Steel Erection Standard Orientation PART2

8/2/2019 Steel Erection Standard Orientation PART2

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1926.7521926.752--754754

Subpart R Steel ErectionSubpart R Steel Erection


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.752 Site Layout, Erection Plan,.752 Site Layout, Erection Plan,

Construction SequenceConstruction Sequence


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Approval to begin steel erection - Beforeauthorizing the startof steel erection, thecontrolling contractormust ensure that

the steel erector is provided with thefollowing writtennotifications:

Written AuthorizationWritten Authorization


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Concrete in footings, piers or walls mustreach 75% of the intended minimum

compressive strength or sufficient strength tosupport loads (as approved by the Engineerof Record)

Repairs to anchor bolts must be inaccordance with .755(b)

Written NotificationsWritten Notifications


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All concrete and masonry testing

must be done in accordance withAmerican Society of Testing andManufacturing (ASTM) standards

Testing RequirementsTesting Requirements


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Commencement of Steel erection -

Steel erection contractorshall not erectsteel unlesswritten notice that the

concrete in the footings, piers and wallsor mortar in the masonry piers hasattained 75% of minimum compressive

strength

Written NotificationsWritten Notifications


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The controlling contractor

shall provide and maintain:Adequate access roads

Firm, properly graded,

drained area readilyaccessible with adequatespace for safe storage ofmaterials and equipment

Site LayoutSite Layout


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Routes preplanned to

ensure no employeerequired to workunder a suspended

load except: Connectors

Employees

responsible forhooking/unhookingthe load


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Erection PlanErection Plan

Site-Specific Erection Plan - Allowed as an

alternative to some specific provisions: 1926.753(c)(5) deactivating safety latches

1926.757(a)(4) setting some steel joists

1926.757(e)(4)(i) placing bundled decking

shall be developed by a qualified person and be

available Due to changing scope from project to project, a

plan may be good practice for ALL operations


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.753 Hoisting and Rigging.753 Hoisting and Rigging


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It happensIt happens


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InspectionsInspections

Pre-shift visual

inspection ofcranes by acompetent

person


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Main Inspection PointsMain Inspection Points

Control mechanisms

Drive mechanism

Safety devices

Air & hydraulic lines

Hooks & latches

Wire rope reeving

Electrical equipment

Hydraulic fluid levels

Tires Ground conditions

Level of equipment Level of equipment

after each move


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The operator shallbe responsible forthose operationsunder the operator'sdirect control.

Whenever there is

any doubt as tosafety, the operatorshall have the

authority to stop andrefuse to handleloads until safetyhas been assured


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A qualified rigger shall inspect the riggingprior to each shift


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Crane Supported PlatformsCrane Supported Platforms

Cranes may hoistemployees with a

personnel platformmeeting therequirements of .550(g)

For steel erectionactivities, the

determination of noother feasible means

is no longer required

Still recommended,however


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No Riding the Ball!!!No Riding the Ball!!!


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Hoisting OperationsHoisting Operations

May deactivate

safety latches onhooks for some

purlin and joisthoisting if doneunder an erection

plan. This nylon sling could cut


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Working Under LoadsWorking Under Loads

Routes preplanned toensure no employee

required to workunder a suspendedload except:

Connectors

Employeesresponsible forhooking/unhookingthe load


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Working Under LoadsWorking Under Loads

When working undersuspended loads:

Routes shall bepre-planned

Materials shall berigged to preventunintentional

displacement Hooks shall have

self-closing latches


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Multiple Lift Rigging ProcedureMultiple Lift Rigging Procedure

(Christmas Treeing)(Christmas Treeing)

Multiple Lift Rigging

procedure - can be usedonly with:

Maximum of 5 members

Only structural members

Properly trained employees

Components shall bedesigned with a 5 to 1safety factor


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(Christmas Treeing)(Christmas Treeing) Total load shall not exceed

the rated capacity of thehoisting or rigging equipment

Rigging assembly shall be

rigged with the membersattached at their center ofgravity and maintained

reasonably level; rigged fromthe top down; rigged at least7 ft apart


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(Christmas Treeing)(Christmas Treeing)


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.754 Structural Steel Assembly.754 Structural Steel Assembly


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Structural

stabilitymaintainedat all times


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Permanent floors no

more than 8 floorsbetween the erection

floor and the upper-

most permanent floor No more than 4 floors

or 48 ft. of unfinished

bolting above theuppermost unfinished

floor


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A fully planked or decked floor or nets

within 2 floors or 30 ft.


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Walking/Working SurfacesWalking/Working Surfaces

Shear connectors shall not be attached to the

top flanges of beams, joistsor beam attachments so thatthey project vertically from orhorizontally across the top

flange of the member untilafter the decking has beeninstalled

shall not be laid out andinstalled until after thedecking has been installed,using the deck as a work

platform


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PerimeterBeam with

Bent Plate

Shear

studs onbridgebeams


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Skeletal Steel Construction

Workers shall not be permitted to walk thetop surface of any structural steel memberwhich has been finish coated with paint or

similar material, due to the potential forslip and fall hazards (unless the surface isno more slippery than the original steel

finish requires specific testing) (five year moratorium)



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Decking

Do not use strapping for hoisting

Loose items on top shall be secured Land bundles on supports to allow unbanding

At the end of a shift (or when environmental

conditions require), all decking must be secured



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Roof and Floor openings -Metal deck shall be installed

as follows: Framed deck openings shall

have structural membersturned down to allow continuous deckinstallation

Roof and floor openings shall be coveredduring the decking process



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Covers for roof and floor

openings must support,

without failure, twice the

maximum intended load.

All covers must be secured

All covers marked with highvisibility paint and the word

HOLE or COVER

Skylights must meet thesame load requirements



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Holes and openings not cutuntil essential to the

construction process, andimmediately protected

Space around columnsprotected



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Floor decking laid tightlyand secured

Derrick floors fully decked(derrick floors defined as

completed floors whereerection is being performed,along with storage areas onthose floors)


Documents

Steel Erection Standard Orientation PART2