HomeMy WebLinkAboutEngineer's Design Report 12.07.2017December 4, 2017
Gary R. Reeder, P.E.
Registered Professional Engineer
2937 Four Corners Drive, Grand Junction, CO 81503
cell: 970/250-9242
e-mail: garyreeder34@gmail.com
TO: Foundation Repair of Western Colorado
2575 Hwy 6 & 50
Grand Junction, CO 81505
info@foundationsupportco.com
RE: Underpinning (Piering) Project
987 Black Diamond Mine Road
Glenwood Springs, CO 81601
The proposed piering plan is attached. Eight (8) System 350 push piers are proposed as shown on the
attached plan. The engineering calculations were based on the fact that the soil will be excavated outside
the concrete foundation walls.
The initial laser -level elevation survey was done by Foundation Repair of Western Colorado (FRWC).
The maximum elevation difference between the high and low areas is 2-7/8". Refer to the "Initial
Elevation Survey" drawing that is attached.
Keep in mind that with piering projects, the field conditions encountered during the piering project may
dictate a change in the number of piers and in pier spacing. Unknown subsurface conditions can influence
a change in plan, such as:
• the location of piping and electrical cables,
• unknown footing widths when house plans are not available,
• unknown amount and size of rebar in footings and walls,
• the presence of subsurface cobblestones and boulders,
• other unknown conditions that may be encountered.
■ Residential Structural Inspections
■ Foundation Design and Piering
987 Black Diamond Mine Road
page 2
December 4, 2017
There are certain situations where short steel beams of HSS cross-section are installed between the
bottom of the footing and the pier bracket to help reduce the point -load pressure from the pier bracket and
to provide support over a larger section of footing and wall. For example, some circumstances where
these beams are used are: under concrete foundation wall/footing cracks; under doors and windows where
there is a short stem wall height or no stem wall at all. These short steel beams may be used if conditions
warrant.
A void of unknown volume may be created under the basement slabs as the foundation walls are raised. If
this occurs, you should consider stabilizing these slabs with PoIyLEVEL foam. The foam offers better
slab stability and is more economical than mudjacking. It is my understanding that PoIyLEVEL foam is
being considered to be used at the basement slab in the vicinity near the walls that will be piered.
I will be available for consultation throughout the duration of this project, and I will be on site at least
once during the piering process. I will be present on site during the lift helping with the final elevation
survey. When the project is successfully completed and finalized, I will certify the project as such by
letter and/or e-mail.
Please call me if you have any questions.
Respectfully submitted,
Gary R. Reeder, PE
CO #19404
attachments (2)
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