to secure the joist hanger to the
wood members and allowable bearing loads that contribute
to the capacity of the hanger.
5. The allowable design load for the wood members
forming the connection.

International Building Code 1715.1.3

Torsional moment capacity for joist hangers.
The torsional moment capacity for the joist hanger shall be
determined by testing at least three joist hanger assemblies
as specified in ASTM D 1761. The allowable torsional
moment of the joist hanger shall be the average torsional
moment at which the lateral movement of the top or bottom
of the joist with respect to the original position of the joist is
0.125 inch (3.2 mm).

International Building Code 1715.1.4

Design value modifications for joist hangers.
Allowable design values for joist hangers that are determined
by Item 4 or 5 in Section 1715.1.2 shall be permitted
to be modified by the appropriate duration of loading factors
as specified in AF&PA NDS but shall not exceed the direct
loads as determined by Item 1, 2 or 3 in Section 1715.1.2.
Allowable design values determined by Item 1, 2 or 3 in
Section 1715.1.2 shall not be modified by duration of loading
factors.

International Building Code 1715.2

Concrete and clay roof tiles.

Overturning resistance. Concrete and clay roof
tiles shall be tested to determine their resistance to overturning
due to wind in accordance with SBCCI SSTD 11 and
Chapter 15.

Wind tunnel testing. When roof tiles do not satisfy
the limitations in Chapter 16 for rigid tile, a wind tunnel
test shall be used to determine the wind characteristics of the
concrete or clay tile roof covering in accordance with
SBCCI SSTD 11 and Chapter 15.
342 2006 INTERNATIONAL BUILDING CODE
STRUCTURAL TESTS AND SPECIAL INSPECTIONS

International Building Code 1715.2.1

Overturning resistance. Concrete and clay roof
tiles shall be tested to determine their resistance to overturning
due to wind in accordance with SBCCI SSTD 11 and
Chapter 15.

International Building Code 1715.2.2

Wind tunnel testing. When roof tiles do not satisfy
the limitations in Chapter 16 for rigid tile, a wind tunnel
test shall be used to determine the wind characteristics of the
concrete or clay tile roof covering in accordance with
SBCCI SSTD 11 and Chapter 15.