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	SECTION 05260
	COMPOSITE JOIST ASSEMBLIES
	** NOTE TO SPECIFIER ** Hambro Structural Systems, A Division of Canam Steel Corp.; Composite Joist Assemblies. . This section is based on the products of Hambro Structural Systems, A Division of Canam Steel Corp., which is located at: 450 E. Hillsboro Blvd.. Deerfield Beach, FL 33441. Tel: (800) 546-9008. Fax: (954) 571-3031. Web: www.hambro.ws/. . Hambro designs, fabricates and sells a proven concrete floor system designed primarily for the multi-family housing construction market..Boasting a floor system that can be installed on any type of structure, Hambro is a trusted partner of real estate developers and residential building owners.
	PART 1	GENERAL
	1.1	SECTION INCLUDES
	** NOTE TO SPECIFIER ** Delete items below not required for project.
		A.	Composite Floor Systems.
		B.	Lightweight Composite Floor Systems.
	1.2	RELATED SECTIONS
	** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.
		A.	Section 03300: Cast-in-Place Concrete.
	1.3	REFERENCES
	** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.
		A.	ACI 301 - Specifications for Structural Concrete.
		B.	ACI 318 - Building Code Requirements for Structural Concrete.
		C.	AISC Specification for the Design of Cold-Formed Steel Structural Members.
		D.	ASTM A 1008 - Standard Specification for Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength Low-Alloy and High-Strength Low-Alloy with Improved Formability.
		E.	ASTM C 39 - Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens.
		F.	AWS D1.1 - Structural Welding Code-Steel.
		G.	Steel Joist Institute (SJI).
	1.4	DESIGN REQUIREMENTS
		A.	General:
			1.	Flexural Design: Ultimate Strength Method and as described by manufacturer.
			2.	Joist Top Chord Member: AISC Specification for the Design of Cold-Formed Steel Structural Members.
			3.	Joist Web and Bottom Chord Members: SJI.
			4.	Concrete Slab: ACI 318.
		B.	Joist Design: Design joists to resist the weight of the following:
			1.	Wet concrete (specified slab thickness).
			2.	Welded wire fabric reinforcement.
			3.	Formwork.
			4.	Rollbars.
			5.	Construction Load: 20 psf maximum.
		C.	Fire Rating: Design the floor / ceiling assembly to meet the requirements of:
			1.	UL Design Number: ____.
			2.	Fire Rating: _____ Hour.
			3.	Beam Rating: _____ Hour.
			4.	Slab Thickness: _______.
		D.	Sound Transmission Classification: Design the floor / ceiling assembly to meet the requirements of STC ______ / IIC ______.
	1.5	SUBMITTALS
		A.	Submit under provisions of Section 01300.
		B.	Product Data: Manufacturer's data sheets on each product to be used, including:
			1.	Preparation instructions and recommendations.
			2.	Storage and handling requirements and recommendations.
			3.	Installation methods.
		C.	Shop Drawings: Submit manufacturer's shop drawings indicating material lists, mark numbers, types, locations, and spacing of joists and accessories and special conditions requiring top or bottom bracing.
			1.	Use calculated dimensions on all shop drawings.
			2.	Scaling of drawings is not permitted.
		D.	Product Certificates: Submit signed manufacturer's product certificates, affirming that materials comply with requirements specified in this section.
		E.	Welders' Certifications: Submit welders' certifications signed by Contractor certifying welders comply with Quality Assurance requirements.
		F.	Samples: For each finish product specified, one sample representing actual product, color, and patterns.
	1.6	QUALITY ASSURANCE
		A.	Manufacturer Qualifications: All primary products specified in this section will be supplied by a single manufacturer with a minimum of ten (10) years experience.
		B.	Installer Qualifications: All products listed in this section are to be installed by a single installer with a minimum of five (5) years demonstrated experience in installing products of the same type and scope as specified.
		C.	Welding Materials and Methods of Fabrication: Manufacturer's standard shop practice.
		D.	Welders' Qualifications: Certify that each welder is AWS certified in accordance with AWS D1.1.
			1.	Joist Repairs and Modifications in Field: Performed by AWS certified welders in accordance with AWS D1.1.
	** NOTE TO SPECIFIER ** Include a mock-up if the project size and/or quality warrant taking such a precaution. The following is one example of how a mock-up on a large project might be specified. When deciding on the extent of the mock-up, consider all the major different types of work on the project.
		E.	Mock-Up: Provide a mock-up for evaluation of surface preparation techniques and application workmanship.
			1.	Finish areas designated by Architect.
			2.	Do not proceed with remaining work until workmanship, color, and sheen are approved by Architect.
			3.	Refinish mock-up area as required to produce acceptable work.
	1.7	DELIVERY, STORAGE, AND HANDLING
		A.	Store products in manufacturer's unopened packaging until ready for installation.
		B.	Store and dispose of hazardous materials, and materials contaminated by hazardous materials, in accordance with requirements of local authorities having jurisdiction.
		C.	Delivery:
			1.	Deliver joists to site banded in nested bundles and tagged with identification plate attached at 1 end, at joist shoe.
			2.	Indicate on Joist Identification Plates:
				a.	Manufacturer.
				b.	Country (Plant).
				c.	Project number.
				d.	Joist mark.
		D.	Storage:
			1.	Store materials in accordance with manufacturer's instructions.
			2.	Protect materials from corrosion, deformation, and other damage.
			3.	Store joists upright on level surface, off ground.
			4.	Do not stack joists.
		E.	Handling:
			1.	Protect joists from damage during unloading, storage, handling, and installation.
			2.	Hoist joists by crane in accordance with manufacturer's instructions.
	1.8	PROJECT CONDITIONS
		A.	Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's absolute limits.
	1.9	WARRANTY
		A.	At project closeout, provide to Owner or Owners Representative an executed copy of the manufacturer's standard limited warranty against manufacturing defect, outlining its terms, conditions, and exclusions from coverage.
	PART 2	PRODUCTS
	2.1	MANUFACTURERS
		A.	Acceptable Manufacturer: Hambro Structural Systems, Div. Canam Steel Corp., which is located at: 450 E. Hillsboro Blvd. ; Deerfield Beach, FL 33441; Toll Free Tel: 800-546-9008; Tel: 954 571 3030; Fax: 954-571-3031; Email: request info; Web: www.hambro.ws
	** NOTE TO SPECIFIER ** Delete one of the following two paragraphs; coordinate with requirements of Division 1 section on product options and substitutions.
		B.	Substitutions: Not permitted.
		C.	Requests for substitutions will be considered in accordance with provisions of Section 01600.
	2.2	COMPOSITE FLOOR JOIST SYSTEM
	** NOTE TO SPECIFIER ** Retain the following Paragraph if the D-500 or MD-2000 systems are specified.
		A.	Joists:
			1.	Joist Depth: As indicated on the Contract Drawings.
			2.	Top Chord Member: Continuous shear connector.
				a.	Material: ASTM A 1008, Grade 50, cold-rolled steel, 13 gauge minimum.
				b.	Yield Strength (Fy): 50,000 psi minimum.
			3.	Bottom Cord Member:
				a.	Material: Hot-rolled or cold-rolled steel angles.
				b.	Yield Strength (Fy): 50,000 psi minimum.
			4.	Web Members:
				a.	Material: Hot-rolled steel bars, 7/16 inch (11mm) diameter minimum, some continuous; Bent at top chord joist locations.
				b.	Yield Strength (Fy): 44,000 psi minimum.
			5.	Shop Painting: Rust-inhibitive primer.
	** NOTE TO SPECIFIER ** Retain the following Paragraph if the D-510 system is specified.
		B.	Joists:
			1.	Joist Depth: As indicated on the Contract Drawings.
			2.	Material: Cold rolled top chord, bottom chord and web plate member:
				a.	Material: ASTM A 1008, Grade 50, cold-rolled steel, 13 gauge minimum.
				b.	Yield Strength (Fy): 50,000 psi minimum.
			3.	Shop Painting: Rust-inhibitive primer.
		C.	Rollbars: Temporary bridging and spacers for joists.
			1.	Removable. Designed to support the following loads until concrete has reached a minimum compressive strength of 500 psi as determined by testing concrete cylinders in accordance with ASTM C 39 and formwork is removed.
				a.	Plywood forms.
				b.	Slab dead weight.
				c.	Welded wire fabric weight.
				d.	Construction Load: 40 psf.
			2.	Material: Steel.
		D.	Standard Bearing Shoes:
			1.	Material: Steel.
			2.	Angle Shape: 4 inches by 1 3/4 inches by 1/4 inch, 4 3/4 inches wide, (102mm x 44.5mm x 6mm x 120.5mm) unless indicated otherwise on the Contract Drawings.
			3.	Shop Painting: Rust-inhibitive primer.
		E.	Forms: Plywood.
			1.	Dimensions: 4 feet by 8 feet (1219mm x 2438mm) typical.
	** NOTE TO SPECIFIER ** Select Form Plywood Thickness. Delete three of the next four paragraphs.
			2.	Thickness: 3/8 inch (10mm).
			3.	Thickness: 1/2 inch (13mm).
			4.	Thickness: 5/8 inch (15mm).
			5.	Thickness: 3/4 inch (19mm).
	** NOTE TO SPECIFIER ** Select slab material. Delete one of the next two paragraphs.
		F.	Concrete:
			1.	Minimum Ultimate Compressive Strength, (f'c): 3,000 psi at 28 days.
			2.	Standard Weight: 145 pcf.
			3.	Maximum Aggregate Size: 3/4 inch (19mm).
			4.	As specified in Section 03300, unless otherwise noted in this section.
		G.	Concrete Reinforcement: Welded wire fabric.
			1.	Size: As indicated on the Drawings.
			2.	Fy: 60,000 psi minimum.
			3.	Flat sheets. Do not use rolls.
			4.	As specified in Section 03300 unless otherwise noted in this section.
	2.3	FABRICATION
		A.	Fabrication: Manufacturer's standard shop practice.
		B.	Joist Top Chord: Fabricate joist top chord to allow for 1 1/2 inch (38mm) embedment into concrete slab.
		C.	Joist Cambers: Camber is optional; but when provided, approximate camber shall be as follows:
			1.	Joist Span 15 Feet to 20 Feet (4572mm to 6096mm): 1/2 inch to 3/4 inch (13mm to 19mm) prefabricated camber.
			2.	Joist Span 20 Feet to 25 Feet (6096mm to 7620mm): 3/4 inch to 7/8 inch (19mm to 21mm) prefabricated camber.
			3.	Joist Span 25 Feet to 30 Feet (7620mm to 9144mm): 7/8 inch to 1 1/16 inch (21mm to 27mm) prefabricated camber.
			4.	Joist Span 30 Feet to 40 Feet (9144mm to 12192mm): 1 1/16-inch to 1 1/2-inch (27mm to 38mm) prefabricated camber.
	2.4	SOURCE QUALITY CONTROL
		A.	Joists: Manufacturer's facility having continuous quality control program and subjected to plant inspections by approved independent agency will inspect the following tolerances:
			1.	Size.
			2.	Span.
			3.	Assembly.
			4.	Welds.
	PART 3	EXECUTION
	3.1	EXAMINATION
		A.	Examine areas to receive composite floor joist system.
		B.	Notify Engineer of conditions that would adversely affect installation.
		C.	Do not start installation until unsatisfactory conditions are corrected.
	3.2	INSTALLATION
		A.	Install composite floor joist system in accordance with the following:
			1.	Manufacturer's installation manual.
			2.	Approved erection drawings.
			3.	Amendments issued by manufacturer.
		B.	Construction Loads:
			1.	Do not exceed load carrying capacity of composite floor joist system with construction loads.
			2.	Concentrated Construction Loads: Do not place concentrated construction loads; such as bundles of plywood, sheetrock, or rollbars; exceeding design load of slab on composite floor joist system; but rather on supporting walls or beams.
			3.	Concentrated Construction Loads Exceeding Design Load Capacity: Concentrated construction loads exceeding design load capacity of composite floor joist system shall be fully supported and shored to grade.
		C.	Erect joists level, plumb, and to proper locations and elevations.
		D.	Perform shimming as required with metal shim material, ensuring total shoe contact.
		E.	Indicate on erection drawings prepared by manufacturer, standard conditions for bottom chord bridging.
		F.	Indicate on erection drawings prepared by manufacturer, special conditions requiring top and/or bottom bracing.
		G.	End Anchorage: Anchor or embed joist shoes as indicated on the Contract Drawings.
		H.	Joist Sweep: After installation, allowable joist sweep shall be 1 inch (25mm) in 20 feet (6096mm).
		I.	Minimum Joist Bearing:
			1.	Steel Supports: 2 1/2 inches (63.5mm).
			2.	Masonry and Concrete Supports: 3 1/2 inches (89mm).
			3.	Bearing Capacity of Supporting Units: Comply with applied shoe end reaction, based on minimum supplied bearing area as follows:
				a.	Bearing on Structural Steel: 11.8 square inches (76.1 sq. cm).
				b.	Other Bearing Conditions: 16.6 square inches (107.1 sq. cm).
		J.	Damaged Joists:
			1.	Do not install damaged joists.
			2.	Repair or replace damaged joists before installation.
			3.	Do not make field repairs to damaged joists without written approval from manufacturer and Engineer.
			4.	Make repairs to damaged joists in accordance with repair details from manufacturer.
			5.	Receive written approval from Engineer of joist repair before installation.
	3.3	CONCRETE PLACEMENT
		A.	Concrete:
			1.	In accordance with ACI 301.
			2.	As specified in Section 03300, unless specified otherwise in this section.
		B.	Welded Wire Fabric:
			1.	Laps: In accordance with ACI 318.
			2.	As specified in Section 03300, unless specified otherwise in this section.
		C.	Place concrete to slab thickness as indicated on the Contract Drawings. Do not place concrete in excess of thickness indicated.
		D.	Maintain minimum depth of concrete cover above joist top chord in accordance with Manufacturer's instructions.
		E.	Construction Loads: Do not drop loads of concrete in concentrated areas over joists.
		F.	Vibrate concrete lightly but thoroughly. Ensure full encasement of joist top chord in concrete.
		G.	Construction Joints:
			1.	Parallel to Joists:
				a.	Locate construction joints midway between joists.
				b.	Do not locate construction joints closer than 6 inches from top chord.
			2.	Perpendicular to Joists:
				a.	Locate construction joints over supporting wall or beam.
		H.	Formwork Removal: Remove formwork after concrete has reached a minimum compressive strength of 500 psi, as determined by testing concrete cylinders in accordance with ASTM C 39.
	3.4	PROTECTION
		A.	Protect concrete from foot traffic until concrete has reached a minimum compressive strength of 1,000 psi, as determined by testing concrete cylinders in accordance with ASTM C 39.
	END OF SECTION