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HomeMy WebLinkAbout74546_10087_Quailty Collision Grapevine-Structural Eng Field Inspection-Corrections98 FIELD REPORT By: Mark Dunlap, P.E. Location of Site: 2051 State Hwy 121 Grapevine, TX 76051 Purpose of Site Visit: Structural observation of construction progress Date of Site Visit: 7 May 2025 Date Report Issued: 8 May 2025 Report Prepared for: Roberto Rivera- Penney Design Group Persons Contacted: Chris Bowles-Superintendent Alex Dornford- Assistant Superintendent 1. TRADES WORKING AT THE TIME OF OUR VISIT • Tops of cmu walls being built. • Structural steel framing, cmu walls, joist and deck approximately 85% complete. • 2nd floor has only a few beams installed. • Roof decking installed in most areas. • Joist erection at drive lane area. Noteable Portions of the Project that are complete • All slabs and diamond joints are installed. • Paint spray booth pits installed. • Slabs all placed. 2. OBSERVATIONS/ ACTION ITEMS • We observed that ALL the steel lintels that are deeper than 8” wide flange members, are missing the required adjustable masonry anchors on each face of the lintel. These anchors will now have to be field installed, either by welding or PAFS, before the veneer block can be set. See Photos 1 and 2, as examples of installed lintels. • Angle lintels appear to be improperly installed. Where our documents called for an L1, which requires a 4 x 3.5 x 5/16 angle per 4” wall thickness, we expected (3) lintels to be installed at a 12”wall, and with the 4” leg vertical. Instead, only (2) were installed and with the 4” leg horizontally, leaving a gap where doors or windows can’t be properly attached when they will 2051 State Hwy 121 Structural Observations 7 May 2025 Grapevine, TX 76051 2 be placed. We will need to check if the strength of the installed lintels turned 90 degrees are adequate where they occur. If they are not adequate, the proper number and orientation will need to be installed. See Photos 3 and 4. • The L2 lintels, requiring a 6 x 3.5 x 3/8 angle per 4” thickness of wall, were also installed with only (2) angles, where (3) are required, and were turned 90 degrees with the 6” leg horizontally, not vertically. We will also need to check if these are adequate, but we suspect they won’t be., Note that the installed condition shows that the horizontal legs protrude past the face of the block walls since the actual dimension of 12” cmu is only 11 5/8”. At the exterior walls this will be problematic catching rainwater as it runs down the exterior face of the cmu and gets trapped by the steel protrusion. Regardless of structural capacity, these exterior lintels will require replacement and installed properly with (3) members and the 6” leg vertically. See Photo 5 and typically what we see sketched next to it. • See screenshot of the architectural cross section on next page. Even though the design documents from both TEC and PDG, and the steel shop drawings all indicate the BOD elevations correctly, the mason missed an entire course and built the common wall bearing point too low. This will affect the roof slope/ drainage substantially. We discussed 4 options: o 1-use tapered insulation to create the proper slope for roof drainage. o 2-use tapered insulation on the left side making the common wall the low point and then create a cricket for roof drainage at the common wall that must be piped out to the side walls, along with overflow scupper. o 3-shore the left end of 11 left side joists, and cut down the bearing elevation by 7” to maintain the intended slope, then re-attach joists to the new bearing elevation. o 4- shore each set of joists along the common wall and provide HSS steel “Shims” to raise up the middle bearing points. Weld the joist seats to the proposed HSS shims and HSS shims to the existing steel bearing plates. Since there are a total of 23 joists that are all bearing on separate plates, the number joists to raise up and weld to these shims is more than double the option above. • There wasn’t enough steel installed for the 2nd floor yet to warrant any comment on them. We will need to do a virtual visit via Teams or FaceTime afer the floor, deck and shear studs are installed, but before the concrete is placed at this level. 2051 State Hwy 121 Structural Observations 7 May 2025 Grapevine, TX 76051 3 Our visits are not a substitute for special inspections as required by the contract documents and the building code. Please forward all inspection reports to us for our record. Photo 1 Photo 2 2051 State Hwy 121 Structural Observations 7 May 2025 Grapevine, TX 76051 4 Photo 3 Photo 4 Photo 5 Corrections Photos Corrections Photos