Publications

For over 35 years, we've been leaders in geotechnical and earthquake engineering, a legacy reflected in our extensive knowledge base of over 100 publications. Our publications demonstrate our commitment to innovation and knowledge sharing, keeping you informed about the latest advancements in our field.​

Delve into our cutting-edge research and analysis, advancing the field of geotechnical and earthquake engineering.

2019

Ream, A., Frankl, B., Chavel, B., Leshko, B., Schiller, B., Paterson, D., Wilson, P., Law, H., and Felice, 2019, ''Reference Guide for Load Rating of Tunnel Structures,'' Publication No. FHWA-HIF-19-010, Infrastructure Office of Bridges and Structures, U.S. Department of Transportation.

2019

Ream, A., Frankl, B., Chavel, B., Leshko, B., Schiller, B., Paterson, D., Wilson, P., Law, H., and Felice, 2019, ''Reference Guide for Load Rating of Tunnel Structures,'' Publication No. FHWA-HIF-19-010, Infrastructure Office of Bridges and Structures, U.S. Department of Transportation.

2019

Ream, A., Frankl, B., Chavel, B., Leshko, B., Schiller, B., Paterson, D., Wilson, P., Law, H., and Felice, 2019, ''Reference Guide for Load Rating of Tunnel Structures,'' Publication No. FHWA-HIF-19-010, Infrastructure Office of Bridges and Structures, U.S. Department of Transportation.

2013

Edge, B. E., Eskijian, M., Arulmoli, K., Boudreau, R., Carbuccia, M., Jaradat, O. A., Percher, M, and Serrano, J., 2013, "Chile Earthquake and Tsunami of 2010, Performance of Coastal Infrastructure," Report by the COPRI Chile Earthquake Investigation Team, Edited by B. L. Edge, Published by the American Society of Civil Engineers.

2013

Edge, B. E., Eskijian, M., Arulmoli, K., Boudreau, R., Carbuccia, M., Jaradat, O. A., Percher, M, and Serrano, J., 2013, "Chile Earthquake and Tsunami of 2010, Performance of Coastal Infrastructure," Report by the COPRI Chile Earthquake Investigation Team, Edited by B. L. Edge, Published by the American Society of Civil Engineers.

2013

Edge, B. E., Eskijian, M., Arulmoli, K., Boudreau, R., Carbuccia, M., Jaradat, O. A., Percher, M, and Serrano, J., 2013, "Chile Earthquake and Tsunami of 2010, Performance of Coastal Infrastructure," Report by the COPRI Chile Earthquake Investigation Team, Edited by B. L. Edge, Published by the American Society of Civil Engineers.

2011

Kavazanjian, E., Martin, G., Lam, I.P., and Hung, C., 2011, ''LRFD Seismic Analysis and Design of Transportation Geotechnical Features and Structure Foundations,'' US DOT Federal Highway Administration, Publication No FHWA-NHI-11-032.

Rollins, K., Brown, D., Law, H., and Chang, Z., 2011, ''Design Guidelines for Increasing the Lateral Resistance of Highway-Bridge Pile Foundations by Improving Weak Soils,'' NCHRP Report 697, Project 24-30, Transportation Research Board, National Cooperative Research Program, Washington D.C.

2011

Kavazanjian, E., Martin, G., Lam, I.P., and Hung, C., 2011, ''LRFD Seismic Analysis and Design of Transportation Geotechnical Features and Structure Foundations,'' US DOT Federal Highway Administration, Publication No FHWA-NHI-11-032.

Rollins, K., Brown, D., Law, H., and Chang, Z., 2011, ''Design Guidelines for Increasing the Lateral Resistance of Highway-Bridge Pile Foundations by Improving Weak Soils,'' NCHRP Report 697, Project 24-30, Transportation Research Board, National Cooperative Research Program, Washington D.C.

2011

Kavazanjian, E., Martin, G., Lam, I.P., and Hung, C., 2011, ''LRFD Seismic Analysis and Design of Transportation Geotechnical Features and Structure Foundations,'' US DOT Federal Highway Administration, Publication No FHWA-NHI-11-032.

Rollins, K., Brown, D., Law, H., and Chang, Z., 2011, ''Design Guidelines for Increasing the Lateral Resistance of Highway-Bridge Pile Foundations by Improving Weak Soils,'' NCHRP Report 697, Project 24-30, Transportation Research Board, National Cooperative Research Program, Washington D.C.

2008

Anderson, D. G., Martin, G.R., Lam, I.P., and Wang, J. N., 2008, ''Seismic Analysis and Design of Retaining Walls, Buried Structures, Slopes, and Embankments," NCHRP Report 611, Project 12-70, Transportation Research Board, National Cooperative Research Program, Washington D.C.

2008

Anderson, D. G., Martin, G.R., Lam, I.P., and Wang, J. N., 2008, ''Seismic Analysis and Design of Retaining Walls, Buried Structures, Slopes, and Embankments," NCHRP Report 611, Project 12-70, Transportation Research Board, National Cooperative Research Program, Washington D.C.

2008

Anderson, D. G., Martin, G.R., Lam, I.P., and Wang, J. N., 2008, ''Seismic Analysis and Design of Retaining Walls, Buried Structures, Slopes, and Embankments," NCHRP Report 611, Project 12-70, Transportation Research Board, National Cooperative Research Program, Washington D.C.

2007

Lam, I.P., Law, H., and Yang.C.T., 2007, ''Modeling of Seismic Wave Scattering Pile Groups and Caissons,'' Technical Report MCEER-07-0017, Multidisciplinary Center for Earthquake Engineering Research, September 17.

Lam, I.P., Law, H., and Martin, G.R., 2007, ''Bridge Foundations: Modeling Large Pile Groups and Caissons for Seismic Design,'' Technical Report MCEER-07-0018, Multidisciplinary Center for Earthquake Engineering Research, December 1.

Shamsabadi, A., Rollins, K., and Kapuskar, M., 2007, ''Nonlinear Soil-Abutment-Bridge Structure Interaction for Seismic Performance-Based Design,'' Journal of Geotechnical and Geoenvironmental Engineering, GT/2005/024259, ASCE, 133(6), pp. 707-720,
* Reference [17] in California Dept. of Transportation, Seismic Design Criteria, 2013, Version 1.7, Section 7.8, Longitudinal Abutment Response
* Reference in California Dept. of Transportation, Seismic Design Criteria, 2019, Version 2.0, Section 6.3.1, Longitudinal Abutment Response.

2007

Lam, I.P., Law, H., and Yang.C.T., 2007, ''Modeling of Seismic Wave Scattering Pile Groups and Caissons,'' Technical Report MCEER-07-0017, Multidisciplinary Center for Earthquake Engineering Research, September 17.

Lam, I.P., Law, H., and Martin, G.R., 2007, ''Bridge Foundations: Modeling Large Pile Groups and Caissons for Seismic Design,'' Technical Report MCEER-07-0018, Multidisciplinary Center for Earthquake Engineering Research, December 1.

Shamsabadi, A., Rollins, K., and Kapuskar, M., 2007, ''Nonlinear Soil-Abutment-Bridge Structure Interaction for Seismic Performance-Based Design,'' Journal of Geotechnical and Geoenvironmental Engineering, GT/2005/024259, ASCE, 133(6), pp. 707-720,
* Reference [17] in California Dept. of Transportation, Seismic Design Criteria, 2013, Version 1.7, Section 7.8, Longitudinal Abutment Response
* Reference in California Dept. of Transportation, Seismic Design Criteria, 2019, Version 2.0, Section 6.3.1, Longitudinal Abutment Response.

2007

Lam, I.P., Law, H., and Yang.C.T., 2007, ''Modeling of Seismic Wave Scattering Pile Groups and Caissons,'' Technical Report MCEER-07-0017, Multidisciplinary Center for Earthquake Engineering Research, September 17.

Lam, I.P., Law, H., and Martin, G.R., 2007, ''Bridge Foundations: Modeling Large Pile Groups and Caissons for Seismic Design,'' Technical Report MCEER-07-0018, Multidisciplinary Center for Earthquake Engineering Research, December 1.

Shamsabadi, A., Rollins, K., and Kapuskar, M., 2007, ''Nonlinear Soil-Abutment-Bridge Structure Interaction for Seismic Performance-Based Design,'' Journal of Geotechnical and Geoenvironmental Engineering, GT/2005/024259, ASCE, 133(6), pp. 707-720,
* Reference [17] in California Dept. of Transportation, Seismic Design Criteria, 2013, Version 1.7, Section 7.8, Longitudinal Abutment Response
* Reference in California Dept. of Transportation, Seismic Design Criteria, 2019, Version 2.0, Section 6.3.1, Longitudinal Abutment Response.

2006

Arulmoli, K., Schell, B. A., Abrahamson, N. A., and Lam, I.P., 2006, "Port- Wide Ground Motion and Palos Verdes Fault Study, Port of Los Angeles, California," Report to the Port of Los Angeles, San Pedro, California, December 22.


Arulmoli, K., Schell, B. A., Abrahamson, N. A., and Lam, I.P., 2006, "Port- Wide Ground Motion and Palos Verdes Fault Study, Port of Long Beach,"' Report to the Port of Long Beach, Long Beach, California, August 7.

2006

Arulmoli, K., Schell, B. A., Abrahamson, N. A., and Lam, I.P., 2006, "Port- Wide Ground Motion and Palos Verdes Fault Study, Port of Los Angeles, California," Report to the Port of Los Angeles, San Pedro, California, December 22.


Arulmoli, K., Schell, B. A., Abrahamson, N. A., and Lam, I.P., 2006, "Port- Wide Ground Motion and Palos Verdes Fault Study, Port of Long Beach,"' Report to the Port of Long Beach, Long Beach, California, August 7.

2006

Arulmoli, K., Schell, B. A., Abrahamson, N. A., and Lam, I.P., 2006, "Port- Wide Ground Motion and Palos Verdes Fault Study, Port of Los Angeles, California," Report to the Port of Los Angeles, San Pedro, California, December 22.


Arulmoli, K., Schell, B. A., Abrahamson, N. A., and Lam, I.P., 2006, "Port- Wide Ground Motion and Palos Verdes Fault Study, Port of Long Beach,"' Report to the Port of Long Beach, Long Beach, California, August 7.

2005

Kapuskar, M., and Law, H., Earth Mechanics, Inc., 2005, "Field Investigation for Abutment Backfill Characterization, Response Assessment of Bridge Systems - Seismic, Live, and Long Term Loads, Task 3," RTA Contract No. 59 A0337, Report to Dept. of Structural Engineering, UC San Diego, La Jolla, and Caltrans Office of Earthquake Engineering, Sacramento.

2005

Kapuskar, M., and Law, H., Earth Mechanics, Inc., 2005, "Field Investigation for Abutment Backfill Characterization, Response Assessment of Bridge Systems - Seismic, Live, and Long Term Loads, Task 3," RTA Contract No. 59 A0337, Report to Dept. of Structural Engineering, UC San Diego, La Jolla, and Caltrans Office of Earthquake Engineering, Sacramento.

2005

Kapuskar, M., and Law, H., Earth Mechanics, Inc., 2005, "Field Investigation for Abutment Backfill Characterization, Response Assessment of Bridge Systems - Seismic, Live, and Long Term Loads, Task 3," RTA Contract No. 59 A0337, Report to Dept. of Structural Engineering, UC San Diego, La Jolla, and Caltrans Office of Earthquake Engineering, Sacramento.

2000

Lam, I.P. and Law, H., 2000, "Soil Structure Interaction of Bridges for Seismic Analysis,' Technical Report MCEER-00-0008, Multidisciplinary Center for Earthquake Engineering Research, September 25.

2000

Lam, I.P. and Law, H., 2000, "Soil Structure Interaction of Bridges for Seismic Analysis,' Technical Report MCEER-00-0008, Multidisciplinary Center for Earthquake Engineering Research, September 25.

2000

Lam, I.P. and Law, H., 2000, "Soil Structure Interaction of Bridges for Seismic Analysis,' Technical Report MCEER-00-0008, Multidisciplinary Center for Earthquake Engineering Research, September 25.

1999

I. P. Lam, Martin, G.R., and M. Kapuskar, 1999, "Synthesis Report on Foundation Stiffness and Sensitivity Evaluation on Bridge Response," Seismic Vulnerability of New (Project 112) and Existing (Project 106) Highway Construction, Task 112-D-3.8, Foundations and Soil-Structure Interaction, Draft Final Report/Extended Technical Summary, MCEER and FHWA Contract DTFH61-92-C-00112, Task No. 112-D-3.8; Applied Technology Council, Project ATC-18-1, Catalog 99-0009, Section 3.29, Sept. 1.

1999

I. P. Lam, Martin, G.R., and M. Kapuskar, 1999, "Synthesis Report on Foundation Stiffness and Sensitivity Evaluation on Bridge Response," Seismic Vulnerability of New (Project 112) and Existing (Project 106) Highway Construction, Task 112-D-3.8, Foundations and Soil-Structure Interaction, Draft Final Report/Extended Technical Summary, MCEER and FHWA Contract DTFH61-92-C-00112, Task No. 112-D-3.8; Applied Technology Council, Project ATC-18-1, Catalog 99-0009, Section 3.29, Sept. 1.

1999

I. P. Lam, Martin, G.R., and M. Kapuskar, 1999, "Synthesis Report on Foundation Stiffness and Sensitivity Evaluation on Bridge Response," Seismic Vulnerability of New (Project 112) and Existing (Project 106) Highway Construction, Task 112-D-3.8, Foundations and Soil-Structure Interaction, Draft Final Report/Extended Technical Summary, MCEER and FHWA Contract DTFH61-92-C-00112, Task No. 112-D-3.8; Applied Technology Council, Project ATC-18-1, Catalog 99-0009, Section 3.29, Sept. 1.

1998

Lam, I.P., Kapuskar, M., and Chaudhuri, D., 1998, "Modeling of Pile Footings and Drilled Shafts for Seismic Design,"' Technical Report MCEER-98-0018, Multidisciplinary Center for Earthquake Engineering Research, December 21.


Lam, I.P., and Kapuskar, M., 1998, "Modeling of Bridge Abutments in Seismic Response Analysis of Highway Bridges,' Technical Report, MCEER and FHWA Contract DTFH61-92-C-00112, Seismic Vulnerability of New Highway Construction, Task 112-D-3.3; Foundations and Soil- Structure Interaction, Applied Technology Council, Project ATC-18-1, Catalog 99-0009, Section 3.24, p. 87, Aug. 24.

1998

Lam, I.P., Kapuskar, M., and Chaudhuri, D., 1998, "Modeling of Pile Footings and Drilled Shafts for Seismic Design,"' Technical Report MCEER-98-0018, Multidisciplinary Center for Earthquake Engineering Research, December 21.


Lam, I.P., and Kapuskar, M., 1998, "Modeling of Bridge Abutments in Seismic Response Analysis of Highway Bridges,' Technical Report, MCEER and FHWA Contract DTFH61-92-C-00112, Seismic Vulnerability of New Highway Construction, Task 112-D-3.3; Foundations and Soil- Structure Interaction, Applied Technology Council, Project ATC-18-1, Catalog 99-0009, Section 3.24, p. 87, Aug. 24.

1998

Lam, I.P., Kapuskar, M., and Chaudhuri, D., 1998, "Modeling of Pile Footings and Drilled Shafts for Seismic Design,"' Technical Report MCEER-98-0018, Multidisciplinary Center for Earthquake Engineering Research, December 21.


Lam, I.P., and Kapuskar, M., 1998, "Modeling of Bridge Abutments in Seismic Response Analysis of Highway Bridges,' Technical Report, MCEER and FHWA Contract DTFH61-92-C-00112, Seismic Vulnerability of New Highway Construction, Task 112-D-3.3; Foundations and Soil- Structure Interaction, Applied Technology Council, Project ATC-18-1, Catalog 99-0009, Section 3.24, p. 87, Aug. 24.

1996

ATC (incl. Lam, I.P.), 1996, ATC-32, ''Improved Seismic Design Criteria for California Bridges: Provisional Recommendations,'' Applied Technology Council, Redwood City, CA.

1996

ATC (incl. Lam, I.P.), 1996, ATC-32, ''Improved Seismic Design Criteria for California Bridges: Provisional Recommendations,'' Applied Technology Council, Redwood City, CA.

1996

ATC (incl. Lam, I.P.), 1996, ATC-32, ''Improved Seismic Design Criteria for California Bridges: Provisional Recommendations,'' Applied Technology Council, Redwood City, CA.

1991

Bardet, J.-P. and Kapuskar, M., 1991, ''Preliminary Results on the Dynamic Response of the Marina District of San Francisco During the Loma Prieta Earthquake,'' Proceedings, 3rd US-Japan Workshop on Earthquake Resistant Design of Lifeline Facilities and Countermeasures for Soil Liquefaction, Dec. 17-19, edited by T.D. O'Rourke/M. Hamada, NCEER, Buffalo, Technical Report NCEER-91-0001, San Francisco.

1991

Bardet, J.-P. and Kapuskar, M., 1991, ''Preliminary Results on the Dynamic Response of the Marina District of San Francisco During the Loma Prieta Earthquake,'' Proceedings, 3rd US-Japan Workshop on Earthquake Resistant Design of Lifeline Facilities and Countermeasures for Soil Liquefaction, Dec. 17-19, edited by T.D. O'Rourke/M. Hamada, NCEER, Buffalo, Technical Report NCEER-91-0001, San Francisco.

1991

Bardet, J.-P. and Kapuskar, M., 1991, ''Preliminary Results on the Dynamic Response of the Marina District of San Francisco During the Loma Prieta Earthquake,'' Proceedings, 3rd US-Japan Workshop on Earthquake Resistant Design of Lifeline Facilities and Countermeasures for Soil Liquefaction, Dec. 17-19, edited by T.D. O'Rourke/M. Hamada, NCEER, Buffalo, Technical Report NCEER-91-0001, San Francisco.

1986

Lam, I.P., and Martin, G.R., 1986, ''Seismic Design of Highway Bridge Foundations, Vol. II Design Procedures and Guidelines,'' Report FHWA/RD-86/102, U.S. Dept. of Transportation, Federal Highway Administration, Washington D.C., June.

1986

Lam, I.P., and Martin, G.R., 1986, ''Seismic Design of Highway Bridge Foundations, Vol. II Design Procedures and Guidelines,'' Report FHWA/RD-86/102, U.S. Dept. of Transportation, Federal Highway Administration, Washington D.C., June.

1986

Lam, I.P., and Martin, G.R., 1986, ''Seismic Design of Highway Bridge Foundations, Vol. II Design Procedures and Guidelines,'' Report FHWA/RD-86/102, U.S. Dept. of Transportation, Federal Highway Administration, Washington D.C., June.

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Fountain Valley (Head office)

17800 Newhope Street
Suite B
Fountain Valley, CA 92708
(714) 751-3826

Inland Empire

765 North Main Street
Suite 136
Corona, CA 92880
(714) 751-3826

San Francisco Bay Area

3541 Investment Boulevard
Suite 4
Hayward, CA 94545
(510) 562-8833

San Diego

820 Los Vallecitos Boulevard
Suite H
San Marcos, CA 92069
(760) 736-8222

Ⓒ2025, Earth Mechanics. All rights reserved.

At Earth Mechanics Inc. (EMI), your privacy is our priority. We do not collect or use your personal information for marketing purposes. All communications via SMS are strictly conversational in nature and initiated based on your interactions with EMI.

By providing your phone number, you consent to receive occasional, conversational SMS messages from Earth Mechanics Inc. Message frequency may vary, with an average of 1–2 messages per month. SMS numbers are never sold, shared, or disclosed to third parties without your explicit consent, except as required by law. All personal data, including SMS correspondence, is stored securely and handled in accordance with our privacy standards. We do not transfer your information to external organizations under any circumstances unrelated to legal compliance.

This website may include embedded content (e.g., videos, images, or articles) from third-party websites. Such content behaves as if you visited the third-party site directly. These websites may collect data, use cookies, and track your interaction with the embedded content—especially if you are logged in to their platform.

Some media assets used on this site, including video content, are licensed from Adobe Stock under appropriate licensing terms. These assets are used in compliance with Adobe’s Enhanced License, and no attribution is required.

If you have any questions about this policy or your data privacy, please contact us at info@earthmech.com.

Fountain Valley (Head office)

17800 Newhope Street
Suite B
Fountain Valley, CA 92708
(714) 751-3826

Inland Empire

765 North Main Street
Suite 136
Corona, CA 92880
(714) 751-3826

San Francisco Bay Area

3541 Investment Boulevard
Suite 4
Hayward, CA 94545
(510) 562-8833

San Diego

820 Los Vallecitos Boulevard
Suite H
San Marcos, CA 92069
(760) 736-8222

Ⓒ2025, Earth Mechanics. All rights reserved.

At Earth Mechanics Inc. (EMI), your privacy is our priority. We do not collect or use your personal information for marketing purposes. All communications via SMS are strictly conversational in nature and initiated based on your interactions with EMI.

By providing your phone number, you consent to receive occasional, conversational SMS messages from Earth Mechanics Inc. Message frequency may vary, with an average of 1–2 messages per month. SMS numbers are never sold, shared, or disclosed to third parties without your explicit consent, except as required by law. All personal data, including SMS correspondence, is stored securely and handled in accordance with our privacy standards. We do not transfer your information to external organizations under any circumstances unrelated to legal compliance.

This website may include embedded content (e.g., videos, images, or articles) from third-party websites. Such content behaves as if you visited the third-party site directly. These websites may collect data, use cookies, and track your interaction with the embedded content—especially if you are logged in to their platform.

Some media assets used on this site, including video content, are licensed from Adobe Stock under appropriate licensing terms. These assets are used in compliance with Adobe’s Enhanced License, and no attribution is required.

If you have any questions about this policy or your data privacy, please contact us at info@earthmech.com.

Fountain Valley (Head office)

17800 Newhope Street
Suite B
Fountain Valley, CA 92708
(714) 751-3826

Inland Empire

765 North Main Street
Suite 136
Corona, CA 92880
(714) 751-3826

San Francisco Bay Area

3541 Investment Boulevard
Suite 4
Hayward, CA 94545
(510) 562-8833

San Diego

820 Los Vallecitos Boulevard
Suite H
San Marcos, CA 92069
(760) 736-8222

Ⓒ2025, Earth Mechanics. All rights reserved.

At Earth Mechanics Inc. (EMI), your privacy is our priority. We do not collect or use your personal information for marketing purposes. All communications via SMS are strictly conversational in nature and initiated based on your interactions with EMI.

By providing your phone number, you consent to receive occasional, conversational SMS messages from Earth Mechanics Inc. Message frequency may vary, with an average of 1–2 messages per month. SMS numbers are never sold, shared, or disclosed to third parties without your explicit consent, except as required by law. All personal data, including SMS correspondence, is stored securely and handled in accordance with our privacy standards. We do not transfer your information to external organizations under any circumstances unrelated to legal compliance.

This website may include embedded content (e.g., videos, images, or articles) from third-party websites. Such content behaves as if you visited the third-party site directly. These websites may collect data, use cookies, and track your interaction with the embedded content—especially if you are logged in to their platform.

Some media assets used on this site, including video content, are licensed from Adobe Stock under appropriate licensing terms. These assets are used in compliance with Adobe’s Enhanced License, and no attribution is required.

If you have any questions about this policy or your data privacy, please contact us at info@earthmech.com.

Fountain Valley (Head office)

17800 Newhope Street
Suite B
Fountain Valley, CA 92708
(714) 751-3826

Inland Empire

765 North Main Street
Suite 136
Corona, CA 92880
(714) 751-3826

San Francisco Bay Area

3541 Investment Boulevard
Suite 4
Hayward, CA 94545
(510) 562-8833

San Diego

820 Los Vallecitos Boulevard
Suite H
San Marcos, CA 92069
(760) 736-8222

Ⓒ2025, Earth Mechanics. All rights reserved.

At Earth Mechanics Inc. (EMI), your privacy is our priority. We do not collect or use your personal information for marketing purposes. All communications via SMS are strictly conversational in nature and initiated based on your interactions with EMI.

By providing your phone number, you consent to receive occasional, conversational SMS messages from Earth Mechanics Inc. Message frequency may vary, with an average of 1–2 messages per month. SMS numbers are never sold, shared, or disclosed to third parties without your explicit consent, except as required by law. All personal data, including SMS correspondence, is stored securely and handled in accordance with our privacy standards. We do not transfer your information to external organizations under any circumstances unrelated to legal compliance.

This website may include embedded content (e.g., videos, images, or articles) from third-party websites. Such content behaves as if you visited the third-party site directly. These websites may collect data, use cookies, and track your interaction with the embedded content—especially if you are logged in to their platform.

Some media assets used on this site, including video content, are licensed from Adobe Stock under appropriate licensing terms. These assets are used in compliance with Adobe’s Enhanced License, and no attribution is required.

If you have any questions about this policy or your data privacy, please contact us at info@earthmech.com.