General Engineering · Engineering Glossary
A tenant improvement (TI) is a construction project that modifies an existing commercial space to suit a new tenant's specific requirements. TI projects range from cosmetic updates to full gut-and-rebuild renovations and typically require engineering drawings and permits for structural, MEP, and any change-of-occupancy work.
Engineering requirements for a TI depend on the scope: opening or removing walls may require structural engineering to verify load paths and design headers; adding or relocating HVAC, plumbing, or electrical systems requires MEP engineering; a change of occupancy (e.g., converting retail to restaurant) triggers code compliance review across all disciplines. TI projects have tight schedules driven by tenant move-in dates and landlord delivery commitments, making fast turnaround on engineering drawings critical. Apex Grid regularly provides TI engineering packages — structural, MEP, or both — across retail, restaurant, medical office, industrial, and office occupancies, with permit-ready deliverables produced on compressed timelines.
Apex Grid Engineering maintains this glossary as a resource for architects, contractors, developers, and property owners who encounter unfamiliar engineering terminology on their projects.
View All Engineering TermsApex Grid's licensed PEs provide general engineering services across multiple jurisdictions — with fast quote turnaround and permit-ready documents.
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