MLC CONSTRUCTION SERVICES

Concept     Feasibility     Design     Build     Manage

Full Flight Porch Landing and Stairs

Technical

Photos

Project Description:

Goals:

  1. Replace existing failed landing and staircase.
  2. Reinforce existing porch frame.
  3. Replace all screens.

MLC Assessment:

  1. Multiple structural failures.
  2. Multiple building code violations.
  3. Significant safety issues (ledger connections, stringers, rail posts) due to age and sub-standard construction techniques and materials.
  4. Porch lacking lateral restraint support.

Applicable Building Codes:

  1. Massachusetts 780 CMR Rev 8 Builidng Code
  2. IRC 2009 Building Code
  3. DCA6-09 Design For Code Acceptance
Framing:
  Base Framing Material -MCA pressure-treated #1 grade lumber.
  Landing - 2x8 12" o.c. with blocking for picture frame layout.
Add 4x4 support under porch rim for landing attachment.
4x4 rail posts blocked in two directions and atached with 1/2" HDG carriage bolts.
  Stairs - 2x12 cut stringers 12" o.c.
Stringers reinforced with 2x4's (glued and bolted).
2x4 thrust plate at stringer base anchored to landing pad.
4x4 rail posts blocked in two directions and atached with 1/2" HDG carriage bolts.
  Screened Porch - Install lateral restraints at 4x6 support posts.
Reinforce ledger to house rim with Ledgerlok bolts.
Replace all screens with heavy duty high visibility screens.
Misc:
  Z-Max treated hangers and connectors.
Vycor Plus® protection on critical surfaces.
Pre-wire rail posts for future low voltage lighting.
Finish Materials:
  Decking and Treads - Azek Brownstone 5/4" x 6" decking
Picture framed layout.
  Trim and Risers - Versatek 1/2" PVC trimboard
  Guardrails and Handrails - Polyrail TRX vinyl over aluminum
Attachment Methods:
  Decking and Stair Treads - Cortex stainless steel screws and color-matched plugs
  Risers and Trim - 15 ga. stainless steel nails. Finished with TrimWelder PVC filler

Photos

Original Landing and Stairs

Completed Landing and Stairs

Construction Views

Original Landing and Stairs

Click on a thumbnail for a larger image


Staircase

Landing attachment at porch

Landing guardrails

Stringer attachment

Completed Stairs

Click on a thumbnail for a larger image

Construction Views

Click on a thumbnail for a larger image

© 2006-2016, MLC Construction Services

     Lightbox2 - Courtesy of Lokesh Dhakar

return to top