Log in - WebLEM

Quickly search and retrieve data

Our search engine will find any text located in the entire database, and give you links directly to the matches.
Access Up-to-date labor units on the latest products and joining methods

You can easily identify new and/or changed items because they will be highlighted yellow for 12 months.
Access MCAA’s standard for BIM Content creation

Download our standard for creating BIM content so you can more easily work with others in our industry.

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WebLEM Subscriber?

MCAA and MSCA contractor members receive free access to the WebLEM as a benefit of membership. For inquiries regarding your username/password, click on "Login to WebLEM and click on "Forgot your password?" to retrieve your password (use your company email as your username), or contact weblemsupport@mcaa.org. For inquiries about WebLEM, contact Dariush (Nick) Nikpourfard. For membership information, contact Jan Grillo. If you are a non-member you may subscribe to the WebLEM by downloading and completing the following subscription agreement form.

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Software Companies

Authorized to Distribute WebLEM Data to Subscribers

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Web-Based Labor Estimating Manual (WebLEM)

Web-Based Labor Estimating Manual

WebLEM

Quickly search and retrieve data

Access Up-to-date labor units on the latest products and joining methods

Access MCAA’s standard for BIM Content creation

MCAA Mechanical Contractors Association of America