Code of Massachusetts Regulations › 780 CMR - STATE BOARD OF BUILDING REGULATIONS AND STANDARDS › Chapter 17 - Structural Tests and Special Inspections › Section 1705 - STATEMENT OF SPECIAL INSPECTIONS › Subsection 1705.3 - Seismic resistance

Current through Register 1525, July 5, 2024
The statement of special inspections shall include seismic
				  requirements for cases covered in Sections 1705.3.1 through 1705.3.5.
Exception:
Seismic requirements are permitted
				  to be excluded from the statement of special inspections for structures
				  designed and constructed in accordance with the following:
1. The structure consists of light-frame
				construction; the design spectral response acceleration at short periods,
S
DS, as determined in Section 1613.5.4,
				does not exceed 0.5g; and the height of the structure does not exceed 35 feet
				(10 668 mm) above
grade plane
; or
2. The structure is constructed using a
				reinforced masonry structural system or reinforced concrete structural system;
				the design spectral response acceleration at short periods,
S
DS, as determined in Section 1613.5.4,
				does not exceed 0.5g, and the height of the structure does not exceed 25 feet
				(7620 mm) above
grade plane
; or
3. Detached one- or two-family dwellings not
				exceeding two
stories above
grade plane
,
				provided the structure does not have any of the following plan or vertical
				irregularities in accordance with Section 12.3.2 of ASCE 7:
3.1. Torsional irregularity.
3.2. Nonparallel systems.
3.3. Stiffness irregularity-extreme soft
				story and soft story.
3.4.
				Discontinuity in capacity-weak story.
1705.3.1
Seismic-force-resisting
				systems.
The seismic- force-resisting systems in structures assigned to
Seismic Design Category
C, D, E or F, in accordance with
				Section 1613.
Exception:
Requirements for the
				  seismic-force-resisting system are permitted to be excluded from the statement
				  of special inspections for steel systems in structures assigned to
Seismic Design Category
C that are not specifically detailed
				  for seismic resistance, with a response modification coefficient,
R
, of 3 or less, excluding cantilever column systems.
1705.3.2
Designated seismic
				systems.
Designated seismic systems in structures assigned to
Seismic Design Category
D, E or F.
1705.3.3
Seismic Design Category
				C.
The following additional systems and components in structures
				assigned to
Seismic Design Category
C:
1. Heating, ventilating and air-conditioning
				(HVAC) ductwork containing hazardous materials and anchorage of such
				ductwork.
2. Piping systems and
				mechanical units containing flammable, combustible or highly
toxic
materials.
3. Anchorage of electrical equipment used for
				emergency or standby power systems.
1705.3.4
Seismic Design Category
				D.
The following additional systems and components in structures
				assigned to
Seismic Design Category
D:
1. Systems required for
Seismic
				Design Category
C.
2.
				Exterior wall panels and their anchorage.
3. Suspended ceiling systems and their
				anchorage.
4. Access floors and
				their anchorage.
5. Steel storage
				racks and their anchorage, where the importance factor is equal to 1.5 in
				accordance with Section 15.5.3 of ASCE 7.
1705.3.5
Seismic Design Category E or
				F.
The following additional systems and components in structures
				assigned to
Seismic Design Category
E or F:
1. Systems required for
Seismic
				Design Categories
C and D.
2. Electrical equipment.
1705.3.6
Seismic requirements in the
				statement of special inspections.
When Sections 1705.3 through 1705.3.5
				specify that seismic requirements be included, the statement of special
				inspections shall identify the following:
1.
				The designated seismic systems and seismic- force-resisting systems that are
				subject to
special inspections
in accordance with Sections
				1705.3 through 1705.3.5.
2. The
				additional
special inspections
and testing to be provided as
				required by Sections 1707 and 1708 and other applicable sections of this code,
				including the applicable standards referenced by this code.