Aisc seismic design manual 2nd edition pdf download

Stringer Grating tread with checkered plate nosing bolted to stringer, typical Fig. Stringer with welded metal pan for treads and risers. Stringer with bolted grating treads. The masonry wall and beam Additional vertical bracing and utilization of a floor dia- pockets can then be built around the stair to provide perma- phragm may also be required to resist lateral loads. Another option is to use post-installed anchors with a steel 4.

Where stairways are supported by masonry A hanger-supported landing has similar framing to the post- core walls, coordination with the SER is critical because the supported landing but is connected by hangers to the support- stair connection details may require grouted cores, bond ing structure above.

Various hanger members can be used, beams or other details that must be designed and specified in such as square or rectangular HSS, angles, pipe, and cables the design documents. When using long hangers, cable or rod, additional lat- For concrete walls, landing framing can be supported by eral restraint should be provided to brace these elements and embed plates that are installed when casting the concrete ensure movement of the landing does not adversely affect wall.

Another option is to use post-installed anchors with a occupant comfort. Where stairways are supported by 4. Core walls are typically constructed from masonry or specified in the design documents. For masonry walls, landing framing can be sup- For both masonry walls and concrete walls, stairs may be ported using beam pockets that need to be coordinated with shipped in individual pieces and assembled in the field to the masonry contractor during construction.

Alternately, the account for tolerances in the walls. This will require more stair can be temporarily supported with erection bracing time and effort during erection. General stability requirements crete over metal deck. Plate Shear Walls Sabelli and Bruneau, , for guidance related to diaphragm design for stiffened plate. For lateral forces, one option for design is to Checkered plate flooring can be used as a diaphragm based assume that each stringer resists one-half of the lateral forces on principles provided in AISC Design Guide 20, Steel Plate through weak axis shear and bending.

Refer to Chapter 4 for Shear Walls. Alternatively, when using welded tread and riser construc- 5. With thinner light gage material for the treads and ris- As an alternative to a landing diaphragm, horizontal brac- ers, it may be difficult to satisfy local buckling requirements. This requires that a load path for Using thicker checkered plate, however, may allow for this lateral forces from the landing or stair assembly be provided type of analysis.

If risers are omitted, it may be possible to back to the building structure for support. Table provides design the assembly as a horizontal Vierendeel truss. This is typically possible when 5. Using plate stringers cally for stairway design, bracing is designed using cable, requires careful analysis, design and detailing to ensure that rod, single angle or plate.

Improperly designed landings can number of connections and braces needed. Typical options create discontinuities in the stair with respect to resisting lat- include HSS members, single angle, double angle and pipe.

Creating a diaphragm at stair landings can pro- Follow the AISC Specification for slenderness limits and to vide an additional load path for resisting the lateral forces. The AISC Specification should cast-in-place concrete over metal deck that is supported by be used to determine available strength. When using HSS the landing steel framing.

Larger landings may require moment connections. Using typical steel- AISC standard shear connections are detailed in AISC framed connections can simplify the design process, make Manual Part 10; they include double-angle connections, detailing and fabrication easier, and ensure the stairway shear end-plate connections, unstiffened seated connec- members are erectable in the field.

Refer to the Purpose sec- tions, stiffened seated connections, single-plate connections, tion of this Design Guide in regard to connection adjustabil- single-angle connections, and tee connections.

For stairways ity and coordination of structural supports to avoid common designed as simple-span beams with only a shear end reac- issues that arise as part of the stairway design. Refer to AISC Manual Part 10 for additional guid- Connecting the steel stair elements can be accomplished in ance and design requirements for each type of shear con- a variety of ways including embed plates, beam pockets, or nection.

Figures and are, respectively, examples of post-installed anchors. Single-plate connections using the extended configura- support structures should utilize standard connections from tion can be used when adjustment is needed when connecting the AISC Manual AISC, to the largest extent pos- to existing structures or to provide additional flexibility dur- sible.

Such connections include simple shear connections, ing construction. Figure shows the use of an extended axial connections, moment connections, bracing connec- plate connection with slotted holes. Using standard AISC connec- tions provides familiar details for engineers, steel detailers, 6. The specific type of connection Axial tension connections are typically found when using used at a given location will depend on the design criteria hangers to support landing framing.

However, other stairway for the stairway. An example occurs when a strut is used as part of a cator and erector to select stairway connections that conform stairway to transmit lateral forces to the supporting structure to the design requirements and provide the most economical and lateral force-resisting system.

Double-angle connec- and erectable option. Stair stringer with single-plate connection. Stair stringer with single-angle connection. Figure shows additional guidance for the design of hanger connections. The use of bolted flange plates or bolted end- port the cantilever portion of suspended slabs and wall con- plate moment connections avoids field welding and helps struction. The connection layout at this location dictates to minimize field installation costs. Welded flange plates or the overall stairway opening size.

These details require directly welded flanges are alternative options that can be careful consideration and coordination to ensure that stair used as well. Figure shows a slab edge angle detail with built- stair or landing cantilever past a support. Moment connec- in adjustment based on the stairway layout. Providing some tions can be provided to allow the stair member to pass adjustment during detailing will help to ensure that the stair- through the support as shown in Figure Alternatively, it way fits properly within the detailed opening.

Additionally, may be simpler to allow the stair member to be a continuous the slab edge angle or bent plate can be sent to the field as a member that passes over the top of the support member as loose piece to be field welded once the opening size and stair shown in Figure Moment frames may be used as the lateral force-resisting At the uppermost stair landing, a guard is provided to system for stairs with wind or seismic loads. Moment con- enclose the flat portion of this area.

The support and attach- nections will be needed in these structural systems. Shop- ment for the guard can vary depending on the member type welded assemblies or field-bolted connections are preferred, and end connection layout where the stair stringer meets the but project requirements will vary. Slab 6. Connections will vary based on the bracing members and Partition wall WF beam design forces. Stair stringer with single-plate connection using extended configuration.

Stair beam with hanger to support beam. Support beam Stringer Support beam Fig. Stair stringer with through-beam moment connection.

Stair stringer continuous over support beam. Stair landing single-angle brace connection. Slab edge detail at stair opening. Guard to side of slab edge.

Guard to top of support beam. In some geometry and joined with a CJP weld. It should be noted that cases, aesthetic members are added that match the stringer to the vertical neutral axis of a channel member does not coin- provide continuity in this area.

At the kinked junction, a force perpendicular to the sloping member must 6. In many cases, this force is relatively In many cases, stairways are installed after other construc- small, and the thick sloping channel flanges will provide tion steel, concrete, masonry, etc.

Designers should coordinate with the fabricator and erector When wide-flange beams are used as stringers, a CJP to provide connection details that allow for ease of erection weld can be used at the flanges and web. Additional stiff- and provide adjustment in the field.

Flange can allow for quick and easy erection of stair flights. Fig- bending should be checked to determine the need for these ure provides an example of one style of erection aid. Refer to Figure for a typical This detail allows the erector to quickly set the stair flight detail.

The final connection may require field bolting or field welding that will be completed 6. Figure shows tural members, coordination of different trades, and field the layout of a kinked channel or HSS stringer. Plate string- modifications. The need for backer bars should be carefully considered as the 6.

Channel stringers can be laid out to match the required For cast-in-place concrete construction, embedded plates are installed before the concrete is poured. Embedded plates should be provided with adjustability in mind so that con- necting elements can be shifted in the field. Stair flight with erection aid.

Kinked channel stringer or HSS stringer. Figure shows a typical beam pocket be field welded to the embedded plate to support the steel connection to a masonry wall. The design of the embedded stairway framing. Figure shows a typical connection plate and associated anchorage should be designed per ACI to a concrete wall using an embedded plate. Anchors attached to the face to allow for beam pockets. Beam pockets should leave ade- of hollow ungrouted masonry walls should be avoided quate space for installation of the steel member and access as anchor capacity is very limited.

In these cases, the only for connection to anchor rods or field welding to a base option available is to use post-installed anchors to support plate. Depending on the layout of beam pockets, the steel connection plates. Kinked wide-flange stringer. Stair beam to embed-plate connection. Stair beam connection to masonry wall pocket. Refer to Figure for ity with the supporting structural wall or slab, and approval a stringer base detail at a thickened concrete slab.

Installa- by the appropriate authority. Figure shows a single- tion of anchors under the stair pan can be achieved by leav- angle connection using post-installed mechanical anchors to ing access holes in the pan or having the pan field installed a grouted masonry wall.

Post-installed anchors come in many varieties, sizes, materials, finishes and applicable uses. Designers should 6. The Evaluation reports and associated testing are also available following examples provide conceptual connection details for most anchors.

Fig- ures and use sliding connections with oversize 6. Figure also uses a sliding connection but design checks based on the appropriate codes. Require- incorporates an expansion joint and expansion cover plate.

Stair beam single-angle connection using post-installed anchors. Stringer base at thickened slab. Seismic displacement detail using sliding connection at concrete slab on grade. Seismic displacement detail using sliding connection at concrete slab on deck. Seismic displacement detail using expansion joint.

Round stair occupants. Guards are provided along open sides of a HSS members come in similar sizes and wall thicknesses stairway and open sides of landings and platforms. Guards to pipe but are available with the higher yield stress. Many may also be provided under sloping stairs or other areas with times, ASTM A members are available as dual certified, low overhead clearance to prevent occupants from colliding meaning that the member will meet the requirements of either with low overhead structure.

Handrails provide a gripping Grade B or Grade C specifications. ASTM A members surface to assist occupants as they travel up or down a stair. Stairways and asso- A material providing larger section properties than ciated landings use different styles of guards and handrails ASTM A for the same size member. Designers should depending on the stair type and class. Some infor- 7. They are more frequently used with commentary pertaining to steel guards and handrails. Guard and handrail members can vary substantially based on the stair type and class.

Architectural considerations are also 7. Single-angle members are often used for guards along plat- In these instances, the guards and handrails must serve their forms and attached to stairways in industrial settings. The intended safety purpose and provide the required structural construction and attachment of single-angle guards allows strength in addition to satisfying the aesthetic requirements. Care should be taken when using angle members as a top rail and integrated handrail 7.

Typical member sizes are in. Solid plate, bar or rod can be used as guards and handrail in Other sizes and grades of steel round members are available certain applications. The ability to cut specific geometry into but are not standard AISC shapes. Pipe is referenced by its plate allows for flexibility in architectural design.

Solid steel nominal dimension and is available in three different wall members may be heavier than other alternatives but may be thickness categories: Standard Weight Std. Pipe is demands. A variety of nonsteel materials are commonly used exclu- Round HSS members are usually the ideal member option sively or combined with steel elements for guards and hand- when used for round rails due to improved strength charac- rail. In many cases, wood members will be combined with teristics.

ASTM may all be used in certain instances. Spacing of the bottom rail must conform to the applicable code and occu- The guard consists of the following elements: top rail, bot- pancy to ensure the resultant openings are within allowable tom rail, post and infill and may also include handrail for sizes. Refer to Figures and for the typical layout for an IBC-style guard. Refer to 7. Each of these elements is treated differently for design The post provides a support for the top rail, bottom rail, infill and serves a specific purpose as part of the guard system.

It also provides resistance for vertical, lateral and axial forces. The post must have adequate strength and 7. The post is typically connected to the top or side of stair stringers or The top rail defines the uppermost portion of the guard.

Refer to the applicable project code to determine the height at which to set the top rail of the guard above the walking 7. The top rail must have the strength and stiffness to span from support point-to-support point typically posts The infill is bounded by the top rail, bottom rail and posts for vertical, lateral and axial loads. Infill can be provided using 7. Spacing of infill members must conform to The bottom rail defines the lower portion of the guard, typi- the applicable code and occupancy requirements to ensure cally leaving an opening from the underside of the bottom openings are within allowable sizes.

Typically, for an IBC- rail to the landing or stair stringer. Design checks for the bot- compliant stair, openings do not allow for passage of a 4-in.

IBC-style guard, elevation view. IBC-style stairway guard, section view. OSHA-style guard, elevation view. Toe plate should be provided est dimension. Consideration should also be made to the layout of infill Commercial stairs may not need toe plate in an occupancy members to avoid creating a ladder effect.

The ladder effect where there is minimal risk of objects falling i. Designers should verify the need for toe plate allows an occupant most likely young children to climb with the architect. Alternatively, some stairway and guard the infill members. It is the responsibility of the architect to designs will adjust the top of steel of the support member, determine when the ladder effect could pose a concern based shifting the top of steel above the finished floor, to act as the on the project type and occupancy.

The handrail may be based on the members being used. Most often steel guard supported from the guard or wall mounted. Refer to the and handrail assemblies are shop welded to the largest ship- applicable project code to determine the height range at pable size and then field welded or bolted to the stair stringer which to set the handrail above the walking surface and or other supporting structure. The applicable code will also provide graspability requirements that dictate the 7.

The handrail must have the Steel members comprising the sloping or horizontal rails, strength and stiffness to span from support point-to-support vertical posts and infill pickets can be joined by welding. Fil- point for vertical, lateral and axial forces. Finishing of these welds is also impor- 7.

OSHA-style stairway guard, section view. This ASTM standard provides Support brackets for handrail can be fabricated from steel the specifications for testing of a guard and handrail system bar or rod and can also be purchased from a manufacturer. Designers should verify that the bracket and its fasteners are When using pipe for the post, fillet welds are the easiest adequate to support the loads imposed on handrails, account- and most common option for connecting to the top flange of ing for both vertical and lateral forces.

When space is limited, a one-sided complete- Support brackets purchased from manufacturers should joint-penetration CJP square groove weld in a butt joint come with testing documentation showing that the brackets configuration can also be used.

Other appropriate As noted previously, the applied moment at the top of the testing to verify the brackets meet the load and deflection stringer should be considered by the designer. For channel requirements of the code may also be acceptable. Note that stringers, additional checks should be made to determine if at the time of writing, ASTM E has been withdrawn.

The post may be mounted to stringer for the imposed moment from a guard post. The for- the face of a plate stringer or HSS member, as shown in Fig- mula utilizes a 2.

Alternately, the post may be mounted to the top of width of the resisting element. Fillet steel pieces as more common. Designers should carefully select a post size stiffeners. Guard post mounted to side of HSS member. Guard post mounted to top of channel. Refer to the previous the post to the channel to resist the applied moment. A more section for general information regarding handrail support detailed analysis or alternative methods may show that the brackets. The use of approved, post-installed screw anchors stiffener is not required.

Engineering judgment should be is typical for attachment to concrete or masonry walls. Designers should ensure that additional blocking or sup- Posts may be set into concrete slabs and floor systems in port members are provided within wood or metal stud walls core-drilled holes filled with grout. This can be an effective that can provide adequate resistance to the required loads.

Fasteners crete edges. The development length equation according to ACI is Hex bolts with forged heads are also commonly used as headed anchor bolts. Scribd member for your billing information is designed to undo. Id or 4" min. Bolts welds column base Eurocodes.

Determinations concerning fitness for purpose and particular matters or application of the Practice to particular project or engineering situations should not be made solely on information contained in these A spreadsheet table used to specify pedestal parameters and anchor bolt layouts, if these are present for a support. Open navigation menu , AM. Among the strong features of spreadsheets are their instinctive cell-based structure and easy to use capabilities.

Touch device users can explore by touch or with swipe Anchor bolt design spreadsheet xls in Description. Description of the bolt for your reference. Load Example. Analysis of Pile Groups with Rigid Caps. The bearings are attached to the girder; by field welding or bolting. Mx -Q-Torsion Design. The self-drilling anchor attaches to a roto-hammer, which is used to drill the proper size hole. Bolt design per the NDS is not just a matter of selecting a design value from a table.

ACI Chapter 9. Filters Suggested Categories. Stiffness, so we. These design rules were recently incorporated into the International Building Code. The Structural Committee. Connection Calculator available for the iPhone. Picture 2 - Pump baseplate with an anchor bolt shown on the left side and a levelling screw on th right side a steel washer is installed between levelling screw The design is based on the reinforcement attaining the yield stress, so the reinforcement must be properly bonded to the concrete for a finite length in order not to slip.

Moment connection design spreadsheet spreadsheet anchor bolt design spreadsheet is eliminated at the base plate to help the. The website is both default setting up your ad preferences anytime, styles give easy for cannot be.

This video demonstrates the anchor bolt design within Tedds. Arkan J. Salva Salva Espectro Asce per dopo. McAllister, M. ASCE 7 i. Translate PDF. For the IRC, even though ASCE will be shown as the referenced load standard, most changes to the actual code language relating to the new standard were denied.

All books are in clear copy here, and all files are secure so don't worry about it. Ships from and sold by Amazon. Descargar ahora. Uploaded By saljashamy The series will cover the basics of wind engineering including the atmospheric and aerodynamic effects of wind on buildings. Pdf Asce 7 16 Free. These de-sign criteria adopt by reference many industry standards and specifi cations that have been created in accordance with rigorous American National Standards Institute ANSI procedures.

O'Rourke, Michael, Ph. How They Affect the Practicing Engineer. The is due to the year it was pro-mulgated. ASCE describes the means for determining design loads including dead, live, soil, flood, tsunami, snow, rain, atmospheric ice, earthquake, wind, and A Location Key Plan for each state identifies specific areas that have PDF maps; these Location Key Plans correlate to Figures C6.

Covering guyed and self-supporting structures, these requirements are applicable to hot-rolled and cold-formed steel shapes.

Subscription-based, concurrent user license. The 0. Username: [email protected] 1a and 1. Close suggestions Search Search. Best Scribd downloader! Download Scribd documents for free and easy. Note Set Note SetWe would like to show you a description here but the site won't allow us.

Just input an url, we will give you the download that we found on the internet. All components shall be assigned a component importance factor as indicated in this section. Refer to Table 6. Gear box 5. European design rules Eurocode 2 for reinforced concrete structures.

Tank shell 2 Plate 3. Material Models The stress—strain relation for the design of concrete material in the Eurocodes [16] is adopted as shown in Figure 2. The ultimate and design Structural capacity can be calculated as: The design is based on the reinforcement attaining the yield stress, so the reinforcement must be properly bonded to the concrete for a finite length in order not to slip.

Steel Connection Designer Base Plate 4. Design of Column Base Plates Typical column bases, as shown below, consist of a single plate fillet welded to the end of the column and attached to the foundation with four holding down bolts. Black bolts have adequate strength and ductility when used properly; but while tightening theAnchor bolts for tension and shearing forces, and their chair 1. Bolt connection design example eurocode Reinforced concrete design to Eurocode 2.

Eurocodes - Design of steel buildings with worked examples. At Hilti, we work hard to help build a better world. Details design considerations based on the requirements of Eurocode 2, for holding down bolts that are used to attach steel or precast concrete stanchions to reinforced or un-reinforced concrete foundations. The design ultimate shear load should not exceed the design slip resistance, obtained from 3. The geometric effect of spacing of anchors p and edge distance e is included in the area of the cone, see Figure 7.

The following image shows several examples of anchors for horizontal text. Within the Eurocodes, formulas to predict the design resistance of a T-stub flange with two bolts per row are given for each failure mode; the latter have been extended to T-stub configurations with four bolts per row see Figure 3 in [3] and are reported in Table 1.

Some design rules for the column shoe connections only reflect the properties of the anchor bolt. Downloaded: x. Anchor Bolts. Therefore, ACI provisions for anchor design can be capacity of anchor bolts in tension 52 Properties of Concrete [useful information] Design to EC3. These design strengths are checked against calculated factored loads acting on anchors.

Concrete breakout. Eurocode 2 worked examples Eurocodes. Civil Engineering Design Resources. For the example shown in Fig. Bolt connection design example eurocode. Beeby, prof H. T i ill i l d ti d iTopics will include connection design philosophy and behavior, an overview of NDS provisions related to bolt design including Appendix E for local stresses in fastener groups, and a Anchor bolt design example eurocode Anchor bolt design example eurocode.

Select anchor bolt design code. This sufficient length to anchor bars near the end of connections is referred to as the development length, l d. If you click button consent to the processing of personal data.