Modular Pipe Supports, Rev 1

8/19/2019 Modular Pipe Supports, Rev 1

1/17

Rev 1, 21May2015

Modular Pipe Support Systems


2/17

Modular Pipe Support System Standard

Rev 1, 21May2015

Table of Contents

1.0 Introduction ......................................................................................................................................................... 3 2.0 Background ......................................................................................................................................................... 3 3.0 Modular System Components ............................................................................................................................. 3 4.0 Modular Support Standards ................................................................................................................................ 4

4.1 Maximum Load Determination .................................................................................................................. 4 4.2 Loading Conditions .................................................................................................................................... 5 4.3 Loading Charts ........................................................................................................................................... 6 4.4 Loadings Outside of Standard Conditions ................................................................................................. 6

5.0 Implementation ................................................................................................................................................... 6 6.0 Attachments ........................................................................................................................................................ 7

6.1 Standard Pipe Support Details ................................................................................................................... 7

Prepared By:Sayle [email protected] 864-281-4306

mailto:[email protected]:[email protected]:[email protected]


3/17


Rev 1, 21May2015

1.0 Introduction

Modular pipe support systems are a pipe support system created from prefabricatedmodular components that can be field fabricated and assembled into a variety of piping,

electrical and utility supports. Two examples of this are Hilti´s MI and Sikla´s Framomodular support systems. These support systems can be assembled into a variety ofconfigurations similar to the standard ‘SPS’ Supports used on Fluor projects and can provide a cost-effective alternative to the SPS Supports that are typically shop fabricatedfrom structural shapes. In order for these support systems to be effectively implemented,a system of standard details, drawings and load tables similar to the Fluor SPS Supportstandards must be developed.

2.0 Background

The Fluor SPS Support standards are a catalog of supportconfigurations with pre-designed steel shapes for givenconfigurations and support dimensions as shown in the figure onthe right. Rather than engineer individual supports, the SPSstandards are ‘pre-engineered’ and provide the maximumallowable loading for given dimensions and noted criteria. Thesemaximum allowable loads are based on the structural limit statefor each configuration and span. The standards are completed bythe originating discipline requesting the support, are verified bystructural engineering and are formally issued as a controlled project document.

3.0 Modular System Components

These modular support systems offer modular framing components and connections thatcan be field fabricated and assembled into a complete utility support. These componentsdo not have the capacity of structural steel shapes and fabricated connections but do haveadequate capacity for light to moderate supports.

The modular framing components can be field cut to required lengths and assembled intothe desired support configuration using pre-fabricated connectors. The pre-fabricatedconnectors support connecting modular framing components to each other, to structuralsteel, concrete walls and concrete floors/foundations.


4/17


Rev 1, 21May2015

4.0 Modular Support Standards

4.1 Maximum Load Determination

The maximum allowable load for each standard support configuration and for

varying spans should be determined. The maximum allowable load should bedetermined considering the limit state of the various components used in theassembly of each support configuration.

Case I Trapeze hanger with moment connections of the girder tothe hangers. The connection of the hangers to thesupporting member parallel to the supporting member isconsidered as a moment connection. The hangerconnections perpendicular to the supporting member areconsidered as ‘pinned connections’. Determine themaximum allowable load considering the combinedforces on the beam and hanger, connection of beam tohanger and connection of hanger to supporting member .

Modular Components (Hilti MI / Sikla Framo)• Beam and Hanger (MI-90 & MI-120 / F80 & F 100)

• Connection of beam and hanger (MIC-90-L-AP / STA F80)

• Connection of hanger to supporting member (MIC-SC90 & MIC–SC120/ WBD F80)

Case II Trapeze hanger with moment connections of the girder tothe hangers. The connection of the hangers to thesupporting members parallel to the supporting member isconsidered as a moment connection. The hangerconnections perpendicular to the supporting members areconsidered as ‘pinned connections’. Determine themaximum allowable load considering the combinedforces on the beam and hanger, connection of beam tohanger and connection of hanger to supporting member.

Modular Components (Hilti MI / Sikla Framo)• Beam and Hanger (MI-90 & MI-120 / F80 & F 100)

• Connection of beam and hanger (MIC-90-L-AP / STA F80)

• Connection of hanger to supporting member (MIC-SC90 & MIC–SC120/ WBD F80)

Case III Knee-braced support with pinned connections to thesupporting member and brace to beam. Determinethemaximum allowable load for a point load placed at thecenter of the beam or at the end of the beam consideringthe combined forces on the beam, axial force in brace,connection of beam to brace and connection of brace tosupporting member.

Modular Components (Hilti MI / Sikla Framo)

• Beam and brace (MI-90 & MI-120 / F80 & F 100)

•

Connection of beam to brace (MIC-U-MA / GK F80)• Connection of brace and beam to supporting member (MIC-SA-MA, MIC-SB-MA &

MIC-SC-MA/ GK F80 GPL)


5/17


Rev 1, 21May2015

Case IV T-post support hanger with moment connections of the post to the beam and post to the base. Determine themaximum allowable load placed at 6” from the postcenter considering the combined bending on the beam, bending, axial and torsion on the post, connection of beam to post and connection of post to base. Additionalcalculations should consider “Concrete connector-welded bracket”.

Modular Components (Hilti MI / Sikla Framo)

• Beam (MI-90 & MI-120 / F80 & F 100)

• Post (MI-90 & MI-120 / F80 & F 100)

• Connection of beam to post (MIC-90-L-AP / STA F80)

• Connection of post to concrete (MIC-C90-D and MIC-C120-D / WBD F 80–80/120

For Support Conditions such as Case I or Case II described above, the supporting members may

have minimal capacity for moments perpendicular to the member which would cause rotation of

the bottom flange or torsion on the member. In such cases, the weak axis moment capacity should

be neglected through a ‘pinned connection’.

4.2 Loading Conditions

The maximum allowable load for each standard support configuration and forvarying spans should be determined. The maximum allowable load shouldconsider conditions of:

• Load located at the center of the span producing the maximum moment on thehorizontal support and hanger.

• Load located at the edge of the span adjacent to the hanger producing themaximum axial force on the hanger and maximum shear on the connection.

In addition to the concentrated vertical load located at the above locations thefollowing horizontal loads should be considered as acting concurrently with the

vertical load:• Lateral load of 30% of the concentrated load acting parallel to the span.

(In plane lateral loads)

• Friction force of 15% acting perpendicular to the span. Additional bracingwill be provided by the engineer to resist the out of plane forces.

The horizontal loads do not act concurrently but as independent combinationswith the vertical load.


6/17


Rev 1, 21May2015

4.3 Loading Charts

Loading Charts should be provided for each support case. Loading charts shouldconsider hanger lengths as well as span lengths. A typical loading chart might beas presented below:

4.4 Loadings Outside of Standard Conditions

For projects located in areas with seismic or other design considerationsexceeding the established standard loading conditions, specialized loading chartswould be required or supports would need to be designed on an individual basis.This would necessarily reduce the efficiency of the standard support details butmight provide an otherwise cost effective solution to expensive fabricatedstructural steel supports.

5.0 Implementation

With multiple suppliers of modular components having different framing componentsand connections, the standards provided by each supplier will be different both incomponents and load capacities. To take maximum advantage of the standards andreduce rework, projects should make a decision on which supplier’s standards to useearly in the project. This should occur before any pipe or utility supports are designed.This early decision might require an early bulk material bid solicited from the suppliers inorder to determine the cost effective solution for the project. The project could then issue

7 7

5

4

3.32.8

4.9 4.9

3.5

2.82.31

1.96

0

1

2

3

4

5

6

7

8

0 2 4 6 8

V e r t i c a l L o a d

Support Span

Hanger = 2'-6" (max)

Hanger = 4'-0" (max)


7/17


Rev 1, 21May2015

the chosen supplier’s standards as pipe and/or utility support templates for the requestingdiscipline’s use.

6.0 Attachments

6.1 Standard Pipe Support Details

• X-STD-5SPS1-SK-S




• X-STD-5SPS4A-SK-S

• X-STD-5SPS4B-SK-S



• X-STD-5SPS8A-SK-S


8/17


9/17


10/17


11/17


12/17


13/17


14/17


15/17

X-STD-5SPS6-SK-S


16/17


17/17

Documents

Modular Pipe Supports, Rev 1