Strescore - Home : OSCO Construction Group Concrete/Str… · · 2008-01-03Strescore Precast/Prestressed Concrete Hollow Core Plank 2007 edition ... should be recognized and dealt

StrescorePrecast/Pres tressed Concrete Hol low Core Plank2007 edi t ion

Corporate Office400 Chesley DriveSaint John, NB E2K 5L6Phone: 506-632-2600Fax: 506-632-7689

Website: www.strescon.comE-mail: [email protected]

Catalog No.: _____________

Date: ____________________

Strescon is a member of the OSCO Construction Group

New Brunswick Plant101 Ashburn RoadSaint John, NB E2L 3W2Phone: 506-633-8877Fax: 506-632-7576

Nova Scotia Plant131 Duke StreetBedford, NS B4A 2Z8Phone: 902-494-7400Fax: 902-494-7401

New England Office25 Burlington Mall RoadBurlington, MA 01803Phone: 781-221-2153Fax: 781-221-2155

INTRODUCTION TO STRESCORE PLANK

For the architect or consulting engineer, this manual is intended as aguide for working with Strescore plank using various constructionmethods.

Strescore plank is a precast, prestressed concrete member withcontinuous voids provided to reduce weight. It is commonly usedas a floor or roof deck.

Used as floor and ceiling assemblies, Strescore plank has anexcellent sound transmission class rating, ranging from about 50to 53 without topping. The impact insulation class rating starts atabout 26 for a plain plank, and may be increased to over 78 withthe addition of carpeting and underlay. Various fire ratings canalso be achieved depending on floor or ceiling finish.

Precast prestressed Strescore plank is extruded on long line castingbeds using zero slump concrete. The concrete is fed into theextruder and then forced into the compaction space using feedingscrews, which also push the extruder along the casting bed. Formingdies follow the feeding screws to give the required shape to thevoids. Once cured, the Strescore plank is then cut to length.

StrescoreP r e c a s t / P r e s t r e s s e d C o n c r e t e H o l l o w c o r e P l a n k

Introduction 1

NOISE ISREDUCED

STRESCOREPLANK


Introduction 2

ADVANTAGES OF STRESCORE PLANK

Strescore plank is widely known for providing economical andefficient floor and roof systems. The top surface can be prepared forinstallation of a floor covering by feathering the joints with a latexcement mix, installing non-structural fill concrete ranging from 1/2inch to 2 inches thick, or by pouring a composite structural concretetopping. The underside can be used as a finished ceiling either bypainting or by applying an acoustical spray.

Strescore plank is cambered as with most prestressed structuralmembers. Areas with differential cambers may cause a problem andshould be recognized and dealt with in the design layout. Walllocations may hide such a joint, but the door swing should bedirected to the least variable side.

Camber can also be accommodated by providing a topping. Thequantity of topping required must consider the amount of camberand the function of the floor.

Camber, camber growth, and deflections must be taken into accountin roofing details. Where changes in relative slab position occur,counterflashings are suggested to accommodate such changes.


Introduction 3

DESIGN RESPONSIBILITIES

Final design of the individualplank is usually theresponsibility of StresconLimited. The planks aredesigned according to thelatest requirements of ACIstandard 318 or CSAstandard A23.3, to carry theloads specified in the contractdocuments. The design of thesupporting structure, diaphramaction, lateral loads, bracinganchorage, and stability ofthe various components is theresponsibility of the projectengineer.

Lateral load transfer can beaccomplished by weld platesor grouted connections. Itshould be noted that PCIrecommends that prestressedconcrete components such asStrescore plank should not berigidly connected at both ends. This is to preventdamage to the plank or supporting structure due tocreep, shrinkage and temperature change movements

which occur in the plank.

All openings larger than 12”in size should be accuratelylocated on the drawings sothe effect on the Strescoreplank can be consideredduring the design.

Strescon Limited willgenerally produce a set oferection drawings consistingof layout, section, anddetailed drawings. Thelayout drawings will show thelocation of each plank aswell the location of openingsand any details which affectthe planks.

The architect or projectengineer should carefullyreview the erection drawingsduring the approval process

to ensure that openings are properly sized, located,and all details have been properly incorporated.

FRAMING CONCEPT

The primary consideration in developing a framingscheme using Strescore plank is the span length.Please refer to the load tables section forrecommended limits on Strescore plank.

Consideration must be given to factors such assuperimposed loads, partitions, or a large numberof openings. Each of these factors will result inhigher load capacity requirements. The fireresistance rating required for the application willalso affect the load capacity of a plank.

It is more economical to have the plan dimensionsfit the plank module. Non-module plan dimensionswill be accommodated using partial width planks,therefore, joint locations and overall detailingshould be discussed with Strescon Limited.

Construction tolerances must be accounted for indeveloping a plan layout. Tolerance on planklength should be accomodated by allowing a gapat the plank ends in the bearing detail.

Except for special situations, keyway grout isnormally a sand and Portland cement mixture inproportions of about 3:1. The amount of waterused will be determined by the method used to place the grout in the keyway. It will generally result in a wetmix. The configuration of the key is such that vertical load transfer can still occur with the presence of ashrinkage crack. Rarely is grout strength required in excess of 3000 psi.


Introduction 4


Introduction 5

STRESCORE PLANK: FROM START TO FINISHPRODUCTION


Introduction 6

QUALITY CONTROL

DELIVERY


Introduction 7

ERECTION & GROUTING


Introduction 8

TYPICAL APPLICATIONS

• INSTITUTIONAL

• APARTMENTS & CONDOS

• HOTELS/MOTELS

• RESIDENTIAL

• COMMERCIAL/INDUSTRIAL

• STUDENT HOUSING


Introduction 9

TYPICAL APPLICATIONS (CONTINUED)

Documents

Strescore - Home : OSCO Construction Group Concrete/Str… · · 2008-01-03Strescore Precast/Prestressed Concrete Hollow Core Plank 2007 edition ... should be recognized and dealt