ASCE_7-05_Appendix11.pdf

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Appendix A

QUALITY ASSUR ANCE PROVISIONS

1 A l QUALITY ASSURANCE

This section provides minimum requirements for quality assur-

ance for seismic force-resisting systems and other designated

seismic systems. These requirements are not directly related to

computation of earthquake loads, but they are deemed essential

for satisfactory performance in an earthquake where designing

with the loads determined in accordance with this standard, due

to the substantial cyclic inelastic strain capacity assumed to exist

by the load procedures in this standard. These requirements sup-

plement the testing and inspection requirements contained in the

reference documents given in Chapters 13 and 14.Thes e require-

ments form an integral part of Chapters 11 through 23.

l lA l l S c o p e As a minimu m, the quality assurance provisions

apply to the following:

I. The seismic force-resisting systems in structures assigned

to Seismic Design Categories C, D, E, or F.

2. Mechanical and electrical components as specified in Sec-

tion llA.1.3.10.

3. Designated seism ic systems in structures assigned to Seis-

mic Design C ategories D, E, or F.

EXCEPTIONS Structures that comply with the following criteria

are exempt from the preparation of a quality assu rance plan, but those

structures are not exempt from special inspection(s) or testing require-

ments:

i. The structure is constructed of light wood framing or light-gauge

cold-formed steel framing, SDs does not exceed 0.50, the height of

the structure does not exceed 35 ft above grade, and the structure

meets the requirem ents in items iii and iv in the following text.

or

ii. The structure is constructed using a reinforced m asonry structural

system or reinforced concrete structural system, SDs does not ex-

ceed 0.50, the height of the structure does not exceed 25 ft above

grade, and the structure meets the requirements in items iii and iv

in the followin g text.

iii. The structure is classified as Occupancy Ca tegory I o r 11.

iv. The structure does not have any of the following irregularities as

defined in Table 12.3-1 or 12.3-2:

(1) Torsional irregularity

(2) Extreme torsional irregularity

(3) Nonpa rallel systems irregularity

4)

Stiffness-soft story irreg ularity

(5) St i f fn es s~ xt re m e of t s tory i rregulari ty

6)

Discontinuity in lateral strength-weak story irregularity

7) Discontinuity in lateral strength-extreme weak story

ll A 1 2 Quality Assurance Plan A quality assurance plan

shall be submitted to the authority having jurisdiction.

llA 1 2 1 Details of Quality Assurance Plan The quality as-

surance plan shall specify the designated seismic systems or seis-

mic force-resisting system in accordance with Section 11A. I.1

that are subject to quality assurance. The registered design pro-

fessional in responsible charge of the design of a seismic force-

resisting system and a designated seismic system sh all be respon-

sible for the portion of the q uality assurance plan applicable to that

system. The special inspections and special tests needed to es-

tablish that the construction is in conformance w ith this standard

shall be included in the portion of the quality assurance plan ap-

plicable to the designated seismic system. Th e quality assurance

plan shall include

a. The seismic force-resisting systems and designated seismic

systems in accordance w ith this chapter that are subject to

quality assurance.

b. T he special inspections and testing to be provided as re-

quired by this standard and the reference documents in

Chapter 23.

c. The type and frequency of testing.

d. The type and frequency of special inspections.

e. The frequency and distribution of testing and special inspec-

tion reports.

f. The structural observations to be performed.

g. The frequency and distribution of structural observation re-

ports.

llA 1 2 2 Contractor Responsibility Each contractor respon-

sible for the construction of a seismic force-resisting system,

designated seismic system, or component listed in the quality

assurance plan shall submit a w ritten contractor s statement of

responsibility to the regulatory authority having jurisdiction and

to the owner prior to the commencement of work on the system

or component. The contractor s statement of responsibility shall

contain the following:

I. Acknow ledgment of awareness of the special requirements

contained in the quality assurance p lan.

2. Acknowledgment that control will be exercised to obtain

conformance with the design documents approved by the

authority h aving jurisdiction.

3. Procedures for exercising control w ithin the co ntractor s

organization, the method and frequency of reporting, and

the distribution of the reports.

4.

Identification and qualifications of the person(s) exercising

such control and their position(s) in the organization.

llA 1 3 Special Inspection and Testing The building owner

shall employ a special inspector(s) to observe the construction

of all designated seismic systems in accordance w ith the quality

assurance plan for the following construction work. T he authority

having jurisdiction shall have the option to ap prove the quality

assurance personnel of a fabricator as a special inspector. The

person in charge of the special inspector(s) and the testing services

shall be a registered d esign professional.

llA 1 3 1 Foundations Periodic special inspection is required

during the

a. Driving of piles.

b. Con struction of drilled piles, piers, and caisson s.

Minimum Design Loads for Buildings and Other Structures


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c. Placement of reinforcing steel in piers, piles, caissons, and

shallow foundations.

d. Placement of concrete in piers, piles, caissons, and shallow

foundations.

l lA.1 .3 .2 Reinforcing Steel.

l lA.1 .3 .2 .1

Periodic Special Inspection. Periodic special in-

spection during and upon completion of the placement of reinforc-

ing steel in intermediate and special moment frames of concrete

and con crete shear walls.

11A.1.3.2.2

Continuous Special Inspection. Continuous

special inspection is required during the welding of reinforcing

steel resisting flexural and axial forces in intermediate and spe-

cial moment frames of concrete, in boundary mem bers of concrete

shear walls, and welding of shear reinforcement.

l lA.1 .3 .3

Structural Concrete. Periodic special inspection is

required during and on co mpletion of the placement of concrete in

intermediate and special momen t frames, and in boundary mem-

bers of concrete shear walls.

l lA.1 .3 .4

Prestressed Concrete. Periodic special inspection

during the placement and after the completion of placement of

prestressing steel and continuous special inspection is required

during all stressing and grouting operations and during the place-

ment of concrete.

l lA.1 .3 .5

Structural Masonry.

l lA.1 .3 .5 .1

Periodic Special Inspection. Periodic special in-

spection is required during the preparation of mortar, the laying

of masonry units, and placement of reinforcement; and prior to

placement of grout.

11A.1.3.5.2

Continuous Special Inspection. Continuous

special inspection is required during welding of reinforcement,

grouting, consolidation, and reconsolidation, and placement of

bent-bar anchors as required by Section 14.4.

l lA.1 .3 .6

Structural Steel.

l lA.1 .3 .6 .1 Continuous Special Inspection. Continuous

special inspection is required fo r all structural welding.

EXCEPTION: Periodic special inspection for single-pass fillet or re-

sistance welds and welds loaded to less than 50 perce nt of their design

strength shall be the m inimum requirement, provided the qualifications of

the welder a nd the welding electrodes are insp ected at the beginning of

the work and all welds are inspected for compliance with the approved

construction docum ents at the completion of welding.

11A.1.3.6.2 Periodic Special Inspection. Periodic special in-

spection is required in accordance with AISC LRFD or AISC A SD

for installation and tightening of fully tensioned high-strength

bolts in slip-critical connections and in connections subject to

direct tension. Bolts in connections identified as not being slip-

critical or sub ject to direct tension need not be inspected for bolt

tension other than to ensure that the plies of the connected ele-

ments have been brought into snug contact.

l lA.1 .3 .7 Structural Wood.

l lA.1 .3 .7 .1 Continuous Special Inspection. Continuous

special inspection is required during all field gluing operations

of elements of the seismic force-resisting system .

11A.1.3.7.2 Periodic Special Inspection for Components.

Periodic sp ecial inspection is required for nailing, bolting, anchor-

ing, and other fastening of compon ents within the seismic force-

resisting system including drag struts, braces, and hold downs.

11A.1.3.7.3 Periodic Special Inspection for Wood Sheath

ing. Periodic special inspections for nailing and other fastening

of wood sheathing used for wood shear walls, shear panels, and

diaphragms w here the required fastener spacing is 4 in. or less,

and that are includ ed in the seismic force-resisting system .

l lA.1 .3 .8

Cold Formed Steel Framing

l lA.1 .3 .8 .1 Periodic Special Inspection for Welding. Peri-

odic special inspection is required during all welding o perations

of eleme nts of the seismic force-resisting system .

11A.1.3.8.2 Periodic Special Inspection for Components.

Periodic special inspection is required for screw attachment, bolt-

ing, anchoring, and other fastening of components within the

seismic force-resisting system , includin g struts, braces, and hold-

downs.

l lA.1 .3 .9

Architectural Components. Special inspection for

architectural components shall be as follows:

I. Periodic special inspection during the erection and fastening

of exterior cladding, interior and exterior nonbearing w alls,

and interior and exterior veneer in structures assigned to

Seism ic Design Categories D, E or F.

EXCEPTIONS:

a. Architectural components less than 30 ft 9 m) above grade or wa ll-

ing surface.

b. Cladding and veneer weighing 5 lb/ft2 239 N/m 2) or less.

c. Interior nonbearing walls weighing 15 lb/ft2 718 N/m 2) or less.

2. Periodic special inspection during the anchorage of access

floors and the installation of suspended ceiling grids, and

storage racks

8

ft 2.5 m) or greater in height in structures

assigned to Seismic Design Categories D, E or F.

3.

Periodic special inspection during erection of glass

30

ft

9

m) or mo re above an adjacent grade or walking surface in

glazed curtain walls, glazed storefronts, and interior glazed

partitions in structures assigned to Seismic Design Cate-

gories D, E or

F.

l lA.1 .3 .10 Mechanical and Electrical Components. Special

inspection for mechanical and electrical components sh all be as

follows:

I. Periodic special inspection during the anchorage of electri-

cal equipment for emergency or standby power systems in

structures assigned to Seismic Design Categories C, D, E

or F.

2. Periodic special inspection during the installation of an-

chorage of all other electrical equipment in S eismic Design

Categories E or F.

3.

Periodic special inspection during the installation for

flammable, combustible, or highly toxic piping sy stems and

their associated mechanical units in Seismic Design C ate-

gories C, D, E o r F.

4. Periodic special inspection during the installation of HVAC

ductwork that w ill contain hazardous m aterials in Seism ic

Design Categories C, D, E or F.

5. Periodic special inspection during the installation of vibra-

tion isolation systems where the construction documents

indicate a maximum clearance air gap) between the equip-

ment support frame and restraint less than or equal to 114

in.

240 SCE

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llA.1.3.11 Seismic Isolation System.

Periodic special inspec-

tion is required during the fabrication and installation of isolator

units and energy d issipation devices if used as part of the seism ic

isolation system.

1 1A 2 TESTING

The special inspector s) shall be responsible for verifying that the

special test requirements are performed by an approved testing

agency for the types of work in designated seismic sy stems listed

in the following text.

ll A .2 .1 Reinforcing and Prestressing Steel.

Special testing of

reinforcing and prestressing steel shall be as follows:

llA .2.1 .1 Certified Mill Test Reports.

Exam ine certified mill

test reports for each shipm ent of reinforcing steel used to resist

flexural and axial forces in reinforced concrete intermediate and

special moment frames and boundary m embers of reinforced con-

crete shear walls or reinforced masonry shear walls and determine

conformance w ith construction documents.

llA .2.1 .2 ASTM A615 Reinforcing Steel. Where ASTM A615

reinforcing steel is used to resist earthquake-induced flexural and

axial forces in special mom ent frames and in wall boundary el-

ements of shear walls in structures assigned to Seismic Design

Categories D, E, or F, verify that the requirements of Section

21.2.5.1 of ACI 318 have been satisfied.

llA .2.1 .3 Welding of ASTM A615 Reinforcing Steel. Where

AS TM A615 reinforcing steel is to be welded, verify that chemical

tests have been p erformed to determine w eld ability in accordance

with Section 3.5.2 of ACI 318.

llA.2.2 Structural Concrete. Samples of structural concrete

shall be obtained at the project site and tested in accordance w ith

requirements of Section 5.6 of ACI 3 18.

ll A. 2. 3 Structural Masonry.

Quality assurance testing of

structural masonry shall be in accordance with the requirements

of ACI 530lASCE 51TMS 402 or ACI 530.l lAS CE 6lTMS 6 02.

llA.2.4 Structural Steel. The testing needed to establish that

the construction is in conformance with this standard shall be

included in a quality assurance plan. The minimum testing con-

tained in the quality assurance plan shall be as required in AISC

Seism ic and the following requirements:

llA.2.5 Base Metal Testing.

Base metal thicker than 1.5 in.

38 mm), where subject to through-thickness weld shrinkage

strains, shall be ultrasonically tested for discontinuities behind

and adjacent to such welds after joint completion. Any m aterial

discontinuities shall be accepted or rejected on the basis of AS TM

A435, o r ASTM A898, and criteria as established by the registered

design professional s) in responsible charge and the construction

documents.

ll A .2 .6 Seismic Isolated Structures.

For required system

tests, see Section 17.8.

llA.2.7 Mechanical and Electrical Equipment.

The special

inspector shall examine mechanical and electrical equipment that

are a designated seismic system and shall determine w hether its

anchorages and label conform with the certificate of com pliance.

11A 3 STRUCTU RAL OBSERVATIONS

Structural observations shall be provided for those structures in-

cluded in Seismic Design Categories D, E, or F w here one or more

of the following cond itions exist:

I. The structure is included in Occupan cy Category I11 or IV.

2. The height of the structure is greater than 75 ft above the

base.

3. The structure is assigned to Seismic Design Category E and

Occupancy Category I or I1 and is greater than two stories

in height.

Structural observations shall be performed by a registered de-

sign professional. Observed deficiencies shall be reported in w rit-

ing to the o wner an d the authority having jurisdiction.

11A 4 REPORTING AND COMPLIANCE

PROCEDURES

Each special inspector shall furnish to the authority having ju-

risdiction, registered design professional in responsible charge,

the owner, the persons preparing the quality assurance plan, and

the contractor copies of regular weekly progress reports of his or

her observations, noting therein any uncorrected deficiencies and

correction s of previously reported deficien cies. All deficiencies

shall be brought to the imm ediate attention of the contractor for

correction. At completion of construction, each special inspec-

tor shall subm it a final report to the authority having jurisdiction

certifying that all inspected w ork was completed substantially in

accordance with approved construction documents. Work not in

compliance shall be described in the final report. At com pletion

of construction, the building contractor shall submit a final report

to the authority having jurisdiction certifying that all construc-

tion work incorporated into the seismic force-resisting system

and other designated seismic systems was constructed substan-

tially in accordance with the approved construction documents

and applicable workmans hip requirements. Work not in compli-

ance shall be described in the final report. The contractor shall

correct all deficiencies as required.



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Appendix B

EXISTING BUILDING PROVISIONS

l l B l S CO PE

The provisions of this appendix shall apply to the design and

construction of alterations and additions and to existing structures

with a change in use.

11 B 2 STRUCTURA LLY INDEPENDENT ADDITIONS

An addition that is structurally independent from an existing struc-

ture shall be designed and constructed in accordance with the

seismic requirements for new structures.

11 B 3 STRUCTURA LLY DEPENDENT ADDITIONS

Wh ere an addition is not structurally independent from an ex isting

structure, the addition and alterations to the existing structure

shall be designed and constructed such that the entire structure

conforms to the seismic force-resistance requirements for new

structures.

EXCEPTIONS The entire structure shall not be required to comply w ith

the seismic force-resistance requir eme nts for new structures where all of

the following conditions are met:

1. The addition complies with the requirements for new structures.

2. The addition does not increase the seismic forces in any structural

element of the existing structure by mo re than 10 percent unless

the capacity of the element subject to the increased forces is still in

compliance with this standard.

3. The addition does not decrease the s eismic resistance of any struc-

tural element of the existing structure unless the reduced resistance

is equal to o r greater than that required for new structures.

11 B 4 ALTERATIONS

Alterations are permitted to be made to any structure without

requiring the existing structure to comply with this standard pro-

vided the alterations comply with the requirements for a new

structure. Alterations that increase the seismic force in any exist-

ing structural element by m ore than 10 percent or decrease the

design strength of any existing structural elemen t to resist seis-

mic forces by m ore than 10 percent shall not be permitted unless

the entire seismic force-resisting system is determined to comply

with this standard for a new structure.

EXCEPTIONS

Alterations to existing structural elements or additions

of new structural elements that are not required by this standard and are

initiated forthe purpose of increasing he strength or stiffness of the seismic

force-resisting system of an existing structure shall not be required to be

designed for forces in accordance with this standard provided that an

engineering analysis is submitted indicating the following:

1. Th e desig n strengths of existing structural eleme nts required to resist

seismic forces are not reduced.

2. The seismic force to required existing structural elements is not

increased beyond their design strength.

3. New structural elements are detailed and connected to the existing

structural elemen ts as required by this standard.

4

New or relocated nonstructural elements ar e detailed and connected

to existing or new structural elements as req uired by this standard.

5

The alteration does not create a structural irregularity or make an

existing irregularity more severe.

11 B 5 CHANGE OF USE

Where a change of use results in a structure being reclassified

to a higher occupancy category as defined in Table 1-1 of this

standard, the structure shall conform to the seismic requirements

for new construction.

EXCEPTIONS

1. Where a change of use results in a structure being reclassified from

Occupancy Category

I

o r

I1

to Occupancy Category

111

and the struc-

t u re is lo ca ted i n a sei sm i c m ap a rea wh e re S D ~0.33, compliance

with the seismic requirements of this standard is no t required.

2.

Specific s eismic detailing requireme nts of this standard for a new

structure need not be met where it can be shown that the level of

performanc e and seismic safety is equivalent to that of a new struc-

ture. Such analysis shall consider the regularity, overstrength, re-

dundancy, and ductility of the structure within the context of the

existing and retrofit if any) detailing provided.



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Appendix

C

SERVICE BILITY CONSIDER TIONS

C. SERVICEABILITY CONSIDER ATIONS

This Appendix is not a mandatory part of the standard, but pro-

vides guidance f or design for serviceability in order to maintain

the function of a building and the com fort of its occupants during

normal usage. Serviceability limits e.g., maximum static defor-

mations, accelerations, etc.) shall be chosen with due regard to

the intended function of the structure.

Serviceability shall be checked using appropriate loads for the

limit state being considered.

C. l DEFLECTION VIBRATION AND DRIFT

C l l Vertical Deflections Deformations of floor and roof

members and systems due to service loads shall not impair the

serviceability of the structure.

C 1 2 Drift of W alls and Frames Lateral deflection or drift of

structures and deformation of horizontal diaphragms and bracing

systems due to w ind effects shall not impair the serviceability of

the structure.

C 1 3 Vibrations Floor systems supporting large open areas

free of partitions or other sources of damping, where vibration

due to pedestrian traffic might be ob jectionable, shall be designed

with due regard for such vibration.

Mechanical equipment that can produce objectionable vibra-

tions in any portion of an inhabited structure shall be isolated to

minimize the transmission of such vibrations to the structure.

Building structural systems shall be designed so that wind-

induced vibrations do not cause occupant discomfort or damage

to the building, its appurtenances o r contents.

C.2 DESIGN FOR LONG-TERM DEFLECT ION

Where required for acceptable building performance, members

and systems shall be designed to accommodate long-term irre-

versible deflections under sustained load.

C.3 CAMBER

Special camber requirements that are necessary to bring a loaded

member in to proper relations with the work of other trades shall

be set forth in the design docum ents.

Beams detailed without specified camber shall be positioned

during erection so that any minor camber is upward. If camber

involves the erection of any m ember under preload, this shall be

noted in the design documents.

C.4 EXPANSION AND CONTRACTION

Dimensional chan ges in a structure and its elements due to vari-

ations in temp erature, relative humidity, or other effects shall not

impair the serviceability of the structure.

Provision shall be made either to control crack widths or to

limit cracking by providing relief joints.

C.5 DURABILITY

Buildings and other structures shall be designed to tolerate long-

term environmental effects o r shall be protected against such ef-

fects.



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