Existing Pool Facility Addition

[Papio Bldg Dept]

Adding a Chlorine Chemical & Equipment Storage Rooms adjacent to the enclosed Equipment/Pump Room (1,395 SF)end of existing Pool Building.

Middle wing is open air, with each end enclosed. Existing enclosed spaces do not have continuous frost protected footings under bearing walls (portions adjacent to proposed addition have lowered floors which result in frost protection) and are not conditioned during freeze thaw cycles. The new 379 SF addition is to utilize an existing planter retaining wall with no frost protection as a bearing stem wall for new wood construction. The addition by itself would be exempt from footing requirements, but utilizes the exisinting bearing wall for the equip/pump room and exceeds the exemption square footage for frost protection.

Am I missing something here? Again, the existing and new spaces will not be conditioned during freeze/thaw cycles, and while portions of the wall are frost protected by adjacent grade, not all portions are.

Any insight into 1805.2.1 would be appreciated. Thanks.

 

[Papio Bldg Dept]

Additional information: Informed that existing structure is a floating slab on gravel bed designed to function as a concrete raft. Proposed conc. planter walls are not shown to be designed as part of this system.

 

[gbhammer]

Give them a choice to make it free standing or get an engineer. It should not be to difficult to isolate the shelter/planter box from the existing structure.

 

[mtlogcabin]

Get a copy of ASCE 32 for your office. great resource and easy to understand. The engineering is already done.

[h=1]ASCE 32-01[/h]Design and Construction of Frost-Protected Shallow Foundation, (FPSF)

American Society of Civil Engineers / 01-Dec-2001 / 48 pages

ISBN: 0784405646

 

[Papio Bldg Dept]

Thanks mt...it has been on my wish list for awhile now.

 

[Papio Bldg Dept]

Should I have any concerns about differential settling with such a small addition bearing on the existing floating slab structure (assuming that is not addressed in ASCE 32)?

 

[gbhammer]

Should I have any concerns about differential settling with such a small addition bearing on the existing floating slab structure (assuming that is not addressed in ASCE 32)?

Any engineer worth his salt will say that you will have differential settling. Just think of how many times you have seen a crack or gaps in even small masonry planters next to and tied into buildings. It is not a question of if it will happen but when it will happen.