Foundation Cracks? Call 415-457-5658 for a prompt, reliable estimate from our experienced estimator. RWR has been repairing foundation cracks, doing excavation, and drilling work in San Francisco for over 24 years. You will see our trucks and equipment working in San Francisco neighborhoods like the Marina, Pacific Heights, Nob Hill, Western Addition, Haight, Castro, Noe Valley, Twin Peaks and so on.

Here’s the kind of detailed estimate you can rely on, to correct foundation problems and perform structural work, including even zero lot line jobs that require our expertise:

This estimate is based on drawings. The scope of work is for demolition of the existing parking deck and house decks as identified in plans, drilling and installing concrete reinforced piers, excavation and compaction, grade beams, concrete retaining walls, a new parking deck including concrete pad on parking structure and some new driveway slab. The price includes all labor and material to complete the work as per the itemized Scope of Work below.

Scope of Work
Mobilization and Layout
• Mobilize to jobsite with track drilling equipment, excavation and other necessary equipment to complete job (See notes below).
• Layout job site per plans and specifications
• Daily Cleanup
• Final Cleanup

Demo & Excavation

Demo
• Demo existing parking deck and off haul debris from site per plans and specifications S1 and S2.
• Demo existing deck around house and off haul debris from site per plans and specifications S1 and S2.
• Demo part of driveway slab and off haul debris from site.
Excavation & Compaction
• Excavate for new storage area per plans and specifications approximately 24 ft x 10 ft x 13 ft on a triangle to achieve a level area before the parking deck.
• Reinstall and compact driveway per plans and specifications (Compaction must be approved by others).
• Note: See notes regarding off haul.

Installation

Piers (For all locations)
• Drill nine (9) 18” diameter holes x a maximum depth of 10 ft per plans and specifications S2, S3 and S4. An allowance of 326 feet has been provided for 18” diameter piers. Final depths to be determined by engineer. See hard rock drilling conditions.
• Install nine (9) 18” diameter concrete reinforced piers x maximum depth of 10 ft per plans and specifications S2, S3 and S4. No Deduct
• Drill seven (7) 12” diameter holes x a maximum depth of 10 ft per plans and specifications S2, S3 and S4. Final depths to be determined by engineer. See hard rock drilling conditions.
• Install seven (7) 12” diameter concrete reinforced piers x 10 ft per plans and specifications S2, S3 and S4. No deduct.
• Install and form sonotube above grade as necessary at 12 inch piers a maximum of 4 ft per pier. Pour concrete above grade per plans and specifications S4. Additional cost if height is greater than 4 ft.
• Include seven (7) galvanized base CB66 brackets per plans and specifications.
• Use pier spoils as backfill at site

Grade Beams and Tie Beams
• Excavate for grade beams and tie beams for retaining walls, parking structure and deck piers per plans and specifications S2, S3 and S4.
• Spoils to be retained at site
• Install approximately 98 linear ft of concrete reinforced grade beams 1.0 x 1.5 and 10” x 10” per plans and specifications S2, S3 and S4.
• Drill and install approximately 48 epoxy dowels into existing foundation per plans and specifications.
Concrete Retaining Walls
• Install approximately 371 sq ft of 12 inch thick concrete reinforced retaining walls ranging from a minimum of 3 ft tall to a maximum of 10 ft tall per plans and specifications S2, S3 and S4. Wall is turned at East side capturing and retaining soil as required. Price assumes stepped grade beam on remaining East side stepped with grade.
• On garage side of parking structure install a 6 inch wide concrete retaining wall a maximum of 6 ft high following the existing foundation of garage. Note: This is an unknown condition. Price excludes any shoring or underpinning of existing foundation if required.
• Walls are to be formed or shotcrete.
• If walls are Shotcrete walls then walls will be finished with sponge finish.

Drainage
• Install 75 linear ft consisting of a rock pocket 8” x 12” wrapped in a burrito of filter fabric with a 4” SDR 35 perforated drain pipe per plans and specifications S2, S3 and S4.
• Install approximately 40 linear ft of tight SDR 35 pipe with cleanouts as necessary to exit perforated drain pipe down hill per plans and specifications S2, S3 and S4.
• Terminate perforated pipe into tight pipe and exit downhill. Note plans do not show final exit and price is subject to adjustment if additional final exit requirements are made by engineer.
• Install approximately 371 sq. ft of Miradrain on backside of walls per plans and specifications S2, S3 and S4.
• Install approximately 371 sq. ft of Paraseal on backside of walls per plans and specifications S2, S3 and S4.
• Note: Plans do not show any waterproofing on side of parking structure. Estimate assumes waterproofing will be required and is included.

Carport Structural
• Install the following for the carport deck per plans and specifications S2 and S3 as follows:
o Approximately Twenty three (23) 2-11/16 x 11-7/8 PSL Joists every 12”. (Note plans call for every 24” however this is modified to every 12” as noted).
o Approximately 159 linear ft of Microllam edge blocking
o New 1-1/8 inch TGPT Plywood for car deck
o New 2×6 inch framed wall
o New 3×4 PT sill
o New ½” plywood sheathing on exterior
• Install approximately 300 sq. ft of MiraDRI 860 membrane for waterproofing of parking deck following manufacturers recommendations.
• Note: Exclude any windows, doors or exterior finish (stucco or siding). Exclude paint.
• Price excludes railing

Carport Structure Slab
• Install approximately 300 sq. ft. of 3.5 inch new concrete reinforced pad on the 1-1/8 inch plywood deck and approximately 275 sq. ft of 4 inch concrete reinforced slab on grade over 4 inches of drain rock. Steel trowel finish.
• Include approximately 44 linear ft of 6 inch wide curb on perimeter of carport structure per plans and specifications S3.
• Note: It is strongly recommended that the carport slab includes Xypex concrete additive. This is a waterproofing additive which is added to concrete at the batch plant.

The following are alternatives for further consideration:

Alternative #1

Price excludes off haul of spoils.
Alternative #2

• Install small wood lag landscape retaining wall in back for retention of spoils. Location to be approved by owner.
• Wall is to be a maximum of 2.5 ft high from grade and a maximum of 45 linear ft.
• Wall is constructed of a maximum of nine (9) 4×6 PT Posts to a maximum of 5 ft deep in concrete
• Wood lag is 3×4 PT
• No drainage
• Does not guarantee this will be sufficient for retaining all spoils excavated. If additional spoils need to be removed cost is per yard as quoted in Alternative #1.
Alternative #3

• Below carport structure on the interior of the new storage area install a new 4 inch concrete reinforced slab on grade over 2 inches of sand over a 6 mil vapor barrier and 4 inches of drain rock.
• Slab is to include #4 rebar @ 12 inches o.c.
• Steel troweled finish
Qualifications and Clarifications
• Job is bid as package unless agreement to otherwise
• Includes one mobilization only
• Prices are subject to adequate supply of wood, steel, rock, concrete, asphalt, PVC resins, PVC pipe, fittings at prices quoted at bid time and are good for 30 days.
• Proposal is based on working std 40 hours per week, 5 work days and mutually agreeable schedules.
• Work to be completed as outlined above. No additional items without change order.
• Survey of property lines must be done by licensed surveyor.
• Price excludes shoring or underpinning. If shoring or underpinning is required then work will be performed on a Time and Material basis unless a Change Order is executed for the additional work.
• New deck to be installed by others
• All excavation cuts greater than 5 ft require the contractor to possess a CalOSHA shoring/excavation license. Fully licensed to accomplish such excavations.
• Progress payments every two weeks.

Exclusions
• Cost of plans, permits, bonds, testing and inspections.
• Increased cost of drilling or excavation due to hard rock, underground water or caving soils. (Hard rock drilling is defined as a penetration rate slower than 1 ft. in 5 minutes.) (Hard rock excavation is defined as material that cannot be excavated with a conventional backhoe or excavator bucket.)
• Any work on utilities including buried pipes or irrigation pipes.
• Replacement of damaged landscaping, driveway or fence.
• Excavation and off hauling of hazardous materials, underground tanks, or materials unacceptable at dumps.
• Any work related to landscaping, fences, railing or gates except as outlined
• Additional drainage not specifically outlined in this proposal.
• Earth or Structural shoring including underpinning of house (to be completed on a Time and Material basis if required).
• Winterization erosion control items (to be completed on a Time and Material basis if required)
• Electrical or Plumbing except as outlined in this proposal
• New Deck
• Backfill or Compaction of any soils not outlined in this proposal.
• Importation of backfill material except as noted.
• Survey of property lines
• Landscaping or irrigation