See: Concrete beam and column groups , Steel member design groups

See: Inactive members

• Steel
• Concrete
• Timber
• General
• Cold formed
• Cold rolled

Construction,

Fabrication

See: Concrete member autodesign, Steel member autodesign

(steel only)

(concrete only)

This option controls the starting point for auto-design procedures and is therefore only displayed if Automatic design is ‘on’. It applies to both longitudinal bars and links.

• Minima (default) - removes the current arrangement and begins with the minimum allowed bar size.

• Current - the auto design commences from the current bar arrangement.

See: Concrete member autodesign, Steel member autodesign

• On = designed for gravity combinations only
• Off = designed for gravity and lateral combinations

See: Designing individual members for gravity only

Rotation

The default (Degrees0) aligns the major properties with the global Z axis, (provided that the member has not been specifically defined within an incline plane).

end 2

Can be used to model a physical offset with respect to the global axes at one or both ends of the member, (exceptions apply).

See: Member global offsets

Minor snap level

(not concrete)

Minor offset

(not concrete)

end 2

(concrete only)

Grade/Class

• Straight
• Curved Major
• Curved Minor

See: Analysis Model settings

(steel and composite beams only)

Minor snap level,

Minor offset

end 2

When this checkbox is selected - defines a cantilever end.

end 2

• Moment
• Pin
• Fully fixed

See: Beam end releases and partial fixity

end 2

end 2

• Fixed (default)
• Spring linear
• Partially fixed

When ‘My stiffness’ is set to Spring linear, this property allows you to specify the major direction stiffness in terms of a linear spring value.

When ‘My stiffness’ is set to Partially fixed, this property allows you to specify the major direction stiffness as a percentage of a fully fixed connection. (% of 4EI/L).

• Fixed (default)
• Spring linear
• Partially fixed

When ‘Mz stiffness’ is set to Spring linear, this property allows you to specify the minor direction stiffness in terms of a linear spring value.

When ‘Mz stiffness’ is set to Partially fixed, this property allows you to specify the minor direction stiffness as a percentage of a fully fixed connection. (% of 4EI/L).

Select this flag if you want open structure wind loads to be calculated.

See: Open structure wind loads

KLL

(Head Code ACI/AISC)

Specify the KLL factor in accordance with Table 4-2 in ASCE 7-05/ASCE 7-10.

See: Overview of live or imposed load reductions

(All other Head Codes)

This property is particularly applicable to the design of transfer beams.

Although the percentage of imposed load reduction is not determined automatically for beams, this property allows you to specify the percentage manually.

The reduced results are used in concrete beam design.

See: Overview of live or imposed load reductions

Apply span\factor

Limit for total deflection affecting sensitive finishes

Calculate total deflection at design time

Calculate deflection after installation of finishes

Apply rotational limit

See: Torsion

See: Camber

For composite beams this is fixed to on (for EC and BS head codes only). For non-composite beams it can be used in conjunction with the 'Calculate natural frequency' property to impose an optional 2-step control, ‘calculate’ and ‘check’, which allows for the natural frequency value to be calculated (and displayed in Results Viewer) with or without the check. While the US head code has no requirement for this check, it can still be requested if required.

When performed, a simple (design model) approach is taken based on uniform loading and pin supports. This fairly simple calculation is provided to the designer for information only. The calculation can be too coarse particularly for long span beams and does not consider the response side of the behavior i.e. the reaction of the building occupants to any particular limiting value for the floor system under consideration. In such cases the designer has the option to perform a 1st Order Modal Analysis.

See:

• Natural frequency checks (SLS) (Beams: EC4 Eurocode)
• Natural frequency checks (SLS) (Beams: BS 5950)

Include self weight (beam & slab)

Include other dead loads

Include live loads (US)

Include imposed loads (other head codes)

Effective width

Calculate effective width

For composite beams the effective width can either be entered directly or calculated from the geometry.

See:

• Effective width used in the design - Head Code: ACI/AISC
• Effective width used in the design - Head Code: Eurocode
• Effective width used in the design - Head Code: BS

Min depth,

Max width,

Min width

See: Size constraints

Max span/depth ratio

The setting can also be reviewed and/ or copied via Review View > Show/Alter State.

See: Size constraints

See: Instability factor

Any beam that supports or is attached to partitions or other constructions likely be damaged by large deflections should be identified as such by selecting this property.

Select in order to consider flanges in the concrete beam design calculations - once checked additional fields are displayed for specifying an allowance for openings.

Flange dimensions can only be calculated by editing the beam once it has been positioned and slabs have been defined. (In this case a ‘Calculate flanges’ button is also displayed, this can be clicked in order to automatically calculate the flange dimensions based on the adjoining slabs.)

See: Flanged concrete beams

Select this checkbox to use flanged beam properties when the analysis is performed.

See: Flanged concrete beams

Select this checkbox in order to apply ACI 318 clause 8.12.4.

When the check is performed, if the flange geometry does not meet the requirements the flanges are ignored.

See: Flanged concrete beams

If you clear this checkbox the flange depth and the effective flange width are determined automatically.

If you select the checkbox, two new properties are displayed for defining ‘Flange width’ and ‘Flange depth’.

See: Flanged concrete beams

Assuming concrete sections are cracked has a direct affect on the analysis; smaller Modification Factors are applied to cracked sections causing an increase in deflection. Indirectly the design can also be affected because the sway/drift sensitivity calculations are also influenced by this assumption.

See: Cracked, partially cracked, and uncracked concrete members

Nominal cover beam top edge,

bottom edge,

section side,

beam ends

If this is the case, select the checkbox, and then specify the SFRS direction and type.

• When an Autodesign is performed, the design will be incremented to achieve a utilization ratio less than the ratio limit.

• When an Autodesign is performed, the design will be incremented to achieve a utilization ratio less than 1.0.

See: Apply user defined utilization ratios

• When a Check is performed, the check will pass provided the utilization ratio is less than the ratio limit.

• When a Check is performed, the check will pass provided the utilization ratio is less than 1.0.

See: Fire check (Eurocode only)

• When members are set as 'Protected', self-weight of the members is increased by the weight of fireproofing.

  See: Fire proofing

• If 'Check for fire resistance' is also selected, the check is performed using the 'protected' time interval for critical temperature iteration, as specified in Design Settings

• If 'Check for fire resistance' is also selected, the check is performed using the 'unprotected' time interval for critical temperature iteration, as specified in Design Settings

Name

Finish

Class

Phase

Note

File

A customizable list of the attributes that can be applied to individual members and panels.

See: Create and manage user-defined attributes

Bottom longitudinal bar pattern

See: Concrete beam design fundamentals

In a multi-span beam properties can be entered for a specific span, over-riding those defined at the All spans level.