DID YOU KNOW?
2. You are required to design the connection grade beams/
ties for the longitudinal forces noted in ASCE Section
12.13.5/6.2, depending on your SDC.
3. You should use two rows of staggered piles for structural
walls (i.e., concrete shear walls) being supported on pile
foundations, unless you meet the code Exceptions paragraph
for low-rise structures.
4. You are required to address the increased design loads
resulting from any out of tolerance elements (i.e., code
refers to Mislocation) installed during construction, in
addition to those noted above.
5. You are required to provide Redundancy for specific structures
and you must identify the critical elements in the
structure that may not fail in order to meet the “Collapse
Prevention” requirement of structural integrity.
a. Suggest using more than one pile to support the columns
of the Lateral Forces Resisting System (LFRS)
and include redundancy here regardless of load versus
pile capacity. Your LFRS must survive and remain
intact after a ground motion event.
b. Pay attention to pile anchorage, and column anchorage
of the LFRS. Things get tight and congested
here and I often design based on required dimensions
needed to anchor/hook/edge distance, etc., more so
than strength requirements of an economical section.
Final suggestions
•• Don’t try and make the foundation of your building project
the cheapest element of the building. You may regret
this approach when it’s too late to make any corrections
and a support problem occurs.
•• Design something that is constructible and don’t put the
burden of deep foundation installation purely on the contractor.
Get some help from experience professionals in
the region of your project. PDCA is a great resource for
this information.
MB Western Industrial Contracting Co.
MB Western Industrial Contracting Co.
MB Western Industrial Contracting Co.
MB Western Industrial Contracting Co.
Civil, Piling & Marine Construction
Civil, Piling & Marine Construction
Civil, Piling & Marine Construction
Civil, Piling & Marine Construction
Safety, Quality, Experience & Value
Safety, Quality, Experience & Value
Safety, Quality, Experience & Value
Safety, Quality, Experience & Value
“Safety Drives Our Success”
“Safety Drives Our Success”
“Safety Drives Our Success”
Phone: 281-487-5757
www.mbwestern.com
“Safety Drives Our Success”
Phone: 281-487-5757
www.mbwestern.com
Phone: 281-487-5757
www.mbwestern.com
Phone: 281-487-5757
www.mbwestern.com
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40 | ISSUE 5 2017
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