Market
Private Development Structural Engineering
Private development work often requires excavation support, specialty foundations, and coordination around dense urban conditions.
Relevant project examples
Structural engineering for private development projects involving deep excavations, below-grade parking, and constrained urban sites.
- Wilshire Grand Center
- 6th & Bixel
- 1201 S. Hope
- BLVD 6200 North and South
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Portfolio
Additional project records
011000 COVE WAY
Legacy project record
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0210642 SANTA MONICA
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031200 CAHUENGA
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041200 STEVEN WAY
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051340 S. HILL
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061545 PINE STREET
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071550 EUCLID
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081818 CHEROKEE
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091840 HIGHLAND
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10201 LEXINGTON
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112211 GLENDALE
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122225 SUNSET
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132922 CRENSHAW
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143223 WILSHIRE
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15336 W. 7TH STREET
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163400 SUNSET
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173401 LA CIENEGA
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184037 EAGLE ROCK
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19404 4TH STREET
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20418 FARING
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21433 VERMONT
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224519 ST. CLAIR
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23500 E COLORADO
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24508 E. SOUTH TEMPLE
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25510 OXFORD
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26515 PIONEER
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275420 SUNSET
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286200 VARIEL
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296569 VAN NUYS
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30712 OLIVE
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31755 FIG
Legacy project record
755 FIG This project's excavation requirements compile many different shoring systems with many unconventional aspects. Cefali & Associates was contracted by Brookfield and later assigned to Malcolm Drilling. The excavation varied in depth from 25 feet to 97 feet. Heavy building surcharges, internal bracing schemes, and access and construction constraints are some of the project difficulties. The excavation was in a narrow lot, surrounded and surcharged by a concrete retail building and a 13-story concrete parking structure. Scouring through record drawings, iterating design options with the project Geotechnical and Structural Engineers, coordinating logistics with the contractors were continual efforts. A multi-row internally braced bulkhead, where tiebacks could not be used, was devised. The bracing foundation was laterally restrained by tiebacks and accommodated a two-stage brace installation and casting. Site access limitations required that a pedestrian bridge be built from the existing concrete parking structure over the excavation that acted as an exit. The bridge was supported from the shoring piles at the top of excavation, but also at a lower tier of shoring approximately 20 feet below. This lower tier of shoring increased the bridge height by 35 feet. An existing vault structure required underpinning and a unique corner-bracing scheme that resolved thrust with walers and horizontal tiebacks where an elevator shaft prevented ordinary tiebacks. Malcolm Drilling constructed a temporary construction platform that sat and pulled on the southern temporary shoring piles. Contractor logistics/access shoring was added to an interior temporary earthen ramp which allowed for early construction of portions of the building's foundations and tower crane installation.










32828 LILIAN
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338377 BLACKBURN
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348740 LA TIJERA
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358777 WASHINGTON
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368TH & FIG
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378TH & OLIVE
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388TH & SPRING
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399344 NIGHTINGALE
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40AVA HOLLYWOOD
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41BRAND & WILSON
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42BROADWAY @ 4TH
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43BROADWAY & THOMAS
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44BROADWAY PALACE
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45COLUMBIA SQUARE
Legacy project record
COLUMBIA SQUARE The Columbia Square redevelopment of the old Sunset CBS property took us 60 feet below the old media grounds. Narrow street widths required the tiebacks to extend below the streets from property line to property line. Deep utilities were skirted with steep anchors and long spans. Up to 5 rows of tiebacks were used. While The historic structures sat undergoing refurbishment, corner-braces and rakers were used help the contractor, Hathaway Dinwiddie, mitigate the network of 3 tieback rows used beneath the buildings in 3 directions.






46CRESCENT DRIVE
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47CULVER STEPS
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48CULVER STUDIOS
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49CUMULUS
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50CURSON TERRACE
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51DISNEY-ABC TELEVISION BUILDING
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52EPIC
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53FERRANTE
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54FULLERTON HEIGHTS
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55G-8
Legacy project record
G-8 Eighth and Grand in the urban core of DTLA, is 7 story mixed use development over a four-level parking basement totaling almost 500,000 square feet. This site sits adjacent to two existing historic buildings. With a depth of 40 feet, the site required tied-back and raker-braced soldier piles. The construction was complicated by the presence of a deep basement 20 feet from the basement wall. Raker braces had to be used because of the presence of the nearby basement wall. Additionally, the raker bearing pad had to be located in an awkward location immediately adjacent to the P4 wall line. This meant that the raker pad would have its support removed by the adjacent excavation. However, by utilizing a tied-back raker pad the P4 level could be excavated and constructed in the desired location and the required lateral support was supplied by a line of tiebacks well within the site.






56GOODLAND
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57GRAND AVENUE
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58GREENSTREET
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59GUERIN VALLEYHEART
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60HANOVER HOLLYWOOD
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61HARVARD
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62LUCENA ON COURT
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63MELROSE TRIANGLE
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64MONARCH COAST
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65OLD TOWN NEWHALL
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66PACIFIC & PINE
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67SARBONNE
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68SHORELINE GATEWAY & THE CURRENT
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69TEN50
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70THE DAIRY
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71THE DEPOT
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72THE RISE HOLLYWOOD
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73THE RISE KOREATOWN
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74THE ROY
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75THE VILLAGE
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76VERANDAS
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77VIBIANA
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78VIRGINIA APARTMENTS
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79VISTA MONTEREY
Legacy project record
VISTA MONTEREY The Vista Monterey project in the city of Corona is a community designed by Architects Orange. Sares Regis Group employed Cefali & Associates to design top-down style retaining walls for the project. These walls are comprised of soil nails and soldier piles. The tallest portions of the soil nail wall are 25 feet tall with 5 rows of nails that are limited in length due to the proximity of the property line. Soldier pile walls were used on either sides of the nail wall where easements for the nails were not permitted. The walls were built by Condon-Johnson. The city required that wall walls be decorative and so both styles of walls received a BoulderScape rock face.







80WAVERLY TERRACE
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81WHOLE FOODS
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