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425 W 34th St
10-Story NYC Mid-Rise

Architecture · Structure · MEP · Energy · DOB Filing — every discipline, live in your browser. 295,000 sf Manhattan footprint. 10 floors. Steel moment frame. 350 structural members. VAV HVAC. Pre-computed simulations.

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11 Building Levels
350 Structural Members
40 VAV HVAC Zones
144k kWh/year (EnergyPlus)
295k sf Floor Area

Five Disciplines. One Model.

Every engineering domain, coordinated in real-time

Toggle each view in the 3D editor. DAG constraint propagation keeps every discipline in sync.

🏛 Architecture
Architecture
Exterior envelope (80′ × 120′ Manhattan footprint), curtain wall north/east, brick masonry south/west, interior partitions. 11 levels (ground + mezz + 8 typical + roof) with parametric level binding. 80 rooms, 2 stair cores.
80 rooms 10 floor plates 2 stairs DAG-solved
🔩 Structure
Structural Engineering
W14x90 steel columns on 5×7 grid, W18x35 spandrel beams at each floor, W24x76 transfer beams at podium level (3.658m). ASCE 7-22 code checks with pre-computed DCR stress values. 350 members, all PASS. Max DCR 0.89 — within limit.
350 members DCR ≤ 0.90 ASCE 7-22 AISC 360-22
🔧 MEP
Mechanical, Electrical, Plumbing
VAV HVAC (40 zones, supply/return/exhaust risers, branch ducts + diffusers per floor). Wet-wall plumbing: cold/hot water, soil, vent stacks. NFPA 13 wet sprinkler: ring main + 240 heads. 400A MDP panels + EMT conduit + lighting/receptacle circuits.
40 VAV zones 240 sprinkler heads 4 plumbing risers 400A electrical
⚡ Energy
Energy Analysis
ASHRAE 90.1-2019-compliant EnergyPlus simulation. 40 VAV zones, NYC climate zone 4A (IcyBox). Annual consumption, 8760-hour hourly profile, peak cooling/heating loads, EUI 48.7. EN-001 through EN-008 compliance all PASS.
144,420 kWh/yr 48.7 EUI kBtu/sf EnergyPlus 40 zones
📋 DOB Filing
NYC DOB Compliance
DOB energy filing package — 9 PDFs (EN-001 through EN-008 + Document Index) generated from pre-computed EnergyPlus results. ASHRAE 90.1-2019 baseline vs. proposed model. Download the complete package directly.
EN-001 to EN-008 BC §27-292 LL97 / NYStretch 9-PDF bundle

Version History

Eight milestones from massing to filing

Initial massing
Exterior envelope created — 80ft × 120ft Manhattan footprint. Curtain wall north/east (1" IG, thermally broken), brick on CMU south/west. 11 levels: ground floor + mezzanine + 8 typical floors + roof.
6 days ago · Sarah K.
Structural grid finalized
Steel column grid placed — W14x90 primary columns at 12.5ft spacing, W18x35 beams at each floor level. Structural FEA run completed.
4 days ago · Mike R.
Interior layout v1
Level 1 interior partition layout created — lobby, open office, electrical room, stair core. 6.5" metal stud partitions.
3 days ago · Elena T.
Doors and windows added
Entry doors, windows added to all elevations. NYC double-hung on east/west facades. 60-min fire-rated doors at stair. Low-E glazing on L2.
2 days ago · Sarah K.
MEP routing v1
HVAC supply/return ducts, plumbing wet-wall risers and fixture branches, NFPA 13 sprinkler mains and pendent heads. 400A electrical panel + conduit runs.
1 day ago · Dave L.
Current model
DOB filing check in progress. Egress width verified at 48" — passes NYC BC §27-292. Energy simulation running. Window head height confirmed per BC §1206.
12 hours ago · Sarah K. Current version

Live Collaboration

3 others are here — and 4 open issues

Live session open — 3 visitors browsing now Read-only · Pan, zoom & click elements · Ghost cursors visible
A
E
T

NYC Mid-Rise — Live Session

3 visitors here
Model viewport — ghost cursors visible

Auto-disconnect after 5 min idle · Read-only — sign up to edit

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SK
Sarah K.
Editing — Level 1
Arch view
MR
Mike R.
Editing — Structural
Beam view
⚠
Window head height — verify NYC BC compliance
Open · High priority · Elena T. · 1d ago · 1 comment
📐
Confirm beam spec with structural
Open · Normal priority · Sarah K. · 2d ago · 2 comments
📋
DOB egress width check — Section 27-292
Open · Normal priority · Sarah K. · 6h ago · 2 comments
🪟
Low-E glazing specification needs updating
Open · Low priority · Elena T. · 12h ago · 0 comments

NYC DOB Filing

DOB Energy Filing Package — Ready to Download

9-PDF submission bundle generated from pre-computed EnergyPlus results. All 8 compliance metrics PASS. Download the complete package below.

425 W 34th St — NB Application
BIN 1084889 · Block 758, Lot 17 · B-2 Occupancy · 10-Story · 29,500 sf/floor
100%
Download DOB Package (.zip, 9 PDFs)
EN-001 → EN-008 · ASHRAE 90.1-2019 · LL97 · NYStretch · NYC ECC
✓
EN-001 Building Energy Use — 48.7 EUI (limit 52.0) PASS
✓
EN-002 Interior Lighting Power — 0.55 W/sf (limit 0.60) PASS
✓
EN-003 NYStretch Energy — 41 kBtu/sf (limit 45) PASS
✓
EN-004 LL97 Carbon — 51 kgCO2/sf (limit 55) PASS
✓
EN-005 LPD — 0.08 W/sf (limit 0.10) PASS
✓
EN-006 COP ≥ 3.0 — actual 3.2 PASS
✓
EN-007 SCOP — 0.74 (limit 0.75) PASS
✓
EN-008 HVAC Systems — ASHRAE 90.1-2019 PASS

Energy Simulation

Annual energy profile — EnergyPlus, 8760 hours

NYC climate zone 4A (IcyBox), 40 VAV zones, VAV with reheat HVAC, composite deck floor

144,420
kWh/year
Total Consumption
218
kW
Peak Cooling Load
185
kW
Peak Heating Load
48.7
kBtu/sf/yr
Energy Use Index (EUI)

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