DFT Vendor questions and Customer Answers.pdf

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Attached to
DFT Construction Materials Federal contract opportunity
Solicitation number
FA557525Q0002
Issued by
Department of the Air Force United States Air Forces in Europe - Air Forces Africa

About this file

This document is a Vendor Questions and Customer Answers file for a dog park construction project, providing detailed specifications and clarifications for 82 line items of materials and urban furniture. The project involves comprehensive construction materials including fencing (Hercules Mesh, 6mm thick, 1.2-1.5m height), vegetation (perennial ryegrass at 25-30 g/m²), trees (orange, pinus, and ash trees aged 5-7 years), concrete components, electrical systems, water piping, and extensive urban furniture such as benches, picnic tables, trash cans, bag dispensers, and dog park equipment like slalom, dogwalk, and balance obstacles.

The file provides specific technical details for each item, including dimensions, materials, installation requirements, and acceptable alternatives. Notable specifications include recommendations for tree protection, use of pressure-treated wood, UV-resistant materials, and compliance with European standards. Many urban furniture items are noted as "open to suggestions" with some potentially sourced from Mobipark. The document appears to be part of a solicitation for a dog park construction project, likely for a military base in Spain, with emphasis on using local Spanish materials and meeting Spanish legislative requirements for government works.

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Interested Vendors Questions and Customer Answers

Item No.: 1 Quantity: 319.72 lm Description: FENCE TYPE 1. Electro welded hard galvanized wire mesh. Question: Indicate the type of fence, layout (including corners), height, etc.?

Hercules Mesh 6mm thick, height 1.2m to 1.5m, tubular metal post (50x50mm main fence) door/

Item No.: 2 Quantity: 5.00 u Description: FENCE TYPE 1 - Door Question: Indicate dimensions, heights, layout, whether a lock is required or if a latch is sufficient, etc.?

60x40 mm tubular metal. Each gate is approx. 1.2 m wide for ADA and maintenance access.

Includes self-closing hinges and dog-proof latch. Lock not required for daily use but should allow for padlock if needed after hours.

Item No.: 3 Quantity: 1574.61 m² Description: SUPERFICIAL VEGETATION - PERENNIAL RYEGRASS Question: What is the required dotation for calculating the kilograms of seed?

For durable ryegrass turf in a dog park, seed application should be 25–30 g/m². For 1,575 m², this equals approx. 39–47 kg of seed. Hydroseeding is acceptable and recommended for efficient coverage and erosion control.

Item No.: 4 Quantity: 191.53 m² Description: GRAVEL BACKFILL WHITE Question: What gravel thickness is required for these square meters? Please specify the type of gravel (e.g., landscaping gravel). Can you also indicate the tonnage? Use rounded pea gravel (non-angular, 5– 10 mm) to protect dog paws.

Item No.: 5 Quantity: 8.00 u Description: TREES - ORANGE TREE GREENHOUSE 10 YEARS Question: Does this refer to 10-year-old greenhouse-grown orange trees? Would it be acceptable to offer greenhouse orange trees of a younger age?

Yes, 10-year trees are specified for mature canopy/shade. However, 5–7-year-old healthy, nursery-grown trees may be proposed and properly protected with guards to prevent damage from urination or chewing.

Item No.: 6 Quantity: 2.00 u Description: TREES - PINUS GREENHOUSE 10 YEARS Question: Does this refer to 10-year-old pinus trees? Is it possible to offer ash trees of a younger age?

Yes, 10-year trees are specified for mature canopy/shade. However, 5–7-year-old healthy, Item No.: 7 Quantity: 2.00 u Description: TREES - ASH GREENHOUSE 10 YEARS Question:

Does this refer to 10-year-old ash trees? Is it possible to offer ash trees of a younger age?

Yes, 10-year trees are specified for mature canopy/shade. However, 5–7-year-old healthy, Item No.: 8 Quantity: 1.00 u Description: TREES - ASH GREENHOUSE 25 YEARS Question:

Does this refer to 10-year-old ash trees? Is it possible to offer ash trees of a younger age?

Yes, 10-year trees are specified for mature canopy/shade. However, 5–7-year-old healthy, Item No.: 9 Quantity: 52.00 u Description: BUSHES - ROSEMARY (Romero) Question: No question.

Item No.: 10 Quantity: 39.00 u Description: BUSHES - THYME (Tomillo) Question: No question.

Item No.: 11 Quantity: 250.72 m² Description: SYNTHETIC NON-WOVEN GEOTEXTILE, HEAT WELDED, POLYPROPYLENE Question: No question.

Item No.: 12 Quantity: 109.01 m³ Description: SELECTED COMPACTED SOIL TYPE 2, CBR 10 Question: Does this soil refer to the one required for creating a subbase?

Yes. This item referes to engineered fill used as asubbase layer beneath pavemenet, turf, or gravel areas within the dog park. It must be well-graed, non-expansive soil compacted to meet CBR of 10 or higher to ensure proper load support and drainage.

Item No.: 13 Quantity: 65.41 m³ Description: IN SITU ESCAPE STABILIZATION, BY POURING A CEM II / A-L 32.5 N Question: Does this refer to the cement required to stabilize these cubic meters? Can you indicate the number of 25kg bags needed in this case?

Yes. Assuming 5% cement content: approximately 210bags.

Item No.: 14 Quantity: 146.51 Description: PAVEMENT BASE MADE BY OPEN FILLING, WITH NATURAL LIMESTONE Question: There are no units; we assume it refers to cubic meters of natural soil for planting. Is the soil from inside the Base valid for planting?

Confirmed — this refers to cubic meters of compacted limestone base layer for walkways or activity zones within the dog park.

Item No.: 15 Quantity: 1784.4 m³ Description: BACKFILL SOIL UNDER DOG PARK AREAS. BORROW MATERIAL Question: No question.

Item No.: 16 Quantity: 436.04 m² Description: PRIMER WATERING WITH 1.5 KG/M² OF CATIONIC BITUMINOUS EMULSION Question: It must be offered including the use of a specialized truck for bituminous watering. If not, what allocation is required for these 436 m²?

What quantity of liters is needed?

Yes, a specialized bitumen distributor truck is recommended to ensure uniform application. 654 liters (assuming 1:1 density).

Item No.: 17 Quantity: 25.07 t Description: CONTINUOUS HOT BITUMINOUS MIXTURE AC22 BIN D, FOR Question: No question.

Item No.: 18 Quantity: 25.07 t Description: CONTINUOUS HOT BITUMINOUS MIXTURE AC16 SURF D Question: No question.

Item No.: 19 Quantity: 104.06 m³ Description: CONCRETE HA-25/B/20/XC2 Question: The minimum amount per truck is 8m³. Is this minimum amount acceptable?

yes

Item No.: 20 Quantity: 686.06 m² Description: ELECTROSOLDED MESH ME 15X15 Ø 6-6 B 500 T 6X2.20 UNE-EN 10080 Question: No question.

Item No.: 21 Quantity: 68.61 m³ Description: MASS CONCRETE HL-200 Question: The minimum amount per truck is 8m³. Is this minimum amount acceptable?

yes

Item No.: 22 Quantity: 237.06 lm Description: PREFABRICATED TWO-LAYER CONCRETE PIECE FOR RÍGOLA, 8/6.5X50X50 CM. Question: What does this refer to? Does it refer to a prefabricated drainage channel? Should a grate be included? Are dimensions and additional details required for this?

Yes, this refers to a prefabricated concrete drainage channel (Spanish: “rígola”), dimensions 8.6 x

5.5 x 50 cm. It is used for surface water collection in the dog park, typically along walkways or near entrances. Confirm slopes and connection to drainage system if required

Item No.: 23 Quantity: 10.00 u Description: RUBBER WHEELSTOP DETAIL 1.83 M.

Question: No question.

Item No.: 24 Quantity: 686.06 m² Description: POLYETHYLENE SHEET 0.2 mm THICKNESS Question: No question.

Item No.: 25 Quantity: 49.00 lm Description: PRECAST CONCRETE CURB Question:

Indicate the dimensions.

Item No.: 26 Quantity: 8.00 u Description: ADJUSTABLE PILLAR STARTER FOOT, MADE OF STEEL COATED in "DAC COAT." Question: Indicate the dimensions.

Item No.: 27 Quantity: 24.00 lm Description: PILLAR OF SAWN PINE WOOD. SECTION 140X140 MM, RESISTANT CLASS C24 Question: Request 24 linear meters; what are the dimensions of the sections? For example, are they 6 posts of 4 meters, or 4 posts of 6 meters, or 8 posts of 3 meters?

Use 6 posts at 4 meters each or 8 posts at 3 meters depending on layout spacing. Posts should be treated Class C24 and pressure-treated for outdoor use or in kind.

Item No.: 28 Quantity: 48.00 lm Description: SAWN PINE WOOD BEAM. SECTION 100X200 MM, RESISTANT CLASS C24 UNE-EN 335. Question: Similar question to item 27.

Use 6 posts at 4 meters each or 8 posts at 3 meters depending on layout spacing. Posts should be treated Class C24 and pressure-treated for outdoor use or in kind.

Item No.: 29 Quantity: 2.28 m³ Description: PINE SAW WOOD PURLIN, SECTION 60X200 MM. Question: Please define the dimensions in length.

Item No.: 30 Quantity: 32.00 u Description: GALVANIZED STEEL HARDWARE TYPE

DX51D+Z275N AND ZINC PLATED STEEL THREADED SHEET SCREWS PILLAR -

BEAM Question: Please define the dimensions and type.

Item No.: 31 Quantity: 68.00 u Description: GALVANIZED STEEL HARDWARE TYPE

DX51D+Z275N AND ZINC PLATED STEEL THREADED SHEET SCREWS BELT - BEAM

Question: Please define the dimensions and type.

Item No.: 32 Quantity: 70.00 m² Description: SANDWICH PANEL 30 mm. FOR ROOF Question: Please define the dimensions (width and length).

Sandwich panel is 30 mm thick, standard width 1 meter, length can range from 2 to 6 meters. For dog parks, panels should have anti-condensation coating and be UV-resistant.

Item No.: 33 Quantity: 70.00 m² Description: EXPOSED DECKS OF 118X22 MM TONGUE AND HEM WOODEN BOARDS. Question: Clarify the dimensions and the product.

Boards are 118 mm wide x 22 mm thick, typically in 2.4 m or 3.0 m lengths. Pressure-treated timber or composite wood is recommended for non-slip, low-maintenance deck surfaces in outdoor pet environments

Item No.: 34 Quantity: 61.87 l Description: PLASTIC PAINT FOR OUTDOORS, BASED ON

ACRYLIC RESINS, FOR ROAD MARKING, INCLUDING GLASS MICROSPHERES, FOR

DRY RETROREFLECTIVE EFFECT Question: We understand that it is paint for road markings. Please define the color. The measurements will be adapted to European containers (liters).

Use white or yellow reflective paint, compatible with glass microspheres for visibility.

Item No.: 35 Quantity: 332.86 l Description: COLORLESS PROTECTIVE LIQUID FOR PREVENTIVE TREATMENT AGAINST XYLOPHAGOUS. Question: No questions. The measurements will be adapted to European containers (liters).

Item No.: 36 Quantity: 332.86 l Description: SYNTHETIC VARNISH FOR EXTERIORS, CLOSED PORE, COLORLESS, SATIN FINISH Question: No questions. The measurements will be adapted to European containers (liters).

Item No.: 37 Quantity: 1.00 u Description: PANELBOARD NEMA 3R (or IP65), FOR OUTDOOR INSTALLATION. NUMBER OF CIRCUITS AS DEFINED. Question: We understand it is a waterproof box for outdoor use. Please specify the dimensions.

Yes, this is a waterproof outdoor-rated panel. Must support 4 to 6 circuits , no specifics.

Item No.: 38 Quantity: 3.00 u Description: LUMINAIRE LEC LINCE VERSO 2M 10.000 lm H5. SURFACE MOUNTED Question: No questions.

Item No.: 39 Quantity: 4.00 u Description: DUPLEX RECEPTACLE TYPE "NEMA 5-20R"

GFCI SURFACE MOUNTED AT 480 MM. INCLUDING WEATHER PROTECTION COVER.

Question: Could there be a European substitute? Please define.

Yes. Use Type F or Type E+F (Schuko) IP55-rated GFCI outdoor outlet for EU compliance.

Install in weatherproof enclosures, 480 mm mounting height, with tamper-resistant covers. Open to other options as well.

Item No.: 40 Quantity: 290 m Description: DOUBLE WALL CORRUGATED PE PIPE Ø110mm Question: No questions.

Item No.: 41 Quantity: 310 m Description: COPPER CABLE RZ1-K(AS) 16mm² Question: No questions.

Item No.: 42 Quantity: 72.00 m Description: ELECTRICAL METALLIC TUBING 3/4'' Question: No questions.

Item No.: 46 Quantity: 4.00 u Description: GROUNDING-BONDING MATERIAL SET

(INCLUDING U-BOLT CLAMPS, LUG CONNECTORS & MOUNTING ACCESSORIES)

Question: We understand it is a complete grounding system, including 3-meter-long ground rods and 19mm coated, as well as connectors? Correct

Item No.: 47 Quantity: 4.00 u Description: LUMINAIRE LEC SPAL WITH POLE 6M

Item No.: 48 Quantity: 1.00 u Description: NEW PRECAST ELECTRICAL MANHOLE A1

Item No.: 49 Quantity: 1.00 u Description: COVER AND FRAME OF DUCTIL CAST IRON Question: What traffic category should the cover for the A1 manhole have? C250, D400...? Use D400

Item No.: 50 Quantity: 66.08 lm Description: DOMESTIC WATER PE PIPING 1/2" Question:

No questions. The minimum dimensions are one meter.

Item No.: 51 Quantity: 13.89 lm Description: DOMESTIC WATER PE PIPING 3/4" Question:

No questions. The minimum dimensions are one meter.

Item No.: 52 Quantity: 2.00 u Description: DOUBLE CHECK VALVE ASSEMBLIES Question: Does it refer to a backflow preventer from the USA? Please specify the dimensions.

This product from the USA has a very long delivery time (2 months). To avoid delays, specify a European-standard WRAS- or EN-compliant mode

Item No.: 53 Quantity: 3.00 u Description: 1/2" BALL VALVE DCW Question: No questions.

Item No.: 54 Quantity: 1.00 u Description: 3/4" BALL VALVE DCW Question: No questions.

Item No.: 55 Quantity: 153.6 lm Description: NON-POTABLE WATER PE PIPING 1/2" Question: No questions. The minimum dimensions are one meter.

Item No.: 56 Quantity: 3.00 u Description: 1/2" SPHERE VALVE NPW Question: What is the difference between this item and item 53?

Item 53 (DCW) = Ball valve for Domestic Cold Water (drinking water) Item 56 (NPW) = Sphere valve for Non-Potable Water (e.g., irrigation) Both are 1/2”, but materials and markings differ.

NPW valves often use purple color coding to indicate non-potable use.

Item No.: 57 Quantity: 2.00 u Description: HOSE BIB ENCLOSURE BUILT WITH MASONRY Question: Can you define this item? We believe that it does not exist in the Spanish market.

this can be substituted with a surface-mounted lockable metal cabinet (inox or painted steel) housing the faucet.

Item No.: 58 Quantity: 1.00 u Description: PRECAST CATCH BASIN Question: Does it refer to a manhole with a grate? Please define this product including dimensions.

Yes. It refers to a precast concrete stormwater catch basin with metal grate cover, dimensions typically Box: 50x50x50 cm or 60x60x60 cm Grate: Galvanized steel or ductile iron.

Item No.: 59 Quantity: 58.15 lm Description: DOUBLE WALL DRAIN PIPE NOMINAL DIAMETER 300 mm Question: No questions. The length dimensions will be adapted to the standard tube measurements.

Item No.: 60 Quantity: 0.15 m³ Description: MASS CONCRETE HL-200 Question: Can mortar be supplied for this quantity in 25KG bags?

Yes

Item No.: 61 Quantity: 0.74 m³ Description: CONCRETE HA-30/B/20/XC2 Question: Can mortar be supplied for this quantity in 25KG bags?

Not recommended

Item No.: 62 Quantity: 10.78 kg Description: CORRUGATED REINFORCEMENT STEEL BARS B500S Question: Please specify the dimensions of the rebar.

Use Ø10 mm or Ø12 mm, length depending on structural detail. This weight equals approx. 5.5–

6.0 meters of Ø10 mm rebar. Compliant with UNE-EN 10080

Item No.: 63 Quantity: 15.00 m² Description: WOOD FORMWORK Question: What type of wood? Please specify the dimensions.

Use pine or fir boards, typically 25 mm thick x 200 mm wide, treated or sealed for temporary outdoor use. Should be smooth and safe for use around animals and people.

Item No.: 64 Quantity: 1.00 u Description: VERTICAL TRAFFIC SIGN MADE OF

GALVANIZED STEEL, RECTANGULAR, WITH LEVEL 1 RETROREFLECTANCE (E.G.).

Question: What dimensions should it have and what should it indicate? Post should be Ø60 mm galvanized steel, height 3 m above grade. Used for signage, e.g., dog park rules, usage hours, or contact info. Sign face: approx. 60x80 cm aluminum panel, printed and UV-coated.

Item No.: 65 Quantity: 1.00 u Description: 3 M HIGH POST, MADE OF GALVANIZED

STEEL TUBE, RECTANGULAR SECTION, 80X40X2 MM, FOR VERTICAL TRAFFIC

SIGNALING SUPPORT Question: No questions.

Item No.: 66 Quantity: 3.00 u Description: URBAN FURNITURE. WHEELCHAIR ACCESSIBLE FOUNTAIN Question: Can you provide a manufacturer reference or details?

This item needs to be defined.

Nothing specific open to suggestions

Item No.: 67 Quantity: 21.00 u Description: URBAN FURNITURE. CONCRETE BENCH (Nº16 @ C1010) Question: Can you provide a manufacturer reference or details? This item needs to be defined.

Item No.: 68 Quantity: 5.00 u Description: URBAN FURNITURE. PICNIC TABLES (Nº17 @ C1010) Question: Can you provide a manufacturer reference or details? This item needs to be defined.

Item No.: 69 Quantity: 3.00 u Description: URBAN FURNITURE. TRASHCAN (Nº18 @

Item No.: 70 Quantity: 4.00 u Description: URBAN FURNITURE. BAG DISPENSER (Nº19 @ defined.

Nothing specific open to suggestions

Item No.: 71 Quantity: 2.00 u Description: URBAN FURNITURE. DOG PARKING (Nº20 @ C1010) Question: Can you provide a manufacturer reference or details? This item needs to be

Item No.: 72 Quantity: 3.00 u Description: URBAN FURNITURE. INFO PANEL (Nº21 @

Item No.: 73 Quantity: 2.00 u Description: URBAN FURNITURE. WASTE GARBAGE (Nº22 @ C1010) Question: Can you provide a manufacturer reference or details? This item needs to be

Item No.: 74 Quantity: 2.00 u Description: URBAN FURNITURE. HIGH JUMP (Nº23 @

Item No.: 75 Quantity: 2.00 u Description: URBAN FURNITURE. WHEEL (Nº24 @ C1010) Question: Can you provide a manufacturer reference or details? This item needs to be defined.

Item No.: 76 Quantity: 2.00 u Description: URBAN FURNITURE. SLALOM (Nº25 @ C1010)

Nothing specific open to suggestions. Mobipark

Item No.: 77 Quantity: 1.00 u Description: URBAN FURNITURE. DOGWALK (Nº26 @

Item No.: 78 Quantity: 1.00 u Description: URBAN FURNITURE. LONG JUMP (Nº27 @

Item No.: 79 Quantity: 2.00 u Description: URBAN FURNITURE. TABLE (Nº28 @ C1010)

Item No.: 80 Quantity: 2.00 u Description: URBAN FURNITURE. EMPALIZED (Nº29 @

Item No.: 81 Quantity: 1.00 u Description: URBAN FURNITURE. DOG BALANCE (Nº30 @

Item No.: 82 Quantity: 2.00 u Description: URBAN FURNITURE. TUNNEL (Nº31 @ C1010)

File details come from the government source that posted it. Updated .