lite-span aluminum gangway tm · aluminum and steel structures for industrial applications. typical...

Lite-Span Aluminum GangwayTM

www.hallsten.com

H A L L S T E NH A L L S T E N

INDUSTRIAL • MARINE • ENVIRONMENTAL

SACRAMENTO, CA (800) 473-7440



C O R P O R A T I O NC O R P O R A T I O N

ALUMINUM STRUCTURES BYALUMINUM STRUCTURES BY

Quality•Integrity•IngenuityQuality•Integrity•Ingenuity

H A L L S T E N



C O R P O R A T I O N

ALUMINUM STRUCTURES BY

Quality•Integrity•Ingenuity

H A L L S T E N





Quality•Integrity•IngenuityH A L L S T E N C O R P O R A T I O N • 1 - 8 0 0 - 4 7 3 - 7 4 4 0 • W W W . H A L L S T E N . C O MH A L L S T E N C O R P O R A T I O N • 1 - 8 0 0 - 4 7 3 - 7 4 4 0 • W W W . H A L L S T E N . C O M

Hallsten Corporation has developed a full line of structuralaluminum products. These products are based on a structuralsystem that has evolved through our experience in the designand fabrication of metal structures since 1966. These variousproducts are used in marine, industrial and environmentalapplications. The basis for the structural system is a unique setof interlocking aluminum components. The use of thesecomponents provides a structural system that is very versatile,can be used in a variety of structures and provides unmatchedstrength and durability.

In the early 1970's Hallsten Corporation pioneered the use ofaluminum components for the construction of structures to beused in a marine environment. The extreme corrosionresistance of aluminum in combination with the inherentstrength of aluminum extrusions provided the basis for amarine structural system that provided unmatched quality andvalue. These early structures were fullyassembled with welded connections.Hallsten Corporation continued torefine the design of these structures andby the 1980's had eliminated themajority of the welds required toassemble the components. The weldedconnections were replaced with detailsthat included specialized adhesives aswell as nonthreaded mechanicalconnectors. Where welds wereretained, the welds were designed tominimize the effect of fatigue inducedin the heat effected areas. These weldswere located in areas with minimalcyclical loading. Additionally, theremaining welded connections weredesigned with longer individual welds,

which tend to be more fatigue resistant. The weldless designproved to be highly fatigue resistant as well as much morestructurally efficient than a fully welded design due to theelimination of these heat effected areas and their correspondingallowable stress reductions.

The weldless structural design resulted in the issuance of UnitedStates Patent number 5,050,361, “Deck Structure”. Thisstructural system is comprised of panels that include the

primary structural beam section as aframe member for the decking system.When assembled, the structurebecomes self-framing as well as self-supporting.

Hallsten Corporation has established areputation for our unique ability tocreate products that employ modularstructural systems. These productsallow Hallsten Corporation toengineer specific structures utilizing afamily of predesigned components.The result is high performance,efficient structures at very competitiveprices. Hallsten Corporation continuesto provide design-build structures to avariety of industries. In addition toaluminum and steel structures for

marine applications, Hallsten Corporation provides aluminumcovers for wastewater and water treatment plants, andaluminum and steel structures for industrial applications.Typical of these are industrial mezzanines, stairways and rampsystems, conveyor crossovers and bridging structures as well assteel truss bridges for pedestrian and light vehicle use.

Hallsten Corporation A Technical Overview

SPECIFICATIONS FOR LITE-SPAN ALUMINUM GANGWAYTM








Quality•Integrity•IngenuityQuality•Integrity•IngenuityH A L L S T E N C O R P O R A T I O N • 1 - 8 0 0 - 4 7 3 - 7 4 4 0 • W W W . H A L L S T E N . C O M

I. GENERAL

1.These specifications are for a fullyCAD designed and engineered clearspan aluminum gangway and arethe minimum standards for designand fabrication. Gangways shall bedesigned and manufactured byHallsten Corporation, P.O. Box41036, Sacramento, CA 95841.Phone: (800) 473-7440, Fax:(916) 331-7223.

2.Finish work shall be firm, wellanchored, in true alignment,properly squared, with smoothclean uniform appearance, withoutholes, cracks, discoloration,distortion, stains, or marks.Products shall be fabricated so thatconnections between products,materials and alignment, areconsistent with the drawings.

SPECIFICATION:

PRODUCTS:

3. Furnishall labor and materials to provide acomplete pre-fabricated custom-s i z e d a l u m i n u m g a n g w a y.Hallsten's custom gangways alsoinclude a transition ramp, wheels,rub plates, and a shore hinge plate.

SCOPE OF WORK: 4.A. ASTM – American Society of

Testing Materialsi. B209 – Standard Specification for

Aluminum and Aluminum-AlloySheet Plate.

ii. B221 – Standard Specification forAluminum and Aluminum-AlloyExtruded Bars, Rods, Wire,Profiles & Tubes.

B. AWS – American Welding Societyi. D1.2 – Structural Welding Code –

AluminumC. Aluminum Design Manual,

Aluminum Associationi. “Specifications for Aluminum

Structures” for bridge-typestructures

D. United States Access Boardi. “Americans with Disabilities Act

and Architectural Barriers ActAccessibility Guidelines,” July 23,2004, “ADA AccessibilityGuidelines for RecreationFacilities”.

REFERENCES:

THROUGHOUT THE WORLD

GANGWAYS PERFORM IN EVERY ENVIRONMENT,

MEET TIME AND COST BUDGETS, AND

ENHANCE THE MARINA DESIGN

, HALLSTEN LITE-SPAN ALUMINUMTM

SAMPLE ISOMETRIC DRAWINGS

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All Widths and Lengths

Any Specified Loading

Custom Details As Required

Attractive Sand-Matte and Brushed Finish

Unparalleled Safety and Skid Resistance H A L L S T E N






STANDARD 4' X 30' GANGWAY WITH 2 HORIZONTAL RAILS

LITE-SPAN 4' X 30' GANGWAY WITH 3 HORIZONTAL RAILS

STANDARD 4' X 30' GANGWAY WITH MULTIPLE HORIZONTAL

RAILS TO MEED ADA & UBC REQUIREMENTS

VIERENDEEL TRUSS 4' X 80' GANGWAY WITH

MULTIPLE HORIZONTAL RAILS TO MEET

ADA & UBC REQUIREMENTS

The attractive “no maintenance” solution forGangways - in fresh or salt water. Free yourself fromall maintenance problems, save on costs, withmarine alloy aluminum gangways which retain theirattractive appearance.

The marine alloy aluminum used in Lite-SpanGangways resists corrosion. Will not rot, split, orrust. Needs no painting or other protective coatings.

Lite-Span Gangways structures can be engineeredto meet your existing conditions. Completeboarding systems for complex boardingconfigurations can be accommodated.

Lite-Span Gangways decking provides safetyunderfoot for shod or bare feet. A unique decksurface treatment provides unparalleled slipresistance - dry or wet. No ecological hazards arecreated by aluminum in any water. Lite-Spangangways structures can be designed to meet anyload and spanning requirements.

Lite-Span Gangways are fabricated of highstrength, marine aluminum alloy. All assembly is byGas Metal Arc Welding using the latest techniques inwelding technology. Wherever possible, automaticwelding processes are employed to assure highquality construction. The welding assembly and theinherit properties of aluminum provide a gangwaystructure which is maintenance free and which willretain a new appearance through years of service.

Aluminum’s light weight, combined with itsstrength and the rugged construction of Lite-Spangangways, makes them easier to handle thangangways of any other material. They may betransported with light vehicles. In most cases, theycan be put into place or removed without cranes orspecial equipment.

Lite-Span Gangways by Hallsten Corporationmake you money. With sound, efficient engineeringand design, high quality fabrication, and nomaintenance requirements, Lite-Span gangwaysystems assure a high return on your marineequipment investment.

TM

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• MAINTENANCE FREE

• VERSATILE

• COMFORTABLE and SAFE

• DURABLE

• EASY TO USE

• THE BOTTOM LINE

LITE-SPAN MARINE GANGWAYSTM









VIERENDEEL TRUSS GANGWAY CROSS SECTION

STANDARD GANGWAY CROSS SECTION

H A L L S T E N






II. ENGINEERING

III. QUALIFICATIONS

1. MANUFACTURER: Shall bea company specialized inproviding pre-fabricated custom-sized aluminum gangways for atleast ten (10) years. Whenrequested by the Engineer,submit written evidence to showexperience qualifications and

adequacy for performance of contractrequirements.

Qualified within thepast two (2) years in accordance withAWS.

2. WELDERS:

IV. PERFORMANCE

1. SPAN:

2. WIDTH:

The clear span length of thegangway shall be as noted in thescope of work.

The inside width of thegangway shall be as noted in thescope of work.

3. DISTRIBUTED DESIGNLIVE LOAD ANDDEFLECTION:

4. CONCENTRATED LIVELOAD:

5. FLOTATION LIVE LOAD:

6. DESIGN STRESSES:

All structuralcomponents shall be designed tosupport the dead weight of thestructure, plus a live load of 50pounds per square foot of surface.The maximum deflection of anycomponent under this load shallnot exceed L/240 of the span ofthat component.

All structuralcomponents shall be designed tosupport a 400 pound load on a6” X 6” area located anywhere onthe surface of the structurewithout permanently deformingthe tested area.

For the purposes of calculatingthe freeboard of a docksupporting the gangway, the liveload can be assumed to be 20pounds per square foot.

Allallowable design stresses instructural aluminum shall be inaccordance with the“Specifications of AluminumStructures” for bridge-typestructures by the AluminumAssociation.

1. SUBMITTALS:

A. SHOP DRAWINGS:

B. STRUCTURALCALCULATIONS:

C. CERTIFICATIONS:

The submittalshall include:

Indicate pertinentdimensioning, materials,clearances, generalconstruction, materials,finishes and connections.Shop drawings stamped by aState of California LicensedCivil Engineer.

Calculations stamped by aLicensed ProfessionalEngineer, if required.

Cutsheets or certificates ofcompliance, as appropriate.









VI. FABRICATION &WORKMANSHIP

1. WORKMANSHIP:

2. EXPERIENCE:

3. FINISH:

The quality ofworkmanship shall be equal to thebest general practice in modernstructural fabrication shops.Fabrication shall occur in the shopwhen possible.

The fabricatormust be able to furnish adequateevidence of a minimum of ten (10)years of ongoing successful experiencein fabricating bridge-type aluminumstructures, and that all workmenemployed in aluminum fabrication areproperly experienced and skilled inthe work they are called upon toperform.

Before finishes are applied,exposed aluminum sheets, plates, andextrusions shall be free of roll marks,scratches, rolled-in scratches, kinks,stains, pits, orange peel, die marks,structural streaks, and any other

V. MATERIALS

1. ALUMINUM:

2. DECKING SURFACE:

3. HANDRAIL:

Aluminum shallbe marine grade series 6061-T6or 6063-T6.

Decking surface shall be knurledand sandblasted to provide anaggressive non-skid surface andshall be installed perpendicular tothe slope of the gangway. Deckslats shall be Hallsten's doubleinterlocking deck slat, so thatadjacent slats will act together.

Top of guard railshall be 42” above decking. Toprail shall be 1½” schedule 40aluminum pipe. The handrailshall be fabricated with multipleintermediate rails such that a 4”sphere cannot pass through therail at any point (UBCrequirement). Intermediate railsshall be 1¼” diameter by 1/8”wall aluminum tubes. Thehandrail shall be fabricated withstraight horizontal rails with endsfinished with plastic end closurecaps. The handrail shall befabricated with an interior projecthandrail located 34” above the

deck with end loops at both endsof the gangway extending 12”past the end of the beams (ADArequirements). Handrail shall be1-1/2” diameter by 1/4” wallaluminum tube.

Wheels shall be 6”diameter by 2” wide and beinstalled at the lower end of thegangway. The wheels shall beDelrin with a 1” stainless axle. Agrease fitting shall be providedfor lubrication. The axle shall passthrough doubler plates welded tothe box beam frame.

Utilities(electrical, water, gas and sewer)shall be attached to the undersideof the gangway by means of analuminum utility hanger trackframing system.

Ahinged transition ramp shall beprovided at the lower end of thegangway to make a smoothtransition between the gangwaydeck and the landing. Thistransition ramp designed to slideon the landing should be the fullwidth of the deck and extend out

4. WHEELS:

5. UTILITIES:

6. TRANSITION RAMP:

from the gangway end 4 feetminimum.

Wheel tracksfor the gangway wheels shall bealuminum angles.

Rub plates for thegangway transition plate shall bealuminum flat bar.

Shorehinge plate shall conform to ASTMA-36 and shall be hot-dip galvanizedwith a minimum of 2 ounces of zincper square foot of surface afterfabrication. Shore hinge plate shall be6”wide by 12” longer than gangwaywidth and of 3/8” material. The hingeplate shall have two (2) 6” long1½”schedule 40 pipe segmentswelded on to match gangway hinge.

7. WHEEL TRACKS:

8. RUB PLATES:

9. SHORE HINGE PLATE:

MAILING ADDRESS:P.O. Box 41036

Sacramento, CA 95841Tel: (916) 331-7211Fax: (916) 331-7223

PLANT ADDRESS:6944 34th Street

North Highlands, CA 95660

H A L L S T E N





Quality•Integrity•Ingenuity








Quality•Integrity•IngenuityQuality•Integrity•Ingenuity

www.hallsten.com

VIII. DELIVERY & STORAGE

1. DELIVERY:

2. STORAGE:

Delivery of the gangway will be made tothe location nearest the site which is accessible to over-the-road trucks, unless otherwise specified.

Store units at project site to preventvandalism or damage from work of other trades.

defects which will affect uniform appearance of finishedsurfaces. The gangway structure shall be given an AA-M44 (coarse matte) sandblasted finish after fabrication.The handrails shall have a rubbed or light brushed finish.

All aluminum welding, weldingprocedures, testing and inspection shall be done inaccordance with AWS D1.2. Parts to be welded shall befree of dirt, grease and other contaminants and shall fitup properly for sound welding. Surfaces may not be cutwith oxygen. Sawing, sheering or machining may beused. All welding shall be with an inert gas shielded arcprocess. Machine settings shall be developed by makingtest welds of the same material alloy and geometry as realmembers and testing the sample welds destructively.

The purchaser will be responsiblefor unloading the gangway from the truck and placing itinto position. The gangway fabricator will notify thepurchaser in advance of the expected time of arrival.

4. WELDING:

5. COORDINATION:

VI. FABRICATION & WORKMANSHIP

lite-span aluminum gangway tm · aluminum and steel structures for industrial applications. typical...

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