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QBase® Mount

The QBase® Mount is a strong and versatile base-and-post mounting system with various post height options. The components are available separately and combined to build a custom solution that best suits your project. (Formerly sold as QMLSH and QMQDM kits or BTO)

The QBase® Mount base is made of super-strong cast aluminum, with four gussets to support 8 post heights from 3.25 to 17.5”—for a wide variety of roof types and installations. QBase® Mount’s versatility and superior strength will provide decades-long confidence.

QuickMount Q-Zap Technology

Build Your System, Your Way

QBase® Mount components are sold as separate SKUs so you can mix and match parts, tailoring your system to your exact specifications. Whether mounting onto the deck or a structural member, QBase® Mount has you covered. Just procure the appropriate type and quantity of fastener for your application and install.

QBase Base
  • The base goes with any post height
  • Strong cast aluminum, with gussets
  • Includes base-to-post hardware
QBase Mount Post Sizes
  • 8 post heights, from 3.25″-17.5″
  • Net height is post height plus 1/2″
  • Includes post-to-rack hardware
L-Foot Options
    • Multiple L-Foot options
    • 5 & 10-degree tilted options 
    • Compatible with XR Rail & QRail

NOTE: When utilized as a rafter-attached mount, two 5/16”x3” stainless steel lag screws with a minimum of 2” embedment into the structural member are recommended. For non-rafter attached applications, consult with a Structural Engineer to specify the type, size, and quantity of roof screws.

Features & Benefits

QBase Base

2 or 4-Hole Mounting Options

Four mounting hole options and four gussets that substantially improve load capacity.
QBase Mount Post Sizes
8 Available Post Heights

Posts come in the following height options: 3.25″, 4.5″, 6.5″, 8.5″, 11.5″, 12.5″, 14.5″, & 17.5″.

QBase Mount (Installed)
Attaches to Deck or Structural Member
Consult structural engineer for deck attachment. Use 5/16” x 3” stainless steel lags on rafters.
Flat Roof Material
Compatible with Most Roof Materials
Use on TPO, PVC, EPDM, built-up roofing, comp shingle, tile, shake, slate, and metal shingle roofs..
QBase Mount Approvals
8 Available Post Heights
Has LA Research Reports (LARR #26194) and Florida Product Approval (FL #29846).
25-Year Warranty
Products Come with 25-Year Warranty
Guaranteed to be free of defects in materials and manufacturing that impair proper usage.

Documentation & Support

UL 2703 Certification


All IronRidge® Systems have been listed to UL 2703, the standard for evaluating solar mounting systems. This ensures they maintain strong electrical and mechanical connections over an extended period of time in extreme outdoor environments.

25-Year Warranty

25-YR Warranty

IronRidge® products come with a 25-year warranty, guaranteeing they will be free of defects in materials and manufacturing which materially impair the use of the products for the purposes for which they were designed.

Product Patents