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Vista Canadian Design Manual - Pages 2-11

Manufactured by: BW Vista RailingsTel: 1-800-667-8247 Fax: 604-467-1197 ManualDesigners & Installers Engineers & Architects6th Edition Vista Design Manual Canadian ../2 ALCO VENTURES INC. TABLE OF CONTENTS TABLE OF CONTENTS .. 2 LIST OF .. 3 LIST OF .. 3 INTRODUCTION .. 4 GENERAL Design .. 4 Design CRITERIA .. 5 Loadings .. 5 Factors Of Safety .. 5 MATERIALS AND PROPERTIES .. 6 Mechanical Properties Of Aluminum Alloys And Elements .. 6 Physical Properties Of Guardrail Elements .. 6 ELEMENT AND SYSTEM LOAD CAPACITIES .. 9 LOAD DISTRIBUTION .. 9 ANCHORAGE .. 9 WEAKNESS IN WELDED ALUMINUM .. 18 Design PROCEDURES .. 18 Top Rail Design .. 18 Post Design .. 19 Design .. 19 WIND LOADING .. 19 GUARDRAIL HEIGHT VARIATIONS .. 20 GUARDRAIL SYSTEMS WITH ALUMINUM PICKET INFILL.

Vista Design Manual – CANADIAN .../4 ALCO VENTURES INC. 1.0 INTRODUCTION Permanent guardrail systems are required near or at the open sides of elevated walking/viewing surfaces for the

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Transcription of Vista Canadian Design Manual - Pages 2-11

1 Manufactured by: BW Vista RailingsTel: 1-800-667-8247 Fax: 604-467-1197 ManualDesigners & Installers Engineers & Architects6th Edition Vista Design Manual Canadian ../2 ALCO VENTURES INC. TABLE OF CONTENTS TABLE OF CONTENTS .. 2 LIST OF .. 3 LIST OF .. 3 INTRODUCTION .. 4 GENERAL Design .. 4 Design CRITERIA .. 5 Loadings .. 5 Factors Of Safety .. 5 MATERIALS AND PROPERTIES .. 6 Mechanical Properties Of Aluminum Alloys And Elements .. 6 Physical Properties Of Guardrail Elements .. 6 ELEMENT AND SYSTEM LOAD CAPACITIES .. 9 LOAD DISTRIBUTION .. 9 ANCHORAGE .. 9 WEAKNESS IN WELDED ALUMINUM .. 18 Design PROCEDURES .. 18 Top Rail Design .. 18 Post Design .. 19 Design .. 19 WIND LOADING .. 19 GUARDRAIL HEIGHT VARIATIONS .. 20 GUARDRAIL SYSTEMS WITH ALUMINUM PICKET INFILL.

2 20 GUARDRAIL SYSTEMS WITH GLASS PANEL INFILL .. 20 FASCIA MOUNTED POSTS .. 21 LETTER OF CONFORMANCE .. 22 BW Vista RAILINGS Design Manual Canadian ../3 ALCO VENTURES INC. LIST OF FIGURES FIGURE 1: MAIN ELEMENTS OF GUARDRAIL SYSTEMS .. 4 FIGURE 2: TYPICAL CROSS SECTIONS OF COMMON GUARDRAIL ELEMENTS .. 8 FIGURE 3: ACCEPTABLE GUARDRAIL MOUNTING CONFIGURATIONS .. 12 FIGURE 4: GUARDRAIL CONFIGURATIONS .. 23 FIGURE 4A: 42" HIGH ALLOWABLE CONFIGURATIONS TYPE 1A .. 24 FIGURE 4A A: 42" HIGH ALLOWABLE CONFIGURATIONS TYPE 1A ALTERNATE .. 25 FIGURE 4B: 42" HIGH ALLOWABLE CONFIGURATIONS TYPE 1B .. 26 FIGURE 4B A: 42" HIGH ALLOWABLE CONFIGURATIONS TYPE 1B ALTERNATE .. 27 FIGURE 4C: 42" HIGH ALLOWABLE CONFIGURATIONS TYPE 1C .. 28 FIGURE 4D: 42" HIGH ALLOWABLE CONFIGURATIONS TYPE 1D .. 29 FIGURE 4E: 42" HIGH ALLOWABLE CONFIGURATIONS TYPE 1E.

3 30 FIGURE 4F: 42" HIGH ALLOWABLE CONFIGURATIONS TYPE 2A .. 31 FIGURE4G: 42" HIGH ALLOWABLE CONFIGURATIONS TYPE 2B .. 32 FIGURE 4H: 42" HIGH ALLOWABLE CONFIGURATIONS TYPE 3A .. 33 FIGURE 4H A: 42" HIGH ALLOWABLE CONFIGURATIONS TYPE 3A ALTERNATE .. 34 FIGURE 4I: 42" HIGH ALLOWABLE CONFIGURATIONS TYPE 3B .. 35 FIGURE 4I A: 42" HIGH ALLOWABLE CONFIGURATIONS TYPE 3B ALTERNATE .. 36 FIGURE 4J: 42" HIGH ALLOWABLE CONFIGURATIONS TYPE 3C .. 37 FIGURE 4K: 42" HIGH ALLOWABLE CONFIGURATIONS TYPE 3D .. 38 FIGURE 4L: 42" HIGH ALLOWABLE CONFIGURATIONS TYPE 4A .. 39 FIGURE 4M: 42" HIGH ALLOWABLE CONFIGURATIONS TYPE 4B .. 40 FIGURE 4N: 42" HIGH ALLOWABLE CONFIGURATIONS TYPE 5A .. 41 FIGURE 4O: 42" HIGH ALLOWABLE CONFIGURATIONS TYPE 5B .. 42 FIGURE 4P: 42" HIGH ALLOWABLE CONFIGURATIONS TYPE 6A .. 43 FIGURE 4P A: 42" HIGH ALLOWABLE CONFIGURATIONS TYPE 6A ALTERNATE.

4 44 FIGURE 4Q: 42" HIGH ALLOWABLE CONFIGURATIONS TYPE 6B .. 45 LIST OF TABLES TABLE 1: MECHANICAL PROPERTIES OF ALUMINUM ALLOYS AND ELEMENTS .. 6 TABLE 2: PHYSICAL PROPERTIES OF COMMON ELEMENTS .. 7 TABLE 3: ALCO VENTURES INC. TESTING RESULTS .. 10 BW Vista RAILINGS Vista RAILINGS LTD. TESTING RESULTSV ista Design Manual Canadian ../4 ALCO VENTURES INC. INTRODUCTION Permanent guardrail systems are required near or at the open sides of elevated walking/viewing surfaces for the purpose of minimizing the potential of an accidental fall to a lower level. Aluminum guardrail assemblies are commonly comprised of straight sections of top rail elevated and supported above a floor by uniformly spaced posts. The posts are anchored to the floor system by means of anchor screws or bolts. A bottom channel runs between support posts just above the floor system.

5 The vertical space between the posts, the bottom channel and top rail is infilled with either glass panels or aluminum pickets. Figure 1 below illustrates the main elements of a glass panel and aluminum picket guardrail system. FIGURE 1: MAIN ELEMENTS OF GUARDRAIL SYSTEMS GENERAL Design This Manual has been compiled to provide relevant structural information which will enable designers, installers, architects, and engineers to select safe and code conforming guardrail designs using Alco Ventures Inc. products. The major considerations for the structural Design of guardrails are: Design criteria as established by governing building codes, bodies and authorities or byspecial established project Design requirements, properties of material used in manufacture of guardrail elements, properties of guardrail elements, capacities of guardrail elements and component systems, distribution characteristics of various guardrail elements and systems, anchorage of support elements to surrounding supporting Vista RAILINGS Design Manual Canadian .

6 /5 ALCO VENTURES INC. Design CRITERIA Loadings Structural Design loading requirements for guardrails are specified by governing building codes and bodies, local ordinances, project specifications and/or regulatory authorities. Usually a uniformly distributed load and/or concentrated load applied to the top rail is specified. The loading requirements of The National Building Code of Canada (NBCC) 2005 for guardrails are provided under clauses Loads on Guards 1) to 5). The clauses are repeated Loads on Guards 1)The minimum specified horizontal load applied inward or outward at the top of every requiredguard shall be a) kN/m ( plf) for means of egress in grandstands, stadia, bleachers and arenas,b)a concentrated load of kN (225 lbs.) applied at any point for access ways to equipmentplatforms, contiguous stairs and similar areas where the gathering of many people isimprobable andc) kN/m ( plf) or a concentrated load of kN (225 lbs.

7 Applied at any point,whichever governs, for locations other than those described in Clauses (a) and (b).2)Individual elements within the guard, including solid panels and pickets, shall be designed for a loadof kN ( lbs.) applied over an area of 100 mm (4") by 100 mm (4") located at any point in theelement or elements so as to produce the most critical )The loads required in Sentence (2) need not be considered to act simultaneously with the loadsprovided for in Sentences (1) and (4).4)The minimum specified load applied vertically at the top of every required guard shall be kN/m( plf) and need not be considered to act simultaneously with the horizontal load provided forin Sentence (1).5)For loads on handrails, refer to Sentence (9). Factors of Safety Factors of safety for a guardrail system can be a somewhat subjective decision to be determined by the designer or certifying professional.

8 Factors of safety are generally related to a mode of failure. Ductile failure, such as stable (no buckling) yielding of a metal element, is usually assigned a lower factor of safety than is brittle failure, such as screw fracture or anchor bolt pullout. Part 4 of the NBCC 2005 specifies a load factor of to be applied to live loads. Since it is unlikely that the failure of any one component will cause the entire system to fail, a factor of safety of for element and system Design would seem appropriate. A higher or lower factor of safety may be appropriate depending upon the type of application and other considerations made by the certifying professional. For instance, a higher factor of safety may be more appropriate for glass infill panels since their failure is of a brittle nature. The guardrail configurations/ Design tables provided at the end of this Manual have been developed using a minimum overall system factor of safety of BW Vista RAILINGS Design Manual Canadian .

9 /6 ALCO VENTURES INC. MATERIALS AND PROPERTIES Mechanical Properties Of Aluminum Alloys And Elements Mechanical properties of aluminum alloys used in Alco Ventures Inc. Guardrail Systems are provided in CAN3 S157 M83 Strength Design in Aluminum and are listed in Table 1 below. Properties var y with the composition and temper of the material and also, to some degree, with the profile and the direction of stress. Table 1: MECHANICAL PROPERTIES OF ALUMINUM ALLOYS AND PRODUCTS NOT WELDEDWELDED Alloy & products Tensile ultimate Fu Tensile yield Fy Compressive yield Fy Tensile ultimate Fwu Tensile yield Fwy Elastic modulus E Extrusions and drawn tube 6063 T5 150 MPa ( ksi) 110 MPa ( ksi) 70 000 MPa (10 000 ksi) 6063 T54 230 MPa ( ksi) 205 MPa ( ksi) 205 MPa ( ksi) 120 MPa ( ksi) 70 MPa ( ksi) 70 000 MPa (10 000 ksi) 6063 T6 205 MPa ( ksi) 170 MPa ( ksi) 170 MPa ( ksi) 120 MPa ( ksi) 70 MPa ( ksi) 70 000 MPa (10 000 ksi) Extrusions sheet, plate, and drawn tube 6061 T6 260 MPa ( ksi) 240 MPa ( ksi) 240 MPa ( ksi) 170 MPa ( ksi) 110 MPa ( ksi) 70 000 MPa (10 000 ksi) 6005A T61 262 MPa ( ksi) 241 MPa ( ksi) 241 MPa ( ksi) 70 000 MPa (10 000 ksi)

10 Physical Prop erties Of Guardrail Elements Physical properties of sections of commonly used elements in Alco's Guardrail Systems are given in Table 2. Typical cross sections of these elements are provided in Figure 2. Additional elements are show in Alco's Dealer Catalogue. BW Vista RAILINGS Design Manual Canadian ../7 ALCO VENTURES INC. TABLE 2: PHYSICAL PROPERTIES OF COMMON ELEMENTS ELEMENTS ALLOY AREA MM2 (IN2) lxx 106MM4 (IN4) Sxx 103mm4 (in3) lyy 106mm4 (in4) Syy 103mm4 (in3) TOP RAILS mm (2 ) round top rail for glass panel infill 6063 T5 469 (.727) .099 (.237) (.228) .171 (.412) .861 (.358) mm (2 ) square top rail for glass panel infill 6063 T5 507 (.785) .124 (.298) (.292) .218 (.523) (.454) mm (2 ) round top rail for picket infill 6063 T5 401 (.621) .099 (.238) (.226) .165 (.)


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