Seismic Series -
Extreme Movement-Floor, Wall & Roof

Seismic Systems Series

Floor, Wall, Ceiling & Roof Expansion Joint Covers in Stainless Steel & Aluminium

The Latham Seismic Systems Series expansion joint covers, are designed to accommodate extreme movement that occurs during seismic activity and earthquakes. They are also commonly used in modern hi-rise structures, that experience excessive movement during very high winds like typhoons, hurricanes and cyclones. These structures are usually isolated from the ground by base isolators and are designed to move during these occurrences. Generally structural joint widths designed to accommodate seismic activity are much wider than normal expansion joints in buildings. The theory behind this is that the slabs of the structure can move large amounts without bashing into each other causing structural damage to the building. The Latham range of Seismic Expansion Joint Covers are designed to accommodate this potential movement, with little or no damage to the expansion joint covers, meaning the structure in relation to the expansion joint covers will be damage free and functioning normally after a seismic or high wind event.

It should be noted that all of the Latham ranges of mechanical expansion joint covers will accommodate some seismic movement, particularly when the structure is designed with wide joint width to accommodate this potential movement. Although standard ranges of expansion joint covers may require some maintenance and repair after seismic activity occurs. In some cases designers and owners of the buildings feel it may be better to put in a system that will deal with the movement and require some repair after a seismic incident, as this generally reduces the width of the expansion joint cover required. Discuss these options further with your Latham representative.

When it is necessary to install a Seismic Expansion Joint Cover, Latham Seismic Systems offer the best option to deal with the movement. All of the systems can be custom made to suit different joint widths and allow different amounts of movement to best suit the design criteria for the structure.

Product Specifications   How to Specify Guide

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Illustrated: EXSSM-100
Stainless Steel Code A B C D Movement Total Available Movement Overall Depth Cover Plate Thickness
All dimensions in millimetres. All mechanical expansion joint fixings by others.
EXSSM-100 100 230 250 49 +100/-90mm 190mm 27mm 4mm
EXSSM-150 150 280 350 49 +150/-140mm 290mm 28mm 5mm
EXSSM-200 200 330 450 49 +200/-190mm 390mm 29mm 6mm
EXSSM-250 250 380 550 49 +250/-240mm 490mm 29mm 6mm
EXSSM-300 300 430 650 49 +300/-290mm 590mm 31mm 8mm
EXSSM-400 400 530 850 49 +400/-390mm 790mm 31mm 8mm
 EXSSM-500 500 630 1050 49 +500/-490mm 990mm 33mm 10mm
EXSSM-600 600  730 1250  49 +600/-590mm 1190mm 33mm 10mm
6 Way Movement
Indoor
Outdoor
Water Gutter
Fire Barrier
Seismic

 

The Latham Seismic EXSSM Seismic Series floor expansion joint covers are designed to accommodate normal thermal movement as well as seismic movement. The series is designed to be surface mounted and can accommodate the Latham Fire Barrier System.

The Latham Seismic EXSSM floor expansion joint covers are designed for normal pedestrian applications such as office buildings, hotels, foyers, shopping centres and airports etc, where seismic movement is a real possibility and the joints are required to perform after seismic movement has occurred.

These joint covers can be used in conjunction with many floor finishes such as tile, timber, concrete, vinyl, direct stick carpet and carpet tiles, epoxy floors etc. It is recommend that the EXSSM series of expansion joint covers be mechanically fixed and also fixed in place using Latham Thixotropic Epoxy Adhesive. The systems offer various movements in 6 directions. The joint covers can be custom manufactured to suit joint widths and movement requirements of the structure. Contact your Latham Australia representative to discuss your projects exact requirements.


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Illustrated: EXSLSM-100
Stainless Steel Code A B C D Movement Total Available Movement Overall Depth Cover Plate Thickness
All dimensions in millimetres. All mechanical expansion joint fixings by others.
EXSLSM-100 100 165 225 49 +100/-85mm 185mm 27mm 4mm
EXSLSM-150 150 215 325 49 +150/-135mm 285mm 28mm 5mm
EXSLSM-200 200 265 425 49 +200/-185mm 385mm 29mm 6mm
EXSLSM-250 250 315 525 49 +250/-235mm 485mm 29mm 6mm
EXSLSM-300 300 365 625 49 +300/-285mm 585mm 31mm 8mm
EXSLSM-400  400 465 825  49  +400/-385mm 785mm 31mm 8mm
 EXSLSM-500 500 565 1025  49 +500/-485mm 985mm 33mm 10mm
 EXSLSM-600 600 665 1225  49 +600/-585mm 1185mm 33mm 10mm
6 Way Movement
Indoor
Outdoor
Fire Barrier
Seismic

 

The Latham Seismic EXSLSM Seismic Series floor-to-wall expansion joint covers are designed to accommodate normal thermal movement as well as seismic movement. The series is designed to be surface mounted and can accommodate the Latham Fire Barrier System.

The Latham Seismic EXSLSM floor-to-wall expansion joint covers are designed for normal pedestrian applications such as office buildings, hotels, foyers, shopping centres and airports etc, where seismic movement is a real possibility and the joints are required to perform after seismic movement has occurred.

These joint covers can be used in conjunction with many floor finishes such as tile, timber, concrete, vinyl, direct stick carpet and carpet tiles, epoxy floors etc. It is recommend that the EXSLSM series of expansion joint covers be mechanically fixed and also fixed in place using Latham Thixotropic Epoxy Adhesive. The systems offer various movements in 6 directions. The joint covers can be custom manufactured to suit joint widths and movement requirements of the structure. Contact your Latham Australia representative to discuss your projects exact requirements.

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Illustrated: XLCS-150
Stainless Steel Code A B C D E F G H Movement Total Available Movement Cover Plate Thickness Countersunk Head Fixings per 350mm centre
All measurements in millimetres. All mechanical expansion joint fixings by others.
XLCS-150 150 490 320 75 85 34 30 200 +/-135 270mm 6mm 4
XLCS-200 200 640 420 100 110 34 30 250 +/-185 370mm 6mm 4
XLCS-250 250 796 520 125 138 37 30 306 +/-235 470mm 9mm 6
XLCS-300 300 946 620 150 163 37 30 356 +/-285 570mm 9mm 8
XLCS-400 400 1246 820 200 213 37 30 456 +/-385 770mm 9mm 10
XLCS-500 500 1550 1020 250 265 40 30 560 +/-485 970mm 12mm 12
XLCS-600 600  1850 1220 300  315  40  30  660  +/-585 1170mm 12mm  12
6 Way Movement
Indoor
Outdoor
Water Gutter
Fire Barrier
Seismic

 

The Latham Seismic XLCS Series floor expansion joint covers are designed to accommodate normal thermal movement as well as seismic movement. The systems have stainless steel cover plates, and this series can carry a BFG water gutter if required. The series is designed to be installed generally into a preformed recess, although in some applications the product may not require a recess, depending on the type and depth of the floor finish. The Series can accommodate the Latham Fire Barrier System.

The Latham Seismic XLCS floor expansion joint covers are designed for normal pedestrian applications such as office buildings, hotels, foyers, shopping centres, airports etc, where seismic movement is a real possibility and the joints are required to perform after seismic movement has occurred. These joint covers can be used in conjunction with many floor finishes such as tile, timber, concrete, vinyl, direct stick carpet and carpet tiles, epoxy floors etc.

The systems offer various movements in 6 directions. The joint covers can be custom manufactured to suit the joint widths and movement requirements of the structure. Contact your Latham Australia representative to discuss your projects exact requirements.

 

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Illustrated: XLLS-150
Stainless Steel Code A B C D E F G H Movement Total Available Movement Cover Plate Thickness Countersunk Head Fixings per 350mm centre
All measurements in millimetres. All mechanical expansion joint fixings by others.
XLLS-150 150 455 305 140 150 34 30 335 +/-130 260mm 6mm 3
XLLS-200 200 605 405 190 200 34 30 435 +/-180 360mm 6mm 4
XLLS-250 250 758 505 240 253 37 30 538 +/-230 460mm 9mm 5
XLLS-300 300 908 605 290 303 37 30 638 +/-280 560mm 9mm 8
XLLS-400 400 1208 805 390 403 37 30 838 +/-380 760mm 9mm 8
XLLS-500 500 1510 1005 490 505 40 30 1040 +/-480 960mm 12mm 10
XLLS-600 600 1825 1205  590  605 40  30 1240  +/-580  1160mm  12mm  10
6 Way Movement
Indoor
Outdoor
Water Gutter
Fire Barrier
Seismic

 

The Latham Seismic XLLS Series floor expansion joint covers are designed to accommodate normal thermal movement as well as seismic movement. The systems have stainless steel cover plates, and this series can carry a BFG water gutter if required. The series is designed to be installed generally into a preformed recess, although in some applications the product may not require a recess, depending on the type and depth of the floor finish. The Series can accommodate the Latham Fire Barrier System.

The Latham Seismic XLLS floor expansion joint covers are designed for normal pedestrian applications such as office buildings, hotels, foyers, shopping centres, airports etc, where seismic movement is a real possibility and the joints are required to perform after seismic movement has occurred. These joint covers can be used in conjunction with many floor finishes such as tile, timber, concrete, vinyl, direct stick carpet and carpet tiles, epoxy floors etc.

The systems offer various movements in 6 directions. The joint covers can be custom manufactured to suit the joint widths and movement requirements of the structure. Contact your Latham Australia representative to discuss your projects exact requirements.

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Illustrated: SGAL-100 (SM)
Aluminium Code A B C D E F G H I Normal Everyday Movement Seismic Movement Cover Plate Thickness
Wider joint widths available on request. All dimensions in millimetres. All mechanical expansion joint fixings by others.
SGAL-50 (SM) 50 418 77 65 65 50 28 185 30 +/-20mm -30mm/+Unlimited 6mm
SGAL-75 (SM) 75 443 77 65 65 50 28 185 30 +/-20mm -50mm/+Unlimited 6mm
SGAL-100 (SM) 100 468 77 65 65 50 28 185 30 +/-20mm -75mm/+Unlimited 6mm
SGAL-150 (SM) 150 518 77 65 65 50 28 185 30 +/-20mm -125mm/+Unlimited 6mm
SGAL-200 (SM) 200 568 77 65 65 50 28 185 30 +/-20mm -175mm/+Unlimited 6mm
6 Way Movement
Indoor
Outdoor
Water Gutter
Fire Barrier
Seismic

The Latham Seismic PAVA-Inlay Series SGAL floor expansion joint covers are designed to accommodate a 50mm deep inlay. These systems offer both standard thermal building movement and in the case of a seismic event, the Santoprene inserts will dislodge and allow the cover plate to move the extreme amounts required during the seismic activity due to the specially designed and patented Lathamflex Centering Bar. Once the seismic event is over and assuming the structure settles back to its original position the Santoprene inserts will easily push back into their housings.

The Santoprene inserts are far superior to other competing inlay joint covers available that require sealant inserts which do not cope with movement and traffic, and depress or de-bond over time. The Santoprene inserts ensure that even with movement occurring the expansion joint covers look neat and tidy and continue to perform without requiring maintenance. The Santoprene inserts are available in grey (standard), buff and black on specification.


This Series can carry a BFG water gutter and if required the Series can accommodate the Latham Fire Barrier System when the installation joint width is 50mm or wider. The overall depth below the finished floor height is 65mm. The Latham PAVA Series floor expansion joint covers are designed for normal pedestrian applications such as airport terminals, office buildings, hotels, foyers, stadiums and shopping centres. The systems offer various movement in 6 directions.

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Illustrated: MSM-100
Aluminium Code A B C Movement Total Available Movement Overall Depth
All dimensions in millimetres. All mechanical expansion joint fixings by others.
MSM-100 100 337 48 +100/-92mm 192mm 28mm
MSM-150 150 437 48 +150/-142mm 292mm 28mm
MSM-200 200 537 48 +200/-190mm 392mm 28mm
MSM-250 250 637 48 +250/-242mm 492mm 28mm
MSM-300 300 737 48 +300/-292mm 592mm 28mm
MSM-400  400  937 48 +400/-392mm 792mm 28mm
 MSM-500 500   1137 48 +500/-492mm 992mm 28mm
 MSM-600 600   1337 48 +600/-592mm 1192mm 28mm 
6 Way Movement
Indoor
Outdoor
Water Gutter
Fire Barrier
Seismic

 

The Latham Seismic MSM Wall Series of expansion joint covers are designed to accommodate normal thermal movement as well as seismic movement. The series is designed to be surface mounted on walls and ceilings and can accommodate the Latham Fire Barrier System. This series can carry a BFG water gutter if required.

The Latham Seismic MSM Wall Series of Expansion Joint Covers are supplied in mill finish aluminium and, on request, the systems can be anodised or powder coated to compliment the architectural aesthetics of the design.


The systems offer various movements in 6 directions. The joint covers can be custom manufactured to suit joint widths and movement requirements of the structure. Contact your Latham Australia representative to discuss your projects exact requirements.

 

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Illustrated: MLSM-100
Aluminium Code A B C Movement Total Available Movement Overall Depth
All dimensions in millimetres. All mechanical expansion joint fixings by others.
MLSM-100 100 264 48 +100/-85mm 185mm 28mm
MLSM-150 150 364 48 +150/-135mm 285mm 28mm
MLSM-200 200 464 48 +200/-185mm 385mm 28mm
MLSM-250 250 564 48 +250/-235mm 485mm 28mm
MLSM-300 300 664 48 +300/-285mm 585mm 28mm
MLSM-400 400  864 48 +400/-385mm 785mm 28mm
 MLSM-500 500  1064  48  +500/-485mm  985mm  28mm
 MLSM-600 600  1264  48  +600/-585mm  1185mm   28mm
6 Way Movement
Indoor
Outdoor
Water Gutter
Fire Barrier
Seismic

 

The Latham Seismic MLSM Wall Series of expansion joint covers are designed to accommodate normal thermal movement as well as seismic movement. The series is designed to be surface mounted on walls and ceilings and can accommodate the Latham Fire Barrier System. This series can carry a BFG water gutter if required.

The Latham Seismic MLSM Wall Series of Expansion Joint Covers are supplied in mill finish aluminium and, on request, the systems can be anodised or powder coated to compliment the architectural aesthetics of the design.

The systems offer various movements in 6 directions. The joint covers can be custom manufactured to suit joint widths and movement requirements of the structure. Contact your Latham Australia representative to discuss your projects exact requirements.

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Illustrated: FWSM-100
Aluminium Code A B Movement Total Available Movement Cover Plate Thickness
All measurements in millimetres. All mechanical expansion joint fixings by others.
FWSM-100 100 260 +100/-92mm 192mm 2.5mm
FWSM-150 150 360 +150/-142mm 292mm 2.5mm
FWSM-200 200 460 +200/-192mm 392mm 2.5mm
FWSM-250 250 560 +250/-242mm 492mm 2.5mm
FWSM-300 300 660 +300/-292mm 592mm 2.5mm
FWSM-400  400  860  +400/-393mm 792mm 3mm
 FWSM-500 500  1060   +500/-492mm 992mm 3mm
 FWSM-600 600  1260   +600/-592mm 1192mm 3mm
6 Way Movement
Outdoor
Water Gutter
Fire Barrier
Seismic

 

The Latham Seismic FWSM roof expansion joint covers are designed to accommodate normal thermal movement as well as seismic movement. The series is designed to be surface mounted on roof slabs or hobs and can accommodate the Latham Fire Barrier system if required. This series is supplied standard with a BFG water gutter.

The Latham Seismic FWSM roof expansion joint covers are supplied in mill finish aluminium and, on request, the systems can be anodised or powder coated to compliment the architectural aesthetics of the design.

The systems offer various movements in 6 directions. The joint covers can be custom manufactured to suit joint widths and movement requirements of the structure. Contact your Latham Australia representative to discuss your projects exact requirements. 

 

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Illustrated: FWLSM-100
Aluminium Code A B Movement Total Available Movement Cover Plate Thickness
All measurements in millimetres. All mechanical expansion joint fixings by others.
FWLSM-100 100 233 +100/-75mm 175mm 2.5mm
FWLSM-150 150 333 +150/-125mm 275mm 2.5mm
FWLSM-200 200 433 +200/-175mm 375mm 2.5mm
FWLSM-250 250 533 +250/-225mm 475mm 2.5mm
FWLSM-300 300 633 +300/-275mm 575mm 2.5mm
FWLSM-400 400 833  +400/-375mm 755mm  3mm
 FWLSM-500 500  1033   +500/-475mm 975mm 3mm
 FWLSM-600 600  1233   +600/-575mm 1175mm 3mm
6 Way Movement
Outdoor
Water Gutter
Fire Barrier
Seismic

 

The Latham Seismic FWLSM roof-to-parapet expansion joint covers are designed to accommodate normal thermal movement as well as seismic movement. The series is designed to be surface mounted on roof slabs or hobs and can accommodate the Latham Fire Barrier system if required. This series is supplied standard with a BFG water gutter.

The Latham Seismic FWLSM roof-to-parapet expansion joint covers are supplied in mill finish aluminium and, on request, the systems can be anodised or powder coated to compliment the architectural aesthetics of the design.


The systems offer various movements in 6 directions. The joint covers can be custom manufactured to suit joint widths and movement requirements of the structure. Contact your Latham Australia representative to discuss your projects exact requirements.

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Illustrated: FRSM-100
Aluminium Code A B Movement Total Available Movement Cover Plate Thickness
All dimensions in millimetres. All mechanical expansion joint fixings by others.
FRSM-100 100 260 +100/-92mm 192mm 2.5mm
FRSM-150 150 360 +150/-142mm 292mm 2.5mm
FRSM-200 200 460 +200/-192mm 392mm 2.5mm
FRSM-250 250 560 +250/-242mm 492mm 2.5mm
FRSM-300 300 660 +300/-292mm 592mm 2.5mm
FRSM-400 400 860  +400/-392mm 792mm  3mm
FRSM-500 500  1060   +500/-492mm 992mm 3mm
FRSM-600 600  1260   +600/-592mm 1192mm 3mm
6 Way Movement
Outdoor
Water Gutter
Fire Barrier
Seismic

The Latham FRSM Seismic Series roof expansion joint covers are designed to accommodate normal thermal movement as well as seismic movement. The series is designed to be surface mounted on roof slabs or hobs and can accommodate the Latham Fire Barrier system if required. This series is supplied standard with a BFG water gutter.

The range can be installed on a concrete or timber hob. The elevated side members are installed high above the slabs. The side member is designed to assist in holding down the membrane material.

The Latham Seismic FRSM roof expansion joint covers are supplied in mill finish aluminium and, on request, the systems can be anodised or powder coated to compliment the architectural aesthetics of the design. If this is required, please contact a Latham representative to discuss the application.

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Illustrated: FRLSM-100
Aluminium Code A B Movement Total Available Movement Cover Plate Thickness
All dimensions in millimetres. All mechanical expansion joint fixings by others.
FRLSM-100 100 233 +100/-75mm 175mm 2.5mm
FRLSM-150 150 333 +150/-125mm 275mm 2.5mm
FRLSM-200 200 433 +200/-175mm 375mm 2.5mm
FRLSM-250 250 533 +250/-225mm 475mm 2.5mm
FRLSM-300 300 633 +300/-275mm 575mm 2.5mm
FRLSM-400 400 833 +400/-375mm 775mm 3mm
FRLSM-500 500  1033 +500/-475mm 975mm 3mm
FRLSM-600 600  1233 +600/-575mm 1175mm 3mm
6 Way Movement
Outdoor
Water Gutter
Fire Barrier
Seismic

The Latham FRLSM Seismic Series roof-to-parapet expansion joint covers are designed to accommodate normal thermal movement as well as seismic movement. The series is designed to be surface mounted on roof slabs or hobs and can accommodate the Latham Fire Barrier system if required. This series is supplied standard with a BFG water gutter.

The range can be installed on a concrete or timber hob. The elevated side members are installed high above the slabs. The side member is designed to assist in holding down the membrane material.

The Latham Seismic FRLSM roof expansion joint covers are supplied in mill finish aluminium and, on request, the systems can be anodised or powder coated to compliment the architectural aesthetics of the design. If this is required, please contact a Latham representative to discuss the application.

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Illustrated: FPSM-100
Aluminium Code A B Movement Total Available Movement Cover Plate Thickness
All dimensions in millimetres. All mechanical expansion joint fixings by others.
FPSM-100 100 260 +100/-92mm 192mm 2.5mm
FPSM-150 150 360 +150/-142mm 292mm 2.5mm
FPSM-200 200 460 +200/-192mm 392mm 2.5mm
FPSM-250 250 560 +250/-242mm 492mm 2.5mm
FPSM-300 300 660 +300/-292mm 592mm 2.5mm
FPSM-400  400  860 +400/-392mm 792mm 3mm
FPSM-500 500   1060 +500/-492mm 992mm 3mm
FPSM-600 600   1260 +600/-592mm 1192mm 3mm

 

6 Way Movement
Outdoor
Water Gutter
Fire Barrier
Seismic

The Latham FPSM Seismic Series roof expansion joint covers are designed to accommodate normal thermal movement as well as seismic movement. The series is designed to be surface mounted on roof slabs or hobs and can accommodate the Latham Fire Barrier system if required. This series is supplied standard with a BFG water gutter.

The range can be installed on a concrete or timber hob. The elevated side members are installed high above the slabs. The side member is designed to assist in holding down the membrane material.

The Latham Seismic FPSM roof expansion joint covers are supplied in mill finish aluminium and, on request, the systems can be anodised or powder coated to compliment the architectural aesthetics of the design. If this is required, please contact a Latham representative to discuss the application.

View and download our data sheets

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Illustrated: FPLSM-100
Aluminium Code A B Movement Total Available Movement Overall Depth
All dimensions in millimetres. All mechanical expansion joint fixings by others.
FPLSM-100 100 233 +100/-75mm 175mm 2.5mm
FPLSM-150 150 333 +150/-125mm 275mm 2.5mm  
FPLSM-200 200 433 +200/-175mm 375mm 2.5mm  
FPLSM-250 250 533 +250/-225mm 475mm 2.5mm  
FPLSM-300 300 633 +300/-275mm 575mm 2.5mm  
FPLSM-400  400  833 +400/-375mm 775mm 3mm  
FPLSM-500 500   1033 +500/-475mm 975mm 3mm  
FPLSM-600 600   1233 +600/-575mm 1175mm 3mm 
6 Way Movement
Outdoor
Water Gutter
Fire Barrier
Seismic

The Latham FPLSM Seismic Series roof-to-parapet expansion joint covers are designed to accommodate normal thermal movement as well as seismic movement. The series is designed to be surface mounted on roof slabs or hobs and can accommodate the Latham Fire Barrier system if required. This series is supplied standard with a BFG water gutter.

The range can be installed on a concrete or timber hob. The elevated side members are installed high above the slabs. The side member is designed to assist in holding down the membrane material.

The Latham Seismic FPLSM roof expansion joint covers are supplied in mill finish aluminium and, on request, the systems can be anodised or powder coated to compliment the architectural aesthetics of the design. If this is required, please contact a Latham representative to discuss the application.

View and download our data sheets

Download our section details 

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