SECTION 05 2100

STEEL JOIST FRAMING

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This template must be edited for each project.  In doing so, specifier
must add job-specific requirements.  Brackets are used in the text to
indicate designer choices or locations where text must be supplied by
the designer.  Once the choice is made or text supplied, remove the
brackets.  The specifications must also be edited to delete
specification requirements for processes, items, or designs that are not
included in the project \-- and specifier's notes such as these.  To
seek a variance from requirements in the specifications that are
applicable, contact the Engineering Standards Manual Structural
Specifications
[POC](http://www.lanl.gov/orgs/eng/engstandards/POCs.shtml#struc).
Please contact POC with suggestions for improvement as well.\
\
When assembling a specification package, include applicable
specifications from all Divisions, especially Division 1, General
requirements.\
\
This specification section is for use with LANL ESM Chapter 5, Section
II; therefore it is applicable to ML-4 projects.  For ML-1, 2, and 3
applications, additional requirements and independent reviews should be
added if increased confidence in procurement or execution is desired;
see ESM Ch 1 Section Z10 Specifications and Quality sections.

This specification section covers the requirements for steel joists and
joist girders, as well as associated accessories, fittings and priming/
painting.

ESM Chapter 5, Sect. II, para. 7.0, references the International
Building Code (IBC), Chapter 22, Steel, for guidance on design
requirements for steel building structures, and components therein, most
of which are contained in this and other METALS sections of the
specifications\
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NOTE: The following information shall be shown on the project drawings:

1\. Joist series and size, joist girder depth, joist spacing, and kip
load on each panel point, span, and slope.

2\. Design loads, including uplift and lateral forces in addition to
gravity (dead and live) loads.

3\. Method of anchoring, framing at openings, and spacing and type of
bridging.

4\. Accessory details as applicable.

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PART 1 GENERAL

1.1 REFERENCES

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NOTE: Issue (date) of references included in project specifications need
not be more current than provided by the latest change (Notice) to this
spec section.

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> A. The publications listed below form a part of this specification to
> the extent referenced. The publications are referred to in the text by
> basic designation only.

AMERICAN WELDING SOCIETY (AWS)

> AWS D1.1 Structural Welding Code - Steel

STEEL STRUCTURES PAINTING COUNCIL (SSPC)

> SSPC PS 14.01 Steel Joist Shop Painting System

1.2 SUBMITTALS

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NOTE: Submittals must be limited to those necessary for adequate quality
control. The importance of an item in the project should be one of the
primary factors in determining if a submittal for the item should be
required.

Indicate submittal classification in the blank space following the name
of the item requiring the submittal by using \"REQD\" when the submittal
requires LANL approval. Submittal items not designated with a \"REQD\"
are considered as being for Subcontractor's Quality Control System or
for information only.

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> A. LANL approval is required for submittals with a \"REQD\"
> designation; submittals not having a \"REQD\" designation are for
> Subcontractor's Quality Control system, information only, or as
> otherwise designated.

Submit the following in accordance with the requirements of Section 01
3300.

1.  Shop drawings

    a\. Steel Joists \[ \], \[ \]

2.  Certificates

> a\. Accessories
>
> b\. Welder Qualification

3\. Test Reports

a\. Erection Inspection

b\. Welding Inspections

1.3 GENERAL REQUIREMENT

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NOTE: The structural steel design must meet the requirements of OSHA
Steel Erection Standard, 29 CFR Part 1926, Subpart R-Steel Erection,
effective date January 18, 2002.

Drawings will show size, spacing and method of anchoring. Size will be
indicated by reference to appropriate Steel Joist Institute (SJI)
designations. Mechanical and electrical layout drawings and
specifications for ceiling suspensions should contain notes indicating
that hanger loads between panel points in excess of 50 pounds shall have
the excess hanger loads suspended from panel points. When joists or
girders are to be designed to resist uplift and/or lateral forces, such
joists and girders and the forces they must resist will be indicated on
the drawings. Also, proper anchorages and bracings will be designed to
resist those forces, as required.

The standard joist tables cannot be used verbatim when the depth of the
joist is reduced near the ends to accommodate two-way top chord slopes
in excess of l/8 inch per foot. Before using standard designations for
these joists, the designer must verify the adequacy of the joist
members.

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> A. Steel joists \[and joist girders\] are designated on the drawings
> in accordance with the standard designations of the Steel Joist
> Institute (SJI). Joists of other standard designations or joists with
> properties other than those shown may be substituted for the joists
> designated provided the structural properties are equal to or greater
> than those of the joists shown and provided all other specified
> requirements are met.

1.4 DELIVERY AND STORAGE

> A. Handle, transport, and store joists \[and joist girders\] in a
> manner to prevent damage affecting their structural integrity. Store
> all items off the ground in a well drained location protected from the
> weather and easily accessible for inspection and handling.

5.  QUALITY ASSURANCE

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A.  Drawing Requirements

> 1\. Submit steel joist framing drawings. Show joist type and size,
> layout in plan, and erection details including methods of anchoring,
> framing at openings, \[type and spacing of bridging per SJI
> specification \[ \],\] \[requirements per LANL Welding Standards for
> field welding,\] and details of accessories as applicable.

B.  Certification Requirements

> 1\. Prior to welding, submit certification for welder qualification,
> welding operation, and tacker, stating the type of welding and
> positions qualified for, the code and procedure qualified under, date
> qualified, and the firm and individual certifying the qualification
> tests.

PART 2 PRODUCTS

2.1 JOISTS \[JOIST GIRDERS\] AND ACCESSORIES

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NOTE: When extra stiffness is desired, for comfort or special material
support, specify the allowable deflection for that span.

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> A. Steel joists \[and joist girders\] shall conform to the applicable
> SJI specification(s) for the joist series indicated.

2.2 ACCESSORIES AND FITTINGS

> A. Accessories and fittings, including supplementary framing,
> joist-leg extensions, end supports, and bridging, shall be in
> accordance with the applicable SJI specification(s) for the joist
> series indicated.

2.3 Bedding Mortar

> A. Damp-pack bedding mortar shall consist of 1 part cement and 2-1/2
> parts fine aggregate having water content such that a mass of mortar
> tightly squeezed in the hand will retain its shape but will crumble
> when disturbed.

2.4 PAINTING

> A. Shop Painting

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NOTE: Omit bracketed text when field painting is not required.

The requirements of the paragraph will be coordinated with the
requirements of Section 09 9100 Painting.

In crawl spaces and other high-humidity areas, where greater protection
than that provided by a primer paint is required and the joists or
girders will not be finish painted, the paragraph will be revised to
require that the joists or girders be shop painted with an asphalt-base
type paint.

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> 1\. Clean and prime joists \[, joist girders\] and accessories in
> accordance with SSPC PS 14.01, using only Type I, \"Red Oxide Paint.\"
> \[For joists \[and joist girders\] which will be finish painted under
> Section 09 9100 Painting, the primer paint shall be limited to a
> primer which is compatible with the specified finish paint.\]

PART 3 EXECUTION

3.1 INSTALLATION

> A. Handling and Erection
>
> 1\. Installation of joists \[and joist girders\] shall be in
> accordance with the applicable SJI specification(s) for the joist
> series indicated. Joists \[and joist girders\] shall be handled in a
> manner to avoid damage. Damaged joists \[and joist girders\] shall be
> removed from the site, except when field repair is approved and such
> repairs are satisfactorily made in accordance with the manufacturer\'s
> recommendations. Joists \[and joist girders\] shall be accurately set,
> and end anchorage shall be in accordance with the applicable SJI
> specification(s) for the joist series indicated. For spans over 40 ft
> through 60 ft, one row of bridging nearest midspan shall be bolted
> diagonal bridging; for spans over 60 ft bolted diagonal bridging shall
> be used instead of welded horizontal bridging. Joist bridging and
> anchoring shall be secured in place prior to the application of any
> construction loads. Any temporary loads shall be distributed so that
> the carrying capacity of any joist is not exceeded. Loads shall not be
> applied to bridging during construction or in the completed work.
>
> B. Welding
>
> 1\. Shall be in accordance with AWS D1.1 as required for the
> necessary/applicable welding.
>
> C. Bearing Plates
>
> 1\. Bearing plates shall be provided with full bearing after the
> supporting members have been plumbed and properly positioned, but
> prior to placing superimposed loads. The area under the plate shall be
> damp-packed solidly with bedding mortar, except where non-shrink grout
> is indicated on the drawings. Grout shall be as specified in Section
> 05 1000, Structural Metal Framing.

3.2 PAINTING

> A. Touch-Up Painting
>
> 1\. After erection of joists \[and joist girders\], touch-up
> connections, corroded \[and field-welded\] areas, and areas of abraded
> shop coat, with paint of the same type used for the shop coat.

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NOTE: Omit bracketed paragraph when field painting is not required.

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> \[B. Field Painting
>
> 1\. Paint joists \[and joist girders\] requiring a finish coat in
> conformance with the requirements of Section 09 9100 Painting.\]

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NOTE: Omit bracketed paragraph when field welding is not required.

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\[3.3 VISUAL INSPECTIONS

A. Erection Inspection shall be per AWS D1.1, Section 6.

> 1\. Perform erection inspection and field-welding inspections with
> AWS-certified welding inspectors.
>
> 2\. Welding inspectors shall visually inspect and mark welds.\]

END OF SECTION

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Do not delete the following reference information:

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FOR LANL USE ONLY

This project specification is based on LANL Master Specification 05 2100
Rev. 2, dated May 1, 2008.