TP-150T3 Work Platform

Project Overview

Equipment

TP-150 T3

Tradewinds Generator Set

Platform Height

6'-0"

72" above grade

Walkway Width

3'-0"

36" clear

Configuration

U-Shape

3-sided wrap (S, W, N)

Deck Area

~131 SF

Bar grating deck

Est. Weight

~1,775 lb

0.9 tons aluminum

Wind Speed

180 mph

ASCE 7-22, Exp. C

Total Columns

HSS 4x4x1/4

Design Codes

Code	Application
ASCE 7-22 / FBC 7th Ed.	Minimum design loads (180 mph, Exp. C, Risk Cat II)
Aluminum Design Manual 2020	Member and connection design
AWS D1.2	Structural welding code — aluminum
OSHA 1910.29 / 1910.25	Railing and stair requirements
ACI 318-19 Ch. 17	Post-installed anchor design

Material Specifications

Component	Material	Specification
All structural members	6061-T6 Aluminum	ASTM B221/B308/B209
Railing (posts, rails, kick plate)	6061-T6 Anodized R201	AA-M12C22A31
Bar grating	6061-T6, 1-1/4"x3/16" serrated	NAAMM MBG 532, 19-W-4
All hardware	316 Stainless Steel	ASTM F593/F594
Welding filler	ER4043	AWS D1.2 Table 4.1

General Notes (14 items)

1. All structural aluminum: 6061-T6 unless noted.
2. All hardware: 316 stainless steel.
3. Welding per AWS D1.2 by certified welders.
4. Railing finish: Anodized R201 (clear).
5. Other structure: mill finish.
6. Grating: 1-1/4"x3/16" serrated per NAAMM MBG 532.
7. Freestanding on concrete pad; (4) 5/8" 316SS wedge anchors per column.
8. Min. concrete: f'c = 4,000 psi, 8" thick.
9. Field verify generator dimensions before fabrication.
10. Submit shop drawings for approval before fabrication.
11. Dimensions to centerline unless noted.
12. 1/4" gap at grating for thermal expansion.
13. Designed for 180 mph ultimate wind, Exp. C, Risk Cat II.
14. Galvanic isolation at all aluminum-to-concrete interfaces.

Structural Calculations Summary

Design Loads

Dead Load

13 PSF

Grating + framing

Live Load

50 PSF

OSHA industrial

Wind Pressure

60.0 PSF

qz at z=6', 180mph Exp C

Concentrated

250 lb

On 4 in² (OSHA)

Wind Pressure Calculation

      V = 180 mph (ASCE 7-22 Fig. 26.5-1B)

      Kz = 0.85 (Exposure C, z ≤ 15')

      Kzt = 1.0 (flat terrain)

      Kd = 0.85 (open frame)

      Ke = 1.0 (sea level)

      qz = 0.00256 × Kz × Kzt × Kd × Ke × V²

      qz = 0.00256 × 0.85 × 1.0 × 0.85 × 1.0 × (180)²

      qz = 59.93 PSF → Use 60.0 PSF

Member Capacity Summary

Member	Section	Governing Check	D/C Ratio	Utilization
Column	HSS 4x4x1/4	Combined axial + bending	0.088
Main beam	HSS 6x4x1/4	Bending	0.007
Inner beam	HSS 4x3x3/16	Bending	0.019
Cross beam	HSS 3x2x3/16	Bending	0.075
Grating	1-1/4"x3/16"	Conc. load bending	0.643
Railing post	1-1/2" Sch 40	Bending (200 lb)	1.32	*
Top/mid rail	1-1/2" Sch 40	Bending (50 PLF)	0.077
X-brace	L 2x2x3/16	Net tension	0.187
Base plate	10x10x1/2 PL	Bearing / bending	0.027
Anchors	5/8" 316SS	Tension+shear interaction	0.275
Stair stringer	C8x2.5	Bending	0.082
Stair rail post	1-1/2" Sch 40	Bending (200 lb)	0.983

Deflection Summary

Element	Deflection	Limit	Ratio
Column drift	0.107"	H/60 = 1.20"	0.089
Main beam	0.001"	L/240 = 0.133"	0.004
Cross beam	0.014"	L/240 = 0.150"	0.094
Grating (uniform)	0.018"	L/360 = 0.089"	0.206
Grating (conc.)	0.139"	0.250" (NAAMM)	0.556
Stair stringer	0.044"	L/240 = 0.413"	0.107

Stability Checks

Check	Demand	Capacity	Ratio	Status
Overturning (E-W wind)	88,752 in-lb	101,495 in-lb	0.875	OK
Anchor uplift (net)	1,267 lb	6,400 lb	0.198	OK
Anchor shear (sliding)	231 lb/bolt	3,000 lb/bolt	0.077	OK

Member Schedule

Columns

HSS 4x4x1/4

6061-T6 | 15 ea. | 72" long | 4.41 lb/ft

Main Beams (Outer)

HSS 6x4x1/4

6061-T6 | 3 pcs | 5.59 lb/ft

Inner Beams

HSS 4x3x3/16

6061-T6 | 3 pcs | 2.81 lb/ft

Cross Beams

HSS 3x2x3/16

6061-T6 | 17 ea. | 36" long | 1.93 lb/ft

X-Bracing

L 2x2x3/16

6061-T6 | 12 diag. | Tension-only | 0.84 lb/ft

Railing Posts

1-1/2" Sch 40 Pipe

6061-T6 Anodized | 23 ea. | 0.942 lb/ft

Rails (Top & Mid)

1-1/2" Sch 40 Pipe

6061-T6 Anodized | 10 pcs | 0.94 lb/ft

Stair Stringers

C8x2.5 Channel

6061-T6 | 2 ea. | 122.5" long | 3.49 lb/ft

Connection Details

C-1: Beam to Column (Welded)

Weld: 1/4" fillet, all around (20" total per joint)
Filler: ER4043 per AWS D1.2
Capacity: 40.7 kips ≫ 0.53 kips demand (D/C = 0.013)

C-3: Column to Base Plate (Welded)

Weld: 5/16" fillet, all around (16" total per joint)
Base Plate: 10"x10"x1/2" PL with (4) 5/8" 316SS wedge anchors on 7x7 pattern
Galvanic Isolation: Neoprene pad + isolating sleeves at all anchors
Grout: Non-shrink per ASTM C1107, 1/2"-1" thick

C-4: Railing Post to Beam (Bolted)

Post Base Plate: 4"x4"x3/8" PL welded to post (3/16" fillet all around)
Bolts: (4) 3/8"-16 x 1-1/4" 316SS hex cap screws through beam top flange
Capacity: 4,650 lb/bolt ≫ 1,400 lb demand (D/C = 0.301)

C-5: X-Brace Gusset Connection

Gusset: 6"x6"x3/8" triangular plate, 6061-T6
Gusset-to-Frame Weld: 1/4" fillet, two edges (12" total)
Brace-to-Gusset: (2) 3/8"-16 316SS bolts through angle leg
Capacity: 6.18 kips ≫ 2.23 kips demand (D/C = 0.361)

Weld Schedule

Detail	Joint	Weld Size	Type	Length/Joint	Filler
C-1	Beam to column	1/4"	Fillet, all around	20"	ER4043
C-2	Cross beam to main beam	3/16"	Fillet, all around	10"	ER4043
C-3	Column to base plate	5/16"	Fillet, all around	16"	ER4043
C-4	Post to post base plate	3/16"	Fillet, all around	7.5"	ER4043
C-5	Gusset to frame	1/4"	Fillet, two edges	12"	ER4043
C-7	Stringer to base plate	1/4"	Fillet, 3 sides	16"	ER4043
C-8	Kick plate to post plate	3/16"	Fillet, each side	4"	ER4043

Bolt Torque Schedule — 316 Stainless Steel

Bolt Size	Torque (ft-lb)	Application
1/4"-20	4	Stair tread clips
5/16"-18	8	Grating clips, set screws
3/8"-16	15	Braces, railing, inner beam clips
1/2"-13	30	Stair clip angles
5/8"-11	55	Base plate anchor bolts

Fabrication Proposal

Fabrication at Delray Beach, FL. Delivery to Monroe County, FL. Proposal valid 30 days. Feb 2026.

Materials

Aluminum structural stock (1,596 lb @ $4.00/lb)$6,384.00

Bar grating — platform + stair treads (156 SF)$5,535.00

Stair nosing strips (9 ea.)$225.00

316SS hardware (anchors, bolts, nuts, washers, clips)$1,899.20

Galvanic isolation materials (neoprene pads, sleeves)$340.00

Welding consumables (ER4043 wire, argon, tips, discs)$1,078.50

Anodizing — railing components (163 SF, R201 clear)$1,554.00

Total Materials$17,015.70

Shop Labor (254.5 hours @ $125/hr)

Cutting & sawing (25.3 hrs)$3,161.25

Drilling & punching (19.9 hrs)$2,487.50

Fitting & assembly (52.1 hrs)$6,511.25

Welding — AWS D1.2 aluminum (66.7 hrs)$8,333.75

Grinding & finishing (23.0 hrs)$2,875.00

Pre-assembly & QC (32.0 hrs)$4,000.00

Grating trial fit (7.5 hrs)$937.50

Disassembly, packaging & loading (18.0 hrs)$2,250.00

Material handling (10.0 hrs)$1,250.00

Total Shop Labor$31,806.25

Engineering & Design (100 hours @ $125/hr)

Structural design & calculations (40 hrs)$5,000.00

Connection design & detailing (16 hrs)$2,000.00

Shop drawing preparation (24 hrs)$3,000.00

BOM / cut list generation (4 hrs)$500.00

Project management & coordination (12 hrs)$1,500.00

PE review & stamping (4 hrs)$500.00

Total Engineering$12,500.00

Freight & Transportation

Flatbed truck — Delray Beach to Monroe County (~200 mi)$2,400.00

Florida Keys surcharge (US-1 single road access)$400.00

Oversized load coordination (members to 13'-4")$200.00

Dunnage & tie-down materials$200.00

Total Freight$3,200.00

Subtotal (before contingency)$64,521.95

Contingency (5%)$3,226.10

Subtotal (before tax)$67,748.05

FL Sales & Use Tax @ 7.5% (FL 6.0% + Monroe Co. 1.5%)$5,081.10

TOTAL PROJECT COST$72,829.15

Exclusions: Field installation, concrete foundation, building permits, generator rigging, electrical, bonds.
Schedule: 6-8 weeks from order to delivery.
Terms: 50% upon order, 40% upon delivery, 10% net 30.
Tax Note: Engineering may qualify for exemption if separately invoiced by PE firm (FL Statute 212.08).

Bill of Materials

Category	Mark	Description	Material	Section	Qty	Wt (lb)
Columns	COL	Columns A1-A6, B1-B3, C1-C6	6061-T6	HSS 4x4x1/4	15	397.5
Main Beams	MB	Outer beams Sides A, B, C	6061-T6	HSS 6x4x1/4	3	210.5
Inner Beams	IB	Inner edge beams Sides A, B, C	6061-T6	HSS 4x3x3/16	3	106.0
Cross Beams	XB	At each column location	6061-T6	HSS 3x2x3/16	17	98.6
X-Bracing	BR	Diagonal braces (tension-only)	6061-T6	L 2x2x3/16	12	66.4
Gussets	GP	Brace gusset plates	6061-T6	3/8" PL 6x6	24	26.4
Base Plates	BP	Column base plates	6061-T6	1/2" PL 10x10	15	73.5
Railing	RP/SP	Posts (platform + stair)	6061-T6 Anod.	1-1/2" Sch 40	23	71.9
Railing	RPB	Post base plates	6061-T6	3/8" PL 4x4	23	11.5
Rails	TR/MR	Top & mid rails (all sides)	6061-T6 Anod.	1-1/2" Sch 40	10	82.0
Kick Plate	KB	Toe boards (all sides)	6061-T6 Anod.	Flat 4"x1/4"	5	42.8
Grating	GR	Platform deck panels	6061-T6	1-1/4"x3/16" serr.	16	291.8
Stair	SS	Stair stringers	6061-T6	C8x2.5	2	71.2
Stair	ST	Stair treads (grating)	6061-T6	1-1/4"x3/16" serr.	9	48.6
Stair	STA+SN	Tread angles + nosing strips	6061-T6	L 1-1/2x1-1/2x1/8	27	14.4
Stair	SR	Stair rails & posts	6061-T6 Anod.	1-1/2" & 2" Pipe	12	70.0
Clips	CA	Inner beam & stair clip angles	6061-T6	L 3x3x1/4 + L 4x3x3/8	19	17.5
Hardware	HW	316SS bolts, nuts, washers, anchors, clips	316SS	Various	~1,000 pcs	~100
					Total	~1,775 lb

Cut List — Stock Summary

Section	Total Linear (ft)	Stock Length	Sticks Needed	Notes
HSS 4x4x1/4	90.0	20'	5	15 columns @ 72"
HSS 6x4x1/4	37.7	20'	2	3 main beams
HSS 4x3x3/16	37.7	20'	2	3 inner beams
HSS 3x2x3/16	51.0	20'	3	17 cross beams @ 36"
L 2x2x3/16	79.0	20'	4	12 braces @ ~79"
1-1/2" Sch 40 Pipe	240.2	21'	12	23 posts + 5 top + 5 mid + 4 stair rails
Flat Bar 4"x1/4"	43.7	20'	3	5 kick plate pieces
C8x2.5 Channel	20.4	21'	1	2 stair stringers
L 1-1/2x1-1/2x1/8	16.5	20'	1	18 tread angles
L 4x3x3/8	1.3	20'	1	2 stair clips
L 3x3x1/4	5.7	20'	1	17 inner beam clips
Total Stock			37 sticks	+ plate sheets, grating