Prescriptive Engineering Helix TM Above Grade Tables

Transcription

1 Prescriptive Engineering Helix TM Above Grade Tables TECHNICAL BULLETIN. ENGINEERING DESIGN Fox Blocks in collaboration with Helix Steel has developed alternative prescriptive reinforcement tables using Helix 5-25 Micro-Rebar for above grade walls. Any questions on the availability, design, approval and installation of Helix, contact Fox Blocks or Helix. The prescriptive design for the use of Helix 5-25 is in accordance to ACI-318 and the Helix Uniform Evaluation Service ER-279. The attached Helix tables and these instructions must be followed to ensure the engineering design and product is used correctly and effectively. The use of Helix Micro-Rebar eliminates most of the conventional horizontal and vertical rebar required in the wall assembly. Follow the tables to understand where conventional and vertical rebar is still required. APPROVAL: Helix meets all the design criteria and product approval for use in a Fox blocks wall assembly. Ensure the local building department and building inspectors are aware of and have provided approval of the design and use of Helix in the wall assembly prior to installation. Prior to use contact your local Ready-Mix supplier to co-ordinate use of Helix and batch mixing. Inform the concrete pumping company that micro-rebar will be used in the concrete mix. DESIGN: 1) Cross reference the Fox Blocks Prescriptive Tables requirements and the Helix Tables to focus on the specific design for the below grade wall. 2) Following the concrete specifications of the Helix tables. 3) Review the Notes on the Helix design tables for adequacy to replacement of horizontal rebar. 4) Note that all walls require a conventional horizontal rebar in the top course of the wall. 5) Note that conventional dowels are required at cold joints and connections per Fox Blocks tables. 6) Any conventional rebar used must have a lapped length of 60 times bar diameter 7) All openings and point loads must have conventional rebar as per the Fox Blocks Tables Fox Blocks. Revised 05/2017.

2 Prescriptive Engineering Helix TM Above Grade Tables TECHNICAL BULLETIN. ENGINEERING DESIGN ) Strictly follow the Helix specifications for dosage rated and mixed designs. 9) Follow Fox Blocks instructions for concrete placement and consolidation. DOSAGE: 1) Dosage and mix design must be as per Helix specifications 2) Co-ordinate mix with the Ready-Mix supply company, to be either at the plant or on-site at the truck. Wear required safety equipment and gloves when placing concrete. Refer to Technical Bulletin for Helix Above Grade Tables Fox Blocks. Revised 05/2017.

3 May 5, 2017 Re: Fox Blocks Prescriptive Engineering, Flat ICF Above Grade Walls Dear Engineer: Attached are Helix alternative reinforcement tables using Helix 5-25 with Fox Blocks flat ICF above grade walls. The tables are intended to mimic the Fox Blocks tables published in U.S. Prescriptive Engineering Specifications for ease of comparison. The Helix designs provide equivalent bending moment capacity to that of the original vertical rebar specified in the tables. Therefore, the Helix designs are subject to all restrictions and limitations of the original designs. All additional assumptions, requirements and recommendations are placed within the footnotes of the provided tables. The above grade walls have been designed in accordance with Uniform Evaluation Service, ER-279, and the designs are subject to all provisions of this report. Please note, we have provided two tables for the 4 ICF wall. These tables make a distinction between residential and commercial walls based on criteria of ER-279. Also, the Helix alternative tables do not include every wall height that is given within the original Fox Blocks prescriptive engineering tables. We have limited the maximum height on our Helix reinforcement tables. Some combinations of wall height, and wind speed exceed the capacity of a Helix only design. For these instances, a hybrid design has been provided. A hybrid design is a combination of Helix reinforcement and conventional steel reinforcement in the vertical direction. The Helix designs provided replaces the field reinforcement only. The designs do not replace any additional local reinforcement such as reinforcement around doors, windows and penetrations; dowels connecting walls to slabs or footings; corner bars; lintel bars; or tie bars at cold joints, etc. Concrete mix The mix should have a well-graded combined aggregate blend to maximize workability and minimize shrinkage cracking, segregation, and bleeding. Mix designs may require slight alterations to be optimized for Helix reinforcement. To ensure all requirements are met, Helix Steel should review the mix design prior to pour. The recommended minimum slump is 4 inches (100 mm). Please contact me with any questions you may have at X 53 or justin.idalski@helixsteel.com. Sincerely, Justin Idalski Justin Idalski, EIT Structural Engineer Helix Steel Jeff Novak Jeff Novak, PE VP Engineering Helix Steel Enclosure: Helix Alternative Reinforcement Tables Helix Steel 2300 Washtenaw Ave, Suite 201, Ann Arbor, Michigan phone: fax:

4 1, 2, 6, 7, 9, 11 4 INCH THICK FLAT ICF ABOVE GRADE RESIDENTIAL WALLS, HELIX 5-25 REINFORCEMENT MAXIMUM 3, 4, 5, 8, 12, 13, 14, 15 Top 10 Side lb/yd³ 10 lb/yd³ 9 9 lb/yd³ 13.5 lb/yd³ lb/yd³ 15 lb/yd³ lb/yd³ + 24" 15 lb/yd³ + 24" 8 9 lb/yd³ 10 lb/yd³ 9 10 lb/yd³ 13.5 lb/yd³ lb/yd³ 15 lb/yd³ lb/yd³ + 24" 15 lb/yd³ + 24" 8 10 lb/yd³ 13.5 lb/yd³ lb/yd³ 15 lb/yd³ lb/yd³ 15 lb/yd³ lb/yd³ + 24" 31.5 lb/yd³ + 16" 8 10 lb/yd³ 13.5 lb/yd³ lb/yd³ 15 lb/yd³ lb/yd³ 22.5 lb/yd³ lb/yd³ + 24" 31.5 lb/yd³ + 16" lb/yd³ 15 lb/yd³ lb/yd³ 15 lb/yd³ lb/yd³ 22.5 lb/yd³ lb/yd³ + 24" 31.5 lb/yd³ + 16" lb/yd³ + 16" 31.5 lb/yd³ + 16" lb/yd³ 15 lb/yd³ 9 15 lb/yd³ 22.5 lb/yd³ lb/yd³ 22.5 lb/yd³ lb/yd³ + 16" 31.5 lb/yd³ + 16" 8 15 lb/yd³ 15 lb/yd³ lb/yd³ 22.5 lb/yd³ lb/yd³ 30 lb/yd³ + 40" lb/yd³ 22.5 lb/yd³ lb/yd³ 22.5 lb/yd³ lb/yd³ 30 lb/yd³ + 40" Designs given in the unshaded rows of the above table are Helix Design Class B, and walls must conform to all restrictions of Section of ER Designs given in the shaded rows of the above table are Helix Design Class C, and walls must conform to all restrictions of Section of ER-279 except for the minimum wall thickness requirement. In addition, Helix Design Class C must meet the requirements of Section 5.6 of ER Helix Design Class C is not allowed in Seismic Design Categories C, D, E or F. 6. This table is based on concrete with a minimum specified compressive strength of 3000 psi for Helix Design Class B, 4000 psi for Helix Design Class C and reinforcing steel with a minimum yield 7. Table shall be used for residential construction only. Additional tables provide designs for commercial construction. 8. Conventional reinforcement (as required) to be placed at mid-depth of the concrete wall. 9. Deflection criterion is L/240, where L is the unsupported height of the wall in inches. 10. Top means gravity load from roof or floor construction bear on top of wall. Side means gravity load from floor construction is transferred to wall from a wood 11. Walls must be laterally supported at top and bottom of wall. See IRC 2015 Section R608 for exterior concrete wall construction. 12. Rebar lap splice length shall be 60 times the bar diameter. Dowels connecting footing to wall and connection between pours (cold joint) must be provided by conventional rebar; the use of a keyway with this table is prohibited. 13. Interpolation of Helix dosage or rebar size or spacing is not permitted. 14. The listed Helix 5-25 dosage rate is adequate to replace the required horizontal #4 bars at 32 inches. A #4 bar in the top course is required. 15. Where spaces have been left blank, the Helix design is outside the scope of this table. Contact Helix Steel to determine proper design.

5 1, 2, 5, 7, 9 4 INCH THICK FLAT ICF ABOVE GRADE COMMERCIAL WALLS, HELIX 5-25 REINFORCEMENT MAXIMUM 3, 4, 6, 10, 11, 12, 13 Top 8 Side lb/yd³ + 24" 15 lb/yd³ + 24" lb/yd³ + 24" 15 lb/yd³ + 24" lb/yd³ + 24" 31.5 lb/yd³ + 16" lb/yd³ + 24" 31.5 lb/yd³ + 16" lb/yd³ + 24" 31.5 lb/yd³ + 16" lb/yd³ + 16" 31.5 lb/yd³ + 16" lb/yd³ + 16" 31.5 lb/yd³ + 16" lb/yd³ + 24" 31.5 lb/yd³ + 16" lb/yd³ + 24" 31.5 lb/yd³ + 16" Designs given in the shaded rows of the above table are Helix Design Class C, and walls must conform to all restrictions of Section of ER-279 except for the minimum wall thickness requirement. In addition, Helix Design Class C must meet the requirements of Section 5.6 of ER Helix Design Class C is not allowed in Seismic Design Categories C, D, E or F. 5. This table is based on concrete with a minimum specified compressive strength of 4000 psi for Helix Design Class C and reinforcing steel with a minimum yield 6. Conventional reinforcement (as required) to be placed at mid-depth of the concrete wall. 7. Deflection criterion is L/240, where L is the unsupported height of the wall in inches. 8. Top means gravity load from roof or floor construction bear on top of wall. Side means gravity load from floor construction is transferred to wall from a wood 9. Walls must be laterally supported at top and bottom of wall. See IRC 2015 Section R608 for exterior concrete wall construction. 10. Rebar lap splice length shall be 60 times the bar diameter. Dowels connecting footing to wall and connection between pours (cold joint) must be provided by 11. Interpolation of Helix dosage or rebar size or spacing is not permitted. 12. The listed Helix 5-25 dosage rate is adequate to replace the required horizontal #4 bars at 32 inches. A #4 bar in the top course is required. 13. Where spaces have been left blank, the Helix design is outside the scope of this table. Contact Helix Steel to determine proper design.

6 1, 2, 4, 6, 8 6 INCH THICK FLAT ICF ABOVE GRADE WALLS, HELIX 5-25 REINFORCEMENT MAXIMUM 3, 5, 9, 10, 11 Top 7 Side lb/yd³ 9 lb/yd³ 12 9 lb/yd³ 9 lb/yd³ 11 9 lb/yd³ 9 lb/yd³ 12 9 lb/yd³ 9 lb/yd³ lb/yd³ 9 lb/yd³ 12 9 lb/yd³ 10 lb/yd³ lb/yd³ 10 lb/yd³ lb/yd³ 15 lb/yd³ lb/yd³ 10 lb/yd³ lb/yd³ 15 lb/yd³ 10 9 lb/yd³ 10 lb/yd³ lb/yd³ 13.5 lb/yd³ lb/yd³ 15 lb/yd³ 9 9 lb/yd³ 10 lb/yd³ lb/yd³ 13.5 lb/yd³ lb/yd³ 15 lb/yd³ lb/yd³ 15 lb/yd³ 9 9 lb/yd³ 10 lb/yd³ lb/yd³ 15 lb/yd³ lb/yd³ 15 lb/yd³ lb/yd³ 22.5 lb/yd³ 3. Designs given in the above table are Helix Design Class B, and walls must conform to all restrictions of Section or Section of ER This table is based on concrete with a minimum specified compressive strength of 3000 psi for Helix Design Class B, and reinforcing steel with a minimum yield 5. Conventional reinforcement (as required) to be placed at mid-depth of the concrete wall. 6. Deflection criterion is L/240, where L is the unsupported height of the wall in inches. 7. Top means gravity load from roof or floor construction bear on top of wall. Side means gravity load from floor construction is transferred to wall from a wood 8. Walls must be laterally supported at top and bottom of wall. See IRC 2015 Section R608 for exterior concrete wall construction. 9. Rebar lap splice length shall be 60 times the bar diameter. Dowels connecting footing to wall and connection between pours (cold joint) must be provided by 10. Interpolation of Helix dosage or rebar size or spacing is not permitted. 11. The listed Helix 5-25 dosage rate is adequate to replace the required horizontal #4 bars at 32 inches. A #4 bar in the top course is required.

7 MAXIMUM 3, 5, 9, 10, 11 Top 7 Side , 2, 4, 6, 8 8 INCH THICK FLAT ICF ABOVE GRADE WALLS, HELIX 5-25 REINFORCEMENT lb/yd³ 13.5 lb/yd³ lb/yd³ 13.5 lb/yd³ lb/yd³ 16 lb/yd³ lb/yd³ 13.5 lb/yd³ lb/yd³ 16 lb/yd³ lb/yd³ 13.5 lb/yd³ lb/yd³ 16 lb/yd³ lb/yd³ 22.5 lb/yd³ 3. Designs given in the above table are Helix Design Class B, and walls must conform to all restrictions of Section or Section of ER This table is based on concrete with a minimum specified compressive strength of 3000 psi for Helix Design Class B, and reinforcing steel with a minimum yield 5. Conventional reinforcement (as required) to be placed at mid-depth of the concrete wall. 6. Deflection criterion is L/240, where L is the unsupported height of the wall in inches. 7. Top means gravity load from roof or floor construction bear on top of wall. Side means gravity load from floor construction is transferred to wall from a wood 8. Walls must be laterally supported at top and bottom of wall. See IRC 2015 Section R608 for exterior concrete wall construction. 9. Rebar lap splice length shall be 60 times the bar diameter. Dowels connecting footing to wall and connection between pours (cold joint) must be provided by 10. Interpolation of Helix dosage or rebar size or spacing is not permitted. 11. The listed Helix 5-25 dosage rate is adequate to replace the required horizontal #4 bars at 16 inches. A #4 bar in the top course is required.

8 MAXIMUM 3, 5, 9, 10, 11 Top 7 Side , 2, 4, 6, 8 10 INCH THICK FLAT ICF ABOVE GRADE WALLS, HELIX 5-25 REINFORCEMENT lb/yd³ 10 lb/yd³ lb/yd³ 10 lb/yd³ 3. Designs given in the above table are Helix Design Class B, and walls must conform to all restrictions of Section or Section of ER This table is based on concrete with a minimum specified compressive strength of 3000 psi for Helix Design Class B, and reinforcing steel with a minimum yield 5. Conventional reinforcement (as required) to be placed at mid-depth of the concrete wall. 6. Deflection criterion is L/240, where L is the unsupported height of the wall in inches. 7. Top means gravity load from roof or floor construction bear on top of wall. Side means gravity load from floor construction is transferred to wall from a wood 8. Walls must be laterally supported at top and bottom of wall. See IRC 2015 Section R608 for exterior concrete wall construction. 9. Rebar lap splice length shall be 60 times the bar diameter. Dowels connecting footing to wall and connection between pours (cold joint) must be provided by 10. Interpolation of Helix dosage or rebar size or spacing is not permitted. 11. The listed Helix 5-25 dosage rate is adequate to replace the required horizontal #4 bars at 16 inches. A #4 bar in the top course is required.

9 MAXIMUM 3, 5, 9, 10, 11 Top 7 Side 7 and 130 1, 2, 4, 6, 8 12 INCH THICK FLAT ICF ABOVE GRADE WALLS, HELIX 5-25 REINFORCEMENT lb/yd³ 9 lb/yd³ lb/yd³ 9 lb/yd³ lb/yd³ 9 lb/yd³ lb/yd³ 9 lb/yd³ lb/yd³ 11 lb/yd³ lb/yd³ 11 lb/yd³ lb/yd³ 11 lb/yd³ 3. Designs given in the above table are Helix Design Class B, and walls must conform to all restrictions of Section or Section of ER This table is based on concrete with a minimum specified compressive strength of 3000 psi for Helix Design Class B, and reinforcing steel with a minimum yield 5. Conventional reinforcement (as required) to be placed at mid-depth of the concrete wall. 6. Deflection criterion is L/240, where L is the unsupported height of the wall in inches. 7. Top means gravity load from roof or floor construction bear on top of wall. Side means gravity load from floor construction is transferred to wall from a wood 8. Walls must be laterally supported at top and bottom of wall. See IRC 2015 Section R608 for exterior concrete wall construction. 9. Rebar lap splice length shall be 60 times the bar diameter. Dowels connecting footing to wall and connection between pours (cold joint) must be provided by 10. Interpolation of Helix dosage or rebar size or spacing is not permitted. 11. The listed Helix 5-25 dosage rate is adequate to replace the required horizontal #5 bars at 16 inches. A #5 bar in the top course is required.