Code of Massachusetts Regulations › 780 CMR - STATE BOARD OF BUILDING REGULATIONS AND STANDARDS › Chapter 16 - Structural Design › Section 1603 - CONSTRUCTION DOCUMENTS › Subsection 1603.1 - General

Current through Register 1525, July 5, 2024
Construction documents
shall show the size,
				  section and relative locations of structural members with floor levels, column
				  centers and offsets dimensioned. The design loads and other information
				  pertinent to the structural design required by Sections 1603.1.1 through
				  1603.1.9 shall be indicated on the
construction
				  documents
.
Exception:
Construction
				  documents
for buildings constructed in accordance with the
conventional light-frame construction
provisions of Section
				  2308 shall indicate the following structural design information:
1. Floor and roof live loads.
2. Ground snow load,
P
g.
3. Basic wind speed (3-second gust), miles
				per hour (mph) (m/s) and wind exposure.
4.
Seismic design category
and
site class
.
5.
				Flood design data, if located in
flood hazard areas
established in Section 1612.3.
6.
				Design load-bearing values of soils.
1603.1.1
Floor live load.
The uniformly distributed, concentrated and
				impact floor live load used in the design shall be indicated for floor areas.
				Use of live load reduction in accordance with Section 1607.9 shall be indicated
				for each type of live load used in the design.
1603.1.2
Roof live load.
The
				roof live load used in the design shall be indicated for roof areas (Section
				1607.11).
1603.1.3
Roof snow
				load.
The ground snow load,
P
g,
				shall be indicated. In areas where the ground snow load,
P
g, exceeds 10 pounds per square foot
				(psf) (0.479 kN/m2), the following additional
				information shall also be provided, regardless of whether snow loads govern the
				design of the roof:
1. Flat-roof snow load,
P
f.
2. Snow exposure factor,
C
e.
3. Snow load importance factor,
I
.
4. Thermal
				factor,
C
t.
1603.1.4
Wind design data.
The
				following information related to wind loads shall be shown, regardless of
				whether wind loads govern the design of the lateral-force-resisting system of
				the building:
1. Basic wind speed (3-second
				gust), miles per hour (m/s).
2.
				Wind importance factor,
I
, and
occupancy
				category
.
3. Wind
				exposure. Where more than one wind exposure is utilized, the wind exposure and
				applicable wind direction shall be indicated.
4. The applicable internal pressure
				coefficient.
5. Components and
				cladding. The design wind pressures in terms of psf
				(kN/m2) to be used for the design of exterior
				component and cladding materials not specifically designed by the
registered design professional
.
1603.1.5
Earthquake design data.
The following information related to seismic loads shall be shown, regardless
				of whether seismic loads govern the design of the lateral-force-resisting
				system of the building:
1. Seismic importance
				factor,
I
, and
occupancy category
.
2. Mapped spectral response accelerations,
S
S and
S
1.
3.
Site class
.
4. Spectral response coefficients,
S
DS and
S
D1.
5.
Seismic design
				category
.
6. Basic
				seismic-force-resisting system(s).
7. Design base shear.
8. Seismic response coefficient(s),
C
S.
9. Response modification factor(s),
R
.
10. Analysis
				procedure used.
1603.1.6
Geotechnical information.
The design load- bearing values of
				soils shall be shown on the
construction documents
.
1603.1.7
Flood design data.
For
				buildings located in whole or in part in
flood hazard areas
as
				established in Section 1612.3, the documentation pertaining to design, if
				required in Section 1612.5, shall be included and the following information,
				referenced to the datum on the community's Flood Insurance Rate Map (FIRM),
				shall be shown, regardless of whether flood loads govern the design of the
				building:
1. In
flood hazard
				areas
not subject to high-velocity wave action, the elevation of the
				proposed lowest floor, including the basement.
2. In
flood hazard areas
not
				subject to high-velocity wave action, the elevation to which any nonresidential
				building will be dry floodproofed.
3. In
flood hazard areas
subject to high-velocity wave action, the proposed elevation of the bottom of
				the lowest horizontal structural member of the lowest floor, including the
				basement.
1603.1.8
Special loads.
Special loads that are applicable to the design of the
				building, structure or portions thereof shall be indicated along with the
				specified section of this code that addresses the special loading
				condition.
1603.1.9
Systems
				and components requiring special inspections for seismic resistance.
Construction documents
or specifications shall be prepared for
				those systems and components requiring
special inspection
for
				seismic resistance as specified in Section 1707.1 by the
registered
				design professional
responsible for their design and shall be
				submitted for approval in accordance with Section 107.1. Reference to seismic
				standards in lieu of detailed drawings is acceptable.